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BARC Interview Questions, Process, and Tips

Updated 9 Aug 2024

Top BARC Interview Questions and Answers

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Interview Questionnaire 

3 Questions

  • Q1. Which capacitors-store higher amount of energy?
  • Ans. 

    Electrolytic capacitors store higher amount of energy.

    • Electrolytic capacitors have higher energy storage capacity compared to other types of capacitors.

    • They are commonly used in power supply circuits and audio amplifiers.

    • Examples of electrolytic capacitors include aluminum electrolytic capacitors and tantalum capacitors.

  • Answered by AI
  • Q2. Molecules are held together in crystal by
  • Ans. 

    Molecules are held together in crystals by intermolecular forces.

    • Intermolecular forces, such as hydrogen bonding, electrostatic interactions, and van der Waals forces, hold molecules together in crystals.

    • These forces are responsible for the regular arrangement of molecules in a crystal lattice.

    • Examples of crystals held together by intermolecular forces include salt (sodium chloride) and quartz.

    • The strength and type of ...

  • Answered by AI
  • Q3. C-O bond length is minimum in
  • Ans. 

    C-O bond length is minimum in carbonyl compounds.

    • Carbonyl compounds have a double bond between carbon and oxygen.

    • The C-O bond length is shorter in carbonyl compounds compared to other compounds.

    • Examples of carbonyl compounds include aldehydes, ketones, and carboxylic acids.

  • Answered by AI

Research Scientist Interview Questions asked at other Companies

Q1. 1) self introduction 2) How to develop method for Api to finished products of Assay and Related substances in injectable? 3) column chemistry? 4) method validation 5) ich guidelines
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I applied via Company Website and was interviewed before Aug 2020. There were 3 interview rounds.

Interview Questionnaire 

1 Question

  • Q1. Basic questions were asked

Interview Preparation Tips

Interview preparation tips for other job seekers - If you don't know any particular thing they asked you, then simply say that I don't know.
Don't give any answer

Instrument Engineer Interview Questions asked at other Companies

Q1. 1.General current and voltage working ranges of instruments. 2. Temperature sensors types and working principals. 3. Suitable for working hours or not. 4. General questions related to purpose of instruments required.
View answer (2)
BARC Interview Questions and Answers for Freshers
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Interview Questions & Answers

user image

posted on 28 Nov 2015

I applied via Walk-in

Interview Questionnaire 

16 Questions

  • Q1. They started with general questions like- when you came & where were u staying. They then asked me to say the FIVE subjects in which I feel comfortable
  • Q2. Starting with Digital(my choice)-What is fanout and fanin ?
  • Q3. What is the TTL typical fanout?
  • Ans. 

    The TTL typical fanout is the number of digital inputs that can be connected to a single output without causing signal degradation.

    • TTL stands for Transistor-Transistor Logic.

    • The typical fanout for TTL is around 10.

    • Fanout can vary depending on factors such as the type of TTL and the load capacitance.

    • Exceeding the fanout can lead to signal distortion and reduced noise margins.

  • Answered by AI
  • Q4. Then they asked me to draw totempole circuit
  • Q5. What is the difference between synchronous and ripple counter ..?
  • Q6. Where synchronous circuits are used and where asynchronous are used?
  • Ans. 

    Synchronous circuits are used when timing is critical, while asynchronous circuits are used when flexibility is important.

    • Synchronous circuits use a clock signal to synchronize all operations, ensuring that they happen at the same time.

    • Asynchronous circuits do not use a clock signal and instead rely on signals to indicate when operations should occur.

    • Synchronous circuits are commonly used in digital systems such as mic...

  • Answered by AI
  • Q7. What is the advantage of synchronous than asynchronous?
  • Ans. 

    Synchronous communication ensures real-time interaction and immediate feedback, while asynchronous communication allows for flexibility and convenience.

    • Synchronous communication is ideal for situations that require immediate feedback and real-time interaction, such as video conferencing or online gaming.

    • Asynchronous communication is more flexible and convenient, allowing participants to communicate at their own pace an...

  • Answered by AI
  • Q8. Moving on to EDC(my choice)- How LED emits light ?
  • Ans. 

    LEDs emit light through a process called electroluminescence.

    • Electrons in the semiconductor material recombine with electron holes, releasing energy in the form of photons.

    • The color of the light emitted depends on the materials used in the LED.

    • LEDs are more energy-efficient than traditional incandescent bulbs.

    • LEDs have a longer lifespan than traditional bulbs.

    • LEDs can be used in a variety of applications, from lighting

  • Answered by AI
  • Q9. Can you design a LED controlled by a switch with transistors?
  • Ans. 

    Yes, a LED can be controlled by a switch with transistors.

    • Use a transistor as a switch to control the LED

    • Connect the base of the transistor to the switch

    • Connect the collector of the transistor to the positive terminal of the LED

    • Connect the emitter of the transistor to the negative terminal of the LED

    • Use a resistor to limit the current flowing through the LED

    • Choose the transistor based on the current and voltage require

  • Answered by AI
  • Q10. Moving to 555 timer and oscillator basics- > Draw equvelent circuitt of opamp
  • Q11. They gave a problem on opamp and asked me to find out gain?
  • Q12. Moving on to control -> What is the order of the system?
  • Ans. 

