Johnson Controls Graduate Engineer Trainee (Get) Interview Questions, Process, and Tips for Freshers

All questions are good along with tricky

Q1. What are your final year projects
Ans. 
My final year project is a mobile application for tracking and managing personal finances.
• Developing a user-friendly interface for inputting expenses and income

• Implementing data visualization tools to track spending habits

• Incorporating budgeting features to help users manage their finances effectively
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Q2. Introduce yourself
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Before apptitude round you will asked to select your stream, so as I'm from ECE I've selected ECE. So questions will be related to that only. In 60 min there were 75 MCQ questions with very bad website UI, So don't get shocked if you see no line breaks in code.

Question are from these domain:
- Microprocessor/Microcontroller (15 questions)
- Digital Electronics (10 questions)
- Analog electronic and Network Theory (10 questions)
- OOPs and psuedocode (15 questions)
- General Apptitude and Logical reasoning (15 questions)
- other basic ECE and CSE questions ( 10 questions)

Out of 70 students they selected only 6 from our college. Try to attempt more than 65 questions to get selected in this round. Fortunately I was selected in apptitude round.

Q1. So before the technical Round they will have 1 hr pre placement talks. After that individual interview will start. If You're from ECE you will strictly be interviewed from ECE subjects only. Partially ther...read more
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Q2. Different between latches and flip flop
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Latches and flip flops are sequential logic circuits used to store data. Flip flops are edge-triggered while latches are level-triggered.
• Latches are level-triggered and can be transparent or opaque

• Flip flops are edge-triggered and can be positive or negative edge-triggered

• Latches are simpler and faster than flip flops

• Flip flops are more reliable and less prone to glitches than latches

• Examples of latches include SR latc...read more
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Q3. Draw Jhonson Counter and explain its working?
Ans. 
Johnson Counter is a digital circuit that counts in a cyclic pattern.
• It is a type of shift register with feedback

• It has a sequence of n bits that cycle through 2^n-1 states

• It is used in digital clocks, frequency dividers, and memory address decoding

• Example: 4-bit Johnson counter has a sequence of 0001, 0010, 0100, 1000, 0001, ...

• It can be implemented using D flip-flops or JK flip-flops
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Q4. What is the use of counter and How it is different from Shift registers.
Ans. 
Counters are used to count the number of clock pulses and generate output signals. Shift registers are used to store and shift data.
• Counters are sequential circuits that count the number of clock pulses and generate output signals.

• They can be used in applications such as frequency dividers, event counters, and timers.

• Shift registers are used to store and shift data in a serial manner.

• They can be used in applications su...read more
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Q5. Draw XOR gate write truth table
Ans. 
Draw XOR gate truth table
• XOR gate has two inputs and one output

• Output is 1 only if inputs are different

• Truth table: 0 XOR 0 = 0, 0 XOR 1 = 1, 1 XOR 0 = 1, 1 XOR 1 = 0
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Q6. What are Universal Gates and draw OR gate from one Universal Gate?
Ans. 
Universal Gates are gates that can be used to implement any logic function. OR gate can be drawn from a Universal Gate.
• Universal Gates include NAND and NOR gates

• NAND and NOR gates can be used to implement any logic function

• OR gate can be drawn from a NAND gate by connecting both inputs together

• OR gate can be drawn from a NOR gate by connecting both inputs together and inverting the output
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Q7. Draw block diagram of PID controller
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A PID controller is a feedback control loop that calculates an error value as the difference between a desired setpoint and a measured process variable.
• The block diagram of a PID controller consists of three main components: the proportional, integral, and derivative terms.

• The proportional term produces an output that is proportional to the error signal.

• The integral term produces an output that is proportional to the i...read more
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Q8. Find equivalent resistance of the given circuit
Ans. 
Find equivalent resistance of the given circuit
• Identify series and parallel connections

• Use Ohm's law to calculate individual resistances

• Combine resistances using series and parallel rules

• Final answer should be in Ohms
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Q9. Why 8085 is called 8 bit processor
Ans. 
8085 is called 8 bit processor because it can process 8 bits of data at a time.
• 8085 has an 8-bit data bus and can process 8 bits of data at a time

• It has an 8-bit accumulator and can perform arithmetic and logical operations on 8-bit data

• It has 16-bit address bus which can address up to 64 KB of memory

• Examples of 8-bit processors include Intel 8080, Zilog Z80, and MOS Technology 6502
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Q10. No of intrupts in 8085. Explain all
Ans. 
8085 has 5 interrupts. TRAP, RST 7.5, RST 6.5, RST 5.5, INTR
• 8085 has 5 interrupts: TRAP, RST 7.5, RST 6.5, RST 5.5, INTR

• TRAP is a non-maskable interrupt

• RST 7.5, RST 6.5, and RST 5.5 are maskable interrupts

• INTR is a maskable interrupt and can be enabled or disabled by setting the interrupt enable flip-flop

• Interrupts are used to handle external events and improve the efficiency of the system
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Q11. Difference between Microprocessor and microcontroller
Ans. 
Microprocessor is a single chip CPU while microcontroller is a complete computer on a chip.
• Microprocessor is used in general purpose computing while microcontroller is used in embedded systems.

• Microprocessor has limited on-chip peripherals while microcontroller has on-chip peripherals like timers, ADC, etc.

• Microprocessor requires external memory and peripherals while microcontroller has them on-chip.