    The order of the system refers to the highest power of the Laplace variable in the transfer function.

    • The order of the system determines the number of poles in the transfer function.

    • It is a measure of the complexity of the system.

    • For example, a second-order system has two poles and can exhibit oscillatory behavior.

    • Higher-order systems can have more poles and exhibit more complex behavior.

  • Answered by AI
  • Q13. Design a electronic circuit for given transfer function
  • Ans. 

    Design an electronic circuit for a given transfer function.

    • Identify the transfer function and its parameters

    • Choose appropriate components for the circuit

    • Use circuit analysis techniques to design the circuit

    • Simulate and test the circuit to ensure it meets the desired transfer function

    • Iterate and refine the design as necessary

  • Answered by AI
  • Q14. Impulse response and step response of system
  • Ans. 

    Impulse response is the output of a system when an impulse is applied. Step response is the output when a step function is applied.

    • Impulse response is the derivative of step response

    • Impulse response is used to determine the frequency response of a system

    • Step response is used to determine the stability of a system

    • Both responses are important in signal processing and control systems

  • Answered by AI
  • Q15. Draw the bode plot for given transfer function?
  • Ans. 

    Bode plot is a graph of magnitude and phase of transfer function vs frequency.

    • Find the poles and zeros of the transfer function

    • Determine the frequency range for the plot

    • Calculate the magnitude and phase of the transfer function for each frequency

    • Plot the magnitude and phase on separate graphs with frequency on the x-axis

    • Label the graphs with appropriate units and scales

  • Answered by AI
  • Q16. Lastly one design problem -> they drew two pulses and asked me-> How will you findout the time difference between pulses?

Interview Preparation Tips

Round: Technical Interview
Experience: They asked me for my 5 favourite subjects.
I listed:
1.microprocessors
2.digital electronics
3.communication
4.elec devices.
5.control systems

my interview was of about one and half an hour ........in between if you don't know the answer they will give some clues....finally i did not get a medical slip........on that day two persons were given medical slips.....if we get the medical slip we are selected.
Tips: ALL THE BEST FOR ALL....PREPARE WELL AND make opamps as one of your fav subject..



Skill Tips: Make op-amp as your favourite subject.

Skills: Control System, Electronic devices, Communication, Digital Electronics, Microprocessor

I applied via Referral

Interview Questionnaire 

16 Questions

  • Q1. What is hagen poiseuille equation and when can it be used
  • Ans. 

    The Hagen-Poiseuille equation describes the flow of a viscous fluid through a cylindrical pipe or tube.

    • The equation relates the flow rate of the fluid to the pressure difference, viscosity, length, and radius of the pipe.

    • It can be used to calculate the flow rate or pressure drop in various fluid systems, such as blood flow in blood vessels or water flow in pipes.

    • The equation assumes laminar flow, where the fluid flows ...

  • Answered by AI
  • Q2. What is bernoulli's equation and its limitations
  • Ans. 

    Bernoulli's equation relates the pressure, velocity, and height of a fluid in motion.

    • The equation is based on the conservation of energy principle.

    • It is commonly used in fluid mechanics to analyze the flow of fluids through pipes and over surfaces.

    • The equation assumes that the fluid is incompressible, non-viscous, and steady-state.

    • It also assumes that the flow is laminar and that there is no heat transfer or work done ...

  • Answered by AI
  • Q3. A logical question regarding fluid flow between two tanks placed at different heights
  • Q4. Pump characteristic curves and the relations
  • Ans. 

    Pump characteristic curves show the relationship between flow rate, head, and power.

    • Pump characteristic curves depict the performance of a pump under different operating conditions.

    • The curves show the relationship between flow rate (Q), head (H), and power (P).

    • The curves help in selecting the right pump for a specific application.

    • The curves can be used to determine the efficiency and operating range of a pump.

    • Different...

  • Answered by AI
  • Q5. Different types of valves for fluid flow control
  • Ans. 

    Valves are used to control fluid flow. Different types include gate, globe, ball, butterfly, and needle valves.

    • Gate valves: used for full open or full close control

    • Globe valves: used for throttling control

    • Ball valves: used for quick shut-off control

    • Butterfly valves: used for low-pressure control

    • Needle valves: used for precise flow control

    • Other types include diaphragm, pinch, and check valves

  • Answered by AI
  • Q6. Heat transfer basic questions
  • Q7. Type of heat exchangers and their selection criteria
  • Ans. 

    Heat exchangers are devices used to transfer heat between two or more fluids.

    • Types of heat exchangers include shell and tube, plate, and finned tube heat exchangers.

    • Selection criteria for heat exchangers include heat transfer efficiency, pressure drop, material compatibility, and cost.

    • Shell and tube heat exchangers are commonly used in industries such as oil and gas, chemical, and power generation.

    • Plate heat exchangers...

  • Answered by AI
  • Q8. Design methodology for heat exchnager
  • Ans. 

    A design methodology for a heat exchanger involves several steps and considerations.

    • Identify the heat transfer requirements and constraints

    • Determine the type and size of heat exchanger suitable for the application

    • Select the appropriate materials for construction

    • Calculate the required surface area for heat transfer

    • Design the flow arrangement and determine the fluid flow rates

    • Consider pressure drop and fouling factors

    • Per...

  • Answered by AI
  • Q9. Co-current and counter current heat exchanger temperature profiles
  • Ans. 

    In a co-current heat exchanger, the hot and cold fluids flow in the same direction, resulting in a gradual decrease in temperature. In a counter current heat exchanger, the fluids flow in opposite directions, leading to a more efficient heat transfer.

    • Co-current heat exchanger: gradual decrease in temperature

    • Counter current heat exchanger: more efficient heat transfer

    • Co-current: hot and cold fluids flow in the same dire...

  • Answered by AI
  • Q10. Velocity profiles inside pipeline and boundary layer formations
  • Ans. 

    Velocity profiles inside pipeline and boundary layer formations

    • Velocity profiles inside a pipeline refer to the distribution of fluid velocities across the cross-section of the pipe.

    • Boundary layer formations occur when fluid flows over a solid surface, creating a thin layer of fluid near the surface with different velocity characteristics.

    • Velocity profiles inside a pipeline can be influenced by factors such as pipe dia...

  • Answered by AI
  • Q11. Various phases in heating liquid
  • Ans. 

    The various phases in heating liquid are solid, liquid, and gas.

    • Heating a solid substance causes it to melt and become a liquid.

    • Continued heating of the liquid causes it to evaporate and become a gas.

    • Examples include heating ice to form water and then heating water to form steam.

  • Answered by AI
  • Q12. Diffusion basics
  • Q13. Mccabe Thiele method and its assumptions
  • Ans. 

    The McCabe Thiele method is a graphical technique used to analyze binary distillation processes.

    • Assumes constant molar overflow

    • Assumes constant relative volatility

    • Assumes ideal behavior of the components

    • Assumes equilibrium between liquid and vapor phases

    • Assumes constant molar flow rates

    • Assumes constant temperature and pressure

  • Answered by AI
  • Q14. Cooling towers priciple
  • Q15. Gas absorption and Stripping profiles
  • Q16. What is a daily used CSTR type equipment in kitchen
  • Ans. 

    A daily used CSTR type equipment in kitchen is a pressure cooker.

    • Pressure cookers are used to cook food quickly and efficiently.

    • They work by trapping steam inside the pot, which raises the pressure and temperature.

    • This allows food to cook faster and retain more nutrients.

    • Examples of dishes that can be made in a pressure cooker include soups, stews, and rice.

    • Pressure cookers come in different sizes and materials, such a

  • Answered by AI

Interview Preparation Tips

Round: Test
Experience: For Direct Interview - Should have min GATE cutoff score decided by BARC (Changes every year).
Written test for ones who did not write GATE or did not have enough GATE score.

Round: Technical Interview
Experience: As its been more than 6 years that I had gone through this interview, the above were some of the questions I could recall. The interview went for around 50 min. The committee firstly asks our favorite 3-4 subjects. I chose Fluid mechanics(FM), Heat Transfer(HT), Mass Transfer(MTO), Thermodynamics and Chemical Reaction Engg(CRE) in the given order f preference. The committee would normally have 5-6 members. First 15 minutes the questions were regarding FM, then 15 minutes regarding HT and further 10 min for MTO, last 10 min thermodynamics and CRE which I totally screwed up. The weightage lies with the performance in first three subjects you chose as favorite. The committee is really friendly.They do not pressurize nor try to confuse you. They always give hints to go in the right path. I have stumbled alot in between, but the committee was quite supportive in getting answers from me. After the interview was over, I came out and in 2 min, the attender came out and gave me the medical examination chit. At that time (2009), getting a medical slip gives 90% chances of getting the job. Presently I think getting medical slip gives 50% chances of getting the job.
Tips: Don't think that your academic history would impress them. You selection totally is based on your performance in the interview. Be thorough with the basics of all the core subjects and wisely choose the fav subjects. Always try to understand the hints given by the committee. All they expect is that if the candidate can relate the theory to practical or not. And if you have zero idea about a question do not hesitate to confront rather than blabbering something wrong.

General Tips: Communication skills do not matter in this interview.
Skill Tips: Just brush up the basics. No need to remember all the formulas and equations. I just read Mccabe Smith before the interview.
Skills: Knowledge in Core subjects
College Name: Chaitanya Bharathi Institute Of Technology (CBIT)
Motivation: Scope for exploring new fields, salary Package

Top BARC Scientific Officer Interview Questions and Answers

Q1. What is hagen poiseuille equation and when can it be used
View answer (2)

Scientific Officer Interview Questions asked at other Companies

Q1. What is hagen poiseuille equation and when can it be used
View answer (2)

BARC interview questions for popular designations

 Scientific Officer

 (5)

 Project Intern

 (1)

 Project Manager

 (1)

 Scientific Officer C

 (1)

 Research Fellow

 (1)

 Research Scientist

 (1)

 Civil Engineer

 (1)

 Instrument Engineer

 (1)

Interview Questions & Answers

user image

posted on 28 Nov 2015

I applied via Walk-in

Interview Questionnaire 

1 Question

  • Q1. Questions on my 5 subjects of my choice - Network Theory, EDC, Digital, Controls, Analog circuits

Interview Preparation Tips

Round: Technical Interview
Experience: First there was documents verification. We were given a form to fill details. After documents verification is done they call you for interview.