• Examples of micropr...read more
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Q12. Different flags in 8086 and its high and low condition
Ans. 
Flags in 8086 and their high and low conditions
• 8086 has 9 flags: Carry, Parity, Auxiliary Carry, Zero, Sign, Trap, Interrupt, Direction, Overflow

• Flags can be set or reset based on the result of arithmetic and logical operations

• High condition means the flag is set, while low condition means the flag is reset
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Q13. Draw Npn aur pnp transistor
Ans. 
NPN and PNP transistors are drawn using three layers of semiconductor material.
• Draw two vertical lines representing the two outer layers of the transistor.

• Draw a diagonal line connecting the top of the left line to the bottom of the right line for NPN transistor.

• Draw a diagonal line connecting the top of the right line to the bottom of the left line for PNP transistor.

• Add arrows to indicate the direction of current flo...read more
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Q14. Draw and explain different terminal of BJT
Ans. 
Explanation of different terminals of BJT
• BJT has three terminals: emitter, base, and collector

• Emitter is heavily doped and has the highest concentration of charge carriers

• Base is lightly doped and controls the flow of charge carriers from emitter to collector

• Collector is moderately doped and collects the charge carriers from the base

• The direction of current flow is from emitter to collector
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Q15. Different operating region of BJT
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BJT has three operating regions: active, saturation, and cutoff.
• Active region: both junctions are forward-biased.

• Saturation region: both junctions are reverse-biased.

• Cutoff region: base-emitter junction is reverse-biased and base-collector junction is forward-biased.

• BJT operates as an amplifier in the active region.

• BJT operates as a switch in the saturation and cutoff regions.
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Q16. Difference between BJT and FET
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BJT is a current-controlled device while FET is a voltage-controlled device.
• BJT stands for Bipolar Junction Transistor while FET stands for Field Effect Transistor.

• BJT has a higher gain and faster switching speed than FET.

• FET has a higher input impedance and lower noise than BJT.

• BJT is commonly used in low-power applications while FET is commonly used in high-power applications.

• Examples of BJT include NPN and PNP trans...read more
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Q17. Different analog to digital conversation techniques
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Analog to digital conversion techniques include pulse code modulation, delta modulation, and sigma-delta modulation.
• Pulse code modulation (PCM) samples the analog signal at regular intervals and quantizes each sample into a binary code.

• Delta modulation (DM) approximates the slope of the analog signal and encodes the difference between the approximated value and the actual value.

• Sigma-delta modulation (SDM) oversamples ...read more
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Q18. This question was from my project on Robotics arm: 1. Explain Block diagram of your Robotics arm 2. Why are you using servo motor on your robotics arm not other motor and different types of motor
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It was aptitude plus technical test which was easy and very basic questions were asked

Q1. Interview was easy for me as I have good technical knowledge. But it was really hard for others
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Q2. Explain PID controller
Ans. 
PID controller is a feedback control mechanism used in engineering to regulate a system's output.
• PID stands for Proportional-Integral-Derivative

• It continuously calculates an error value as the difference between a desired setpoint and a measured process variable

• The controller then adjusts the output to minimize the error

• Proportional control responds to the current error, integral control responds to the error over time...read more
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Q3. Where do you see yourself in next 5 years
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Q4. What is transistor its use and working
Ans. 
Transistor is a semiconductor device used for amplification and switching of electronic signals.
• Transistor is made up of three layers of semiconductor material - P-type, N-type, and P-type.

• It has three terminals - emitter, base, and collector.

• Transistor can be used as an amplifier to increase the strength of a weak signal.

• It can also be used as a switch to turn a circuit on or off.

• Transistors are used in various electr...read more
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Q5. Projects related questions
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Q1. What is VFD in Induction Motor
Ans. 
VFD stands for Variable Frequency Drive which is used to control the speed of an induction motor.
• VFD is an electronic device that controls the frequency and voltage supplied to an induction motor.

• It can be used to vary the speed of the motor as per the requirement.

• VFDs are commonly used in industries to save energy and improve efficiency.

• They can also be used to reduce mechanical stress on the motor and increase its li...read more
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Q2. Types of Induction Motor
Ans. 
There are two main types of induction motors: squirrel cage induction motors and wound rotor induction motors.
• Squirrel cage induction motors have a simple and robust construction, with a rotor consisting of bars shorted at both ends.

• Wound rotor induction motors have a rotor with three windings connected to slip rings, allowing external resistors to be connected for improved control.

• Other types of induction motors inclu...read more
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Q3. Types of Capacitors and Dielectric
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Capacitors are electronic components that store energy in an electric field. There are different types of capacitors based on their dielectric material.
• Types of capacitors include ceramic, electrolytic, tantalum, film, and paper capacitors.

• Dielectric materials used in capacitors include ceramic, aluminum oxide, tantalum pentoxide, polyester, and polypropylene.

• Ceramic capacitors are commonly used in high-frequency circu...read more
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Q4. Power Systems basics
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Q1. Tell me about yourself
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Q2. How your friends will describe you in one word
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It included basics of physics mathematics and few quant questions

Q1. JCI have 2 rounds of interview L1 and LA L1 is basic technical round includes a strong introduction of yourself and deep knowledge of projects you have worked on (if related to automation) basics on the su...read more
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Q1. L2 was deep technical interview wherein they focus on the pratical knowledge of industry more over on sensors, building and industrial automation
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