My interview lasted for about 1hr15mins.
They asked me which were my favorite subjects....(u need to tell 5)....mine were
Network Theory, EDC, Digital, Controls, Analog circuits........
They asked questions from these subjects only. On the whole it was a good experience. The panel is very cooperative and give you ample amount of hints. if you can present your ideas well and have good subject knowledge, then I feel you can make it. If u do well then you are given medical examination slip, which means you are selected for sure.

what happened to me was.....after the interview i was asked to wait for 2 minutes(i dont know what happened behind the door) after that i was asked to leave. I did not get the medical test slip.
any ways. Thats it from my side. All the best

Tips: They go in depth and it can be subject oriented or practical application oriented. So be prepared to encounter some surprising questions

General Tips: have in depth (both prac knowledge of all the 5 subject you point out in the interview.
Skill Tips: have in depth knowledge of all the 5 subject you point out in the interview.
Skills: Control System, Analog Circuits, Digital Circuits, EDC - Electronic Data Capture, Network Theory

Interview Questions & Answers

user image

posted on 28 Nov 2015

I applied via Walk-in

Interview Questionnaire 

16 Questions

  • Q1. Differentiator circuit using opamp?(circuit diag,waveform,explaination & if..then sort of a Questions were asked)
  • Ans. 

    A differentiator circuit using opamp is a circuit that produces an output voltage proportional to the rate of change of the input voltage.

    • The circuit consists of an opamp, a capacitor, and a resistor.

    • The input voltage is applied to the non-inverting input of the opamp.

    • The output voltage is taken from the output of the opamp.

    • The capacitor and resistor are connected in series between the output and the inverting input of...

  • Answered by AI
  • Q2. What is virtual ground?
  • Ans. 

    Virtual ground is a point in a circuit that is maintained at a constant voltage level despite changes in current flow.

    • Virtual ground is often used in op-amp circuits to create a reference point for the input signal.

    • It is created by connecting the inverting and non-inverting inputs of an op-amp together.

    • Virtual ground is not a physical ground, but rather a voltage level that behaves like ground.

    • It is important to mainta...

  • Answered by AI
  • Q3. Draw a circuit to implement V=V1+V2?
  • Ans. 

    A circuit to implement V=V1+V2

    • Use two voltage sources V1 and V2

    • Connect them in series

    • Measure the voltage across the series connection

  • Answered by AI
  • Q4. An opamp configuration was given with -ve feedback.In the feedback path two diodes were connected in parallel with reverse polarity.A triangular wave was given at the i/p . Question was explain the circu...
  • Ans. 

    Opamp with -ve feedback and parallel diodes in feedback path, triangular wave at i/p. Explain circuit and o/p waveform.

    • The diodes act as clamping diodes, limiting the output voltage swing

    • The output waveform will be a clipped triangular wave

    • The amplitude of the output waveform will depend on the forward voltage drop of the diodes

    • The frequency of the output waveform will be the same as the input triangular wave

  • Answered by AI
  • Q5. What is backend technology? VLSI uses backend/frontend?
  • Ans. 

    Backend technology refers to the server-side of an application. VLSI uses backend technology for designing and testing of integrated circuits.

    • Backend technology refers to the server-side of an application

    • It includes the database, server, and application logic

    • VLSI uses backend technology for designing and testing of integrated circuits

    • Frontend technology refers to the client-side of an application

    • It includes the user in

  • Answered by AI
  • Q6. What is DRC checker?
  • Ans. 

    DRC checker is a software tool used to check the design rule compliance of integrated circuits.

    • DRC stands for Design Rule Check.

    • It is used to ensure that the layout of an integrated circuit meets the specifications of the design.

    • DRC checker is an important tool in the semiconductor industry.

    • Examples of DRC checkers include Calibre, IC Validator, and Hercules.

    • DRC checker can detect errors such as short circuits, open ci...

  • Answered by AI
  • Q7. Explain CMOS fabrication steps?
  • Ans. 

    CMOS fabrication involves multiple steps including wafer preparation, photolithography, etching, and doping.

    • The process starts with wafer preparation, where a silicon wafer is cleaned and polished.

    • Next, a layer of oxide is grown on the wafer surface.

    • Photolithography is then used to pattern the oxide layer with a photoresist material.

    • Etching is used to remove the oxide layer in the areas not covered by the photoresist.

    • D...

  • Answered by AI
  • Q8. What type of etching is used during photolithography process?
  • Ans. 

    The photolithography process uses a type of etching called wet etching or dry etching.

    • Wet etching involves using a liquid chemical solution to remove material from the substrate.

    • Dry etching involves using plasma or reactive ions to remove material from the substrate.

    • The choice of etching method depends on the material being etched and the desired outcome.

    • Examples of materials commonly etched during photolithography inc...

  • Answered by AI
  • Q9. What does 1nm technology specify? Few other related stuffs
  • Q10. Draw 4-bit ring counter and explain its working with waveforms?(
  • Ans. 

    A 4-bit ring counter is a circuit that cycles through four states in a circular pattern.

    • A ring counter is a type of shift register that has feedback from the last stage to the first stage.

    • The output of each stage is connected to the input of the next stage, with the last stage connected to the first stage.

    • The counter advances one step on each clock pulse, with the output of one stage becoming high and the others low.

    • Th...

  • Answered by AI
  • Q11. Draw a BJT circuit which acts as a switch? why is Vce(sat)=0.2V? what will happen if resistor is connected in between emitter & ground point & many other related Q?
  • Ans. 

    A BJT circuit can act as a switch with Vce(sat)=0.2V. Adding a resistor between emitter and ground affects the switching speed.

    • BJT circuit can be configured as a switch by connecting the base to a voltage source and the collector to the load.

    • When the base-emitter junction is forward-biased, the transistor turns on and allows current to flow through the collector-emitter path.

    • Vce(sat) is the voltage drop across the coll...

  • Answered by AI
  • Q12. Draw circuit diagram of a tubelight? How is it functioning?
  • Ans. 

    A tubelight circuit diagram consists of a choke, starter, and a tube filled with gas. It functions by ionizing the gas inside the tube to produce light.

    • The circuit diagram includes a choke, starter, and a tube filled with gas

    • The choke regulates the current flow to the tube

    • The starter provides a high voltage to ionize the gas inside the tube

    • The ionized gas produces ultraviolet light which is converted to visible light b...

  • Answered by AI
  • Q13. How does your fan regulator works? What is being changed? How does it control the fan speed?
  • Ans. 

    Our fan regulator works by changing the voltage supplied to the fan motor, which in turn controls the fan speed.

    • The regulator adjusts the voltage supplied to the fan motor

    • This changes the speed of the fan blades

    • The regulator can be adjusted manually or automatically based on temperature or humidity

    • Examples of fan regulators include rheostats, triacs, and pulse-width modulators

  • Answered by AI
  • Q14. Explain the pts in an electrical socket? What is shown in the CRO if probes of the CRO are inserted in the two live wires? What if one is connected to earth?
  • Ans. 

    The points in an electrical socket are live, neutral, and earth. If probes of the CRO are inserted in the two live wires, the CRO will show AC voltage. If one is connected to earth, the CRO will show a voltage of zero.

    • Electrical sockets have three points: live, neutral, and earth

    • If probes of the CRO are inserted in the two live wires, the CRO will show AC voltage

    • If one live wire is connected to earth, the CRO will show...

  • Answered by AI
  • Q15. How does a TESTER work? Explain its general operation? Will the LED glow if the end is contacted wearing ur slippers?
  • Ans. 

    A tester is an electronic device used to check the presence of an electric current in a circuit.

    • A tester works by completing a circuit and measuring the flow of electricity.

    • It typically has two probes, one positive and one negative, that are used to make contact with the circuit.

    • If the circuit is complete and there is electricity flowing, the tester will indicate this through a light or sound.

    • Wearing slippers will not ...

  • Answered by AI
  • Q16. An electrician who comes to do ne electric work always has a bulb & a socket in his kit.when he connects one end of the wire to the line & other to neutral wht happens? will the bulb glow? what happens wh...

Interview Preparation Tips

Round: Technical Interview
Experience: Interview date: 25th June
Location: BARC Mumbai
Duration:1.30hrs
Status: Not Qualified
Interview started with a brief discussion on my BE project(duration:5-10min appx)
5 fav sub:
1.Analog integrated circuits
2.VLSI
3.Digital design
4.Semiconductor Devices
5.Power Electronics

Tips: For everything u write in paper counter questions will always b asked. So b strong with your basics & b clear with what you are putting down.
My suggestion whatever subject u do it deeply.Clear your Basics as much as u can. If & else type question will always be asked whenever you ans to a Question so b prepared.
Think from a practical application point of view too.

General Tips: For everything u write in paper counter questions will always b asked. So b strong with your basics & b clear with what you are putting down.
My suggestion whatever subject u do it deeply.Clear your Basics as much as u can. If & else type question will always be asked whenever you ans to a Question so b prepared.
Think from a practical application point of view too.
Skills: Power Electronics, Semiconducto, Digital Design, VLSI, Analog Integrated Circuits

Skills evaluated in this interview

Interview Questions & Answers

user image

posted on 28 Nov 2015

I applied via Walk-in

Interview Questionnaire 

6 Questions

  • Q1. They gave a network n have to find current through particular resistor at t=0+;0-; t infinite(transients problem)
  • Q2. Equivalent potential btw two points 4 given network
  • Ans. 

    Equivalent potential between two points in a given network.

    • Equivalent potential is the potential difference between two points in a network when the current flow is zero.

    • It is also known as the no-load voltage.

    • It can be calculated using the principle of superposition.

    • Equivalent potential is important in electrical engineering for analyzing circuits and designing power systems.

  • Answered by AI
  • Q3. They gave i/p and o/p wave forms. We have to design circuit(clampers problem)
  • Q4. They asked about pll diagram;lock range,capture range which is greater??
  • Q5. In digital probs on counters (practical Qs);flash type A-D conv block diagram
  • Q6. Some Questions on micro processors 8085,8086 data lines,address lines,address locations,some programs etc

Interview Preparation Tips

Round: Technical Interview
Experience: first intro(2 min)
Then they asked my fav subs.
I said networks,controls,communications,digital.

Overall the interview was easy but I didn’t prepare for interview.
They are very cool and helping(8 members in my panel)
On that day out of 16 people from ece, one person got medical slip.


General Tips: first intro(2 min)
Then they asked my fav subs.
I said networks,controls,communications,digital.

Overall the interview was easy but I didn’t prepare for interview.
They are very cool and helping(8 members in my panel)
On that day out of 16 people from ece, one person got medical slip.

Skill Tips: So prepare well just go through basics and be perfect in 5 subjects that's enough to crack this interview.
Skills: Digital Communications, Communication, Control System, Communication Networks

Interview Questions & Answers

user image

posted on 28 Nov 2015

I applied via Walk-in

Interview Questionnaire 

9 Questions

  • Q1. Analog. I was asked to draw a basic CE amplifier and asked the function of all the capacitors I had drawn coupling bypass
  • Q2. Then was asked to explain how i can say emitter terminal is common when Re is connected
  • Q3. I was asked the gain of the amplifier i had made also was then asked why potential divider biasing
  • Q4. What is Q point draw the load line explain the characteristics How do you get the various regions
  • Ans. 

    Q point and load line are used to analyze the operating point and characteristics of a transistor circuit.

    • Q point is the operating point of a transistor circuit where the DC load line intersects with the transistor characteristic curve.

    • Load line is a graphical representation of the circuit's DC characteristics.

    • The various regions of operation are cutoff, active, and saturation.

    • Cutoff region is when the transistor is of...

  • Answered by AI
  • Q5. Then they proceeded to Opamps and spent a lot of time on it. was asked to draw basic opamp amplifier, what is gain, derive it
  • Q6. What is virtual ground. Can you prove it that both are at same potential
  • Ans. 

    Virtual ground is a concept used in electronics where a point in a circuit is considered to be at ground potential even though it is not actually connected to ground.

    • Virtual ground is created by using an op-amp or a voltage divider circuit.

    • It is used to provide a reference point for signals in a circuit.

    • Both points in a virtual ground circuit are at the same potential due to the feedback mechanism.

    • Examples of virtual g...

  • Answered by AI
  • Q7. One of the members them gave a problem on opamp to find output when i/p and gain given one more on cmrr concept
  • Q8. Then proceeded to a precision rectifier
  • Q9. The interview continued on the same lines all basics of diodes, a problem on Rs of a diode

Interview Preparation Tips

Round: Technical Interview
Experience: One of the panel members asked me to hand over my marksheets so he could have a look and also took the project report i was carrying. after the initial enquiries background how was the written test etc. they asked Me to write down 5 subjects of My interest.

One of the Members then started with Analog.

in digital was asked to design a counter and so forth.
the interviewers r very helpful and will provide ample hints, they'll literally get you to the ans. I got nervous after some 50 ins into the interview and was offered water and tea. :)

anyway towards the end...final half hour questions focussed on the project and power electronics.

anyway towards the end...final half hour questions focussed on the project and power electronics.

I couldn’t help but admire the people sitting on the opposite side
thats all i guess.. the interview lasted for 1 hr 30 mins approx..

After the interview was asked to wait outside for 5 minutes I was stuffing my marksheets and report in my bag hastily and was preparing to leave, when a ma'am came and gave me the medical slip....was on 7th heaven :) looking forward to joining DAE.

Skills: ADC, Analog Communications

Interview Questions & Answers

user image

posted on 28 Nov 2015

I applied via Walk-in

Interview Questionnaire 

15 Questions

  • Q1. They asked about op-amps then into transistors and then with both of them
  • Q2. He asked me to "draw open loop gain with frequency curve of op-amp "
  • Q3. Draw a shift register
  • Ans. 

    A shift register is a digital circuit that can store and shift data bits sequentially.

    • A shift register can be implemented using D flip-flops or shift register ICs.

    • It can be used for serial-to-parallel or parallel-to-serial data conversion.

    • A common example is the 74HC595 shift register used in LED matrix displays.

    • Shift registers can also be cascaded to increase the number of bits that can be stored and shifted.

  • Answered by AI
  • Q4. Convert that shift register into an asynchronous counter
  • Ans. 

    To convert a shift register into an asynchronous counter, connect the output of the last flip-flop to the input of the first flip-flop.

    • Connect the output of the last flip-flop to the input of the first flip-flop

    • Use the clock input of the first flip-flop as the clock input for the counter

    • Use the output of the first flip-flop as the least significant bit (LSB) of the counter

    • Use the output of the last flip-flop as the mos

  • Answered by AI
  • Q5. Convert a d-flip flop to a t-flip flop without using any gate
  • Ans. 

    Convert a D-flip flop to a T-flip flop without using any gate.

    • Connect the Q output of the D-flip flop to the T input

    • Connect the complement of the Q output to the D input

    • This will toggle the output on every clock pulse

    • No additional gates are required

  • Answered by AI
  • Q6. The voltage levels of various families
  • Ans. 

    Different families have different voltage levels for their electrical systems.

    • The North American residential voltage level is 120V AC.

    • European residential voltage level is 230V AC.

    • Industrial voltage levels can range from 208V to 480V AC.

    • High voltage transmission lines can range from 69kV to 765kV AC.

    • Some countries have multiple voltage levels depending on the region.

  • Answered by AI
  • Q7. O/p of a ttl inverter when 1v is applied (not logic 1 but 1v)
  • Ans. 

    The output of a TTL inverter when 1V is applied is logic 0.

    • TTL inverter has a threshold voltage of 0.8V

    • Any input voltage below 0.8V is considered logic 1

    • Any input voltage above 2V is considered logic 0

    • Input voltage between 0.8V and 2V is undefined

  • Answered by AI
  • Q8. Why ecl is the fastest ?
  • Ans. 

    ECL is the fastest due to its optimized design and parallel processing capabilities.

    • ECL is designed to optimize performance and minimize disk I/O

    • ECL uses parallel processing to distribute workloads across multiple cores and nodes

    • ECL also has built-in caching mechanisms to reduce data retrieval times

    • ECL's compiler generates highly optimized code for efficient execution

    • ECL supports vectorized operations for faster data p

  • Answered by AI
  • Q9. Control sys. what is open loop and closed loop?
  • Ans. 

    Open loop and closed loop are two types of control systems used in engineering.

    • Open loop control system does not have feedback mechanism while closed loop control system has feedback mechanism.

    • Open loop system is less accurate and less reliable than closed loop system.

    • Examples of open loop system include washing machine with timer while examples of closed loop system include thermostat and cruise control in a car.

  • Answered by AI
  • Q10. Control sys why is closed loop preferred to open?
  • Ans. 

    Closed loop control is preferred over open loop control due to its ability to adjust for disturbances and maintain stability.

    • Closed loop control uses feedback to adjust the system output based on the desired input and actual output.

    • Open loop control does not use feedback and relies solely on the input to produce the desired output.

    • Closed loop control is more accurate and reliable as it can adjust for disturbances and m...

  • Answered by AI
  • Q11. Control sys. in a ce amp. what is the feedback?
  • Ans. 

    Feedback in a control system of a CE amplifier is a process of returning a portion of the output signal back to the input to regulate the amplifier's gain and performance.

    • Feedback is used to stabilize the amplifier's output and reduce distortion.

    • Negative feedback is commonly used in CE amplifiers to improve linearity and reduce noise.

    • The amount of feedback can be adjusted using a feedback resistor.

    • Feedback can also aff...

  • Answered by AI
  • Q12. Control sys. how Re is the feedback and what is the advantage?
  • Ans. 

    Feedback in control systems provides information to adjust the system's output.

    • Feedback allows for adjustments to be made to the system's output based on the difference between the desired output and the actual output.

    • This can improve the accuracy and stability of the system.

    • Examples of feedback control systems include thermostats, cruise control in cars, and autopilot systems in airplanes.

    • The advantage of feedback con...

  • Answered by AI
  • Q13. Control sys. tell any one position sensor
  • Ans. 

    A position sensor is a device that measures the position of an object relative to a reference point.

    • Linear variable differential transformer (LVDT)

    • Rotary encoder

    • Potentiometer

    • Hall effect sensor

    • Optical encoder

  • Answered by AI
  • Q14. Control sys. draw a position and velocity control sys
  • Ans. 

    A position and velocity control system can be designed using a proportional-integral-derivative (PID) controller.

    • Use a PID controller to regulate the position and velocity of a system

    • The controller takes in the desired position and velocity as inputs and outputs a control signal

    • The control signal is used to adjust the system's actuators to achieve the desired position and velocity

    • Tune the PID controller's gains to achi...

  • Answered by AI
  • Q15. Control sys. where do we use controllers and why?
  • Ans. 

    Controllers are used in control systems to regulate and maintain desired outputs.

    • Controllers are used in various industries such as manufacturing, automotive, aerospace, and HVAC systems.

    • They are used to regulate and maintain desired outputs such as temperature, pressure, flow rate, and speed.

    • Controllers can be simple or complex depending on the system requirements.

    • Examples of controllers include PID controllers, on-of

  • Answered by AI

Interview Preparation Tips

Round: Technical Interview
Experience: first they asked where i have done my project, I told ECIL then one of them
started asking about the project
they asked me about my favorite subject i told
1)analog
2)digital
3)control sys
4)comm.
5)microcontrollers.

Interview lasted for 1 hour.

Skills: Knowledge About Microcontrollers, 1)communication, Control System, Digital Communications, Analog

Interview Questions & Answers

user image

posted on 28 Nov 2015

I applied via Walk-in

Interview Questionnaire 

15 Questions

  • Q1. Ok write TF of PID controller and apply it to plant process
  • Ans. 

    PID controller is a feedback control system that continuously calculates an error value and applies a correction based on proportional, integral, and derivative terms.

    • TF of PID controller is (Kp + Ki/s + Kd*s)

    • Plant process can be any system that requires control, such as a temperature control system or a robotic arm

    • The PID controller can be applied to the plant process by tuning the values of Kp, Ki, and Kd to achieve ...

  • Answered by AI
  • Q2. :- Do we require H(S) in PID controlled control system
  • Ans. 

    H(S) is not required in PID controlled control system.

    • PID controllers do not require transfer functions like H(S)

    • PID controllers use feedback to adjust the output

    • H(S) is used in open-loop control systems

    • PID controllers are closed-loop control systems

    • Example: Temperature control using a PID controller

  • Answered by AI
  • Q3. But we should have always unity feedback and not H(S). then why use proportional
  • Q4. Why not use only proportional. Draw that offset error
  • Ans. 

    Proportional control alone cannot eliminate offset error.

    • Proportional control only responds to the current error, not past errors.

    • Offset error occurs when the steady-state error is non-zero.

    • Integral control is needed to eliminate offset error by continuously adjusting the control signal.

    • Example: A thermostat using only proportional control would overshoot the desired temperature and never reach it.

    • Example: A cruise con...

  • Answered by AI
  • Q5. Draw an integral controller
  • Ans. 

    An integral controller is a type of feedback controller that uses the integral of the error signal to adjust the control output.

    • An integral controller is used to eliminate steady-state error in a system

    • The controller continuously integrates the error signal over time

    • The output of the controller is proportional to the integral of the error signal

    • The integral controller is represented by the symbol 1/s in the Laplace dom...

  • Answered by AI
  • Q6. Say in IT banking industry you must have come across large numbers that u need to store; how will store that numbers
  • Q7. Say we have a number 1.00123456788 how will we store
  • Ans. 

    The number can be stored as a floating-point data type with a precision of at least 12 digits.

    • Floating-point data type can store decimal numbers with a fractional part.

    • Precision refers to the number of digits that can be stored after the decimal point.

    • In this case, a precision of at least 12 digits is required to store the number 1.00123456788.

  • Answered by AI
  • Q8. Write the program for a COBOL program for above question
  • Q9. 1.00123456788 how will we store. How in Double floating precision format A:- I said I am not aware
  • Ans. 

    Storing 1.00123456788 in double floating precision format

    • Double floating precision format is a binary format that stores numbers with a fractional component.

    • It uses 64 bits to store the number, with 52 bits for the mantissa and 11 bits for the exponent.

    • To store 1.00123456788, we would use the double data type in most programming languages.

    • In Java, for example, we would declare a variable as 'double num = 1.00123456788;

  • Answered by AI
  • Q10. Write the number in EBCDIC format or have you heard of IEEE standard
  • Q11. Draw an opamp with gain of 10. We want a positive gain
  • Ans. 

    Opamp with positive gain of 10.

    • Use an inverting amplifier configuration.

    • Connect the input signal to the inverting input terminal.

    • Connect a feedback resistor from the output to the inverting input.

    • Connect a resistor from the inverting input to ground.

    • Choose resistor values to achieve a gain of 10.

    • Ensure the opamp is powered with appropriate voltage levels.

  • Answered by AI
  • Q12. Derive the gain equation
  • Ans. 

    Derive the gain equation

    • Gain equation relates the output signal to the input signal

    • It is expressed as Gain = Output/Input

    • In electronics, gain is often measured in decibels (dB)

    • The gain equation can be derived using circuit analysis and mathematical equations

  • Answered by AI
  • Q13. Where is the closed path for current through flow in op-amp
  • Ans. 

    The closed path for current through flow in op-amp is within the feedback loop.

    • The feedback loop is the closed path for current through flow in op-amp.

    • The feedback loop consists of resistors and capacitors.

    • The feedback loop determines the gain and stability of the op-amp.

    • The closed path for current through flow is important for analyzing the behavior of the op-amp.

  • Answered by AI
  • Q14. Now if we remove the ideal op-amp of gain infinity and put another opamp of gain 100 ; what will be the change in output
  • Ans. 

    Replacing ideal op-amp of gain infinity with op-amp of gain 100 will change the output.

    • Output will decrease by a factor of 100

    • The circuit's gain will decrease by a factor of 100

    • The output will be less precise due to the finite gain of the op-amp

  • Answered by AI
  • Q15. Gave couple of network questions

Interview Preparation Tips

Round: Technical Interview
Experience: Number of Panel Members :- 6
interview lasted 1 hr 10 mins..

Here goes the interview :-
PM1:- Passout of 2007, what were you doing after that ??
A:- Joined IT industry
PM1 Then why did you left?
A:- I want to work in core field
PM1:- Then why join IT
A:-They have told me that they will give core profile since they have got one in Railway signalling system. But since they haven’t provided any such profile; I resigned and given GATE to pursue M.Tech
( It was here that I think there was some mis-communication ; a very bad one that may have cost me my interview. One of panel members was convinced that I had worked in Signalling industry and started asking industry components as we will see later….)
PM1:- So it appear you are interested in signal; so we will ask signals and systems whether you like it or not? So applied for M.Tech?
A:- Yes IIT-B(RA); DIAT Pune
PM1:- Write your subjects of interest
EDC;
Network;
Digital;
Control;
Analog

PM1: So have you ever thought of entrepreneurship; setting up a company and taking the signal system orders from railways; and if IT is paying so much it is very less as compared to BARC…and you people know how we answer such questions …)

Skills: Analog, Control System, Difital Communication, Network, EDC

Skills evaluated in this interview

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BARC Interview FAQs

How many rounds are there in BARC interview?
BARC interview process usually has 2 rounds. The most common rounds in the BARC interview process are Technical, Resume Shortlist and One-on-one Round.
What are the top questions asked in BARC interview?

Some of the top questions asked at the BARC interview -

  1. what is hysteresis and eddy current loss ? ld is made sinusoidal in cylindrical...read more
  2. What is hagen poiseuille equation and when can it be u...read more
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