Bhabha Atomic Research Centre ( BARC )

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Bhabha Atomic Research Centre ( BARC ) Interview questions


Bhabha Atomic Research Centre ( BARC ) Na interview

Anne Siva RamaExperiencedSelected
I Applied for job through Referral for Na role at Bhabha Atomic Research Centre ( BARC )
Interview Process
Technical Interview
Round 1

Technical Interview

Interview Questions
  • Question 1: which ARM processor used?
  • Question 2: what is the main difference between ARM and ordinary controller?
  • Question 3: main differnce between RISC and CISC?
  • Question 4: explain about the pipeline structure in ARM?
  • Question 5: . draw the 3stage pipeline of ARM controller and how each instruction get executed in one cycle?
  • Question 6: What is the main aim of RISC other than fast exectuion?
  • Question 7: what do u mean by POWER PC?
  • Question 8: ARM is having how many modes of operation?
  • Question 9: whether 16 bit is best or 32 bit mode is best? if so why it is best?
  • Question 10: main advantage of 16 bit compare to 32 bit after that main disadvantage?
  • Question 11: which CPLD u have used?
  • Question 12: main difference between CPLD and FPGA other than large macro cells advantage of FPGA?
  • Question 13: what RTOS used? RTX-51 tiny or full.
  • Question 14: RTOS significance and when u have to go for RTOS?
  • Question 15: when do u need semaphores and what kind of semaphores RTX-51 provided?
  • Question 16: write a code for mutex impl in RTX-51?
  • Question 17: How the mail boxes implemented in RTX-51, capacity of mail box and process used for sending mail ?
  • Question 18: what kernel consists?
  • Question 19: what kind of scheduling used and when can u configure scheduling time?
  • Question 20: two fast tasks having same priority how scheduling acts that time?
  • Question 21: typical scheduling time u have provided in ur project?
  • Question 22: synthesiser means what?
  • Question 23: how can u multiply the frequency not up convertion by mixer only multiplier?
  • Question 24: i drew the PLL multiplier mode of operation
  • Question 25: what is the output of the phase detector?
  • Question 26: why LPF is required in between PD and VCO?
  • Question 27: how phase synchronisation can lead to frequency stabilization?
  • Question 28: how many types of frquency dividers are there?
  • Question 29: what DDS chip is used in ur project? how it works?
  • Question 30: what is the memory capacity (ROM) in DDS chip for frequency map table?
  • Question 31: ok now forget about ur experience, can u design a amplifier with opamp.... after design can u prove it for gain relation?
  • Question 32: how virtual ground will come in picture between two terminals even then high input impedance?
  • Question 33: what are the typical values of resistors for gain of 10?
  • Question 34: whats the problem with low resistances?
  • Question 35: whats the problem with high resistances like 10M ohms and 100Mohms?
  • Question 36: what is the typical output sinking current of 741 Opamp?
  • Question 37: what is the limiting factor of low resistances?
  • Question 38: if i remove feedback resistor and put a capacitor there what happens how cicuit behaves?
  • Question 39: for a step input what is the output expected and why is it so? prove it with mathematics?
  • Question 40: what will happen if u connect a capacitor with ideal constant current source? what happens when resistor is there in between? how long it will charge?
  • Question 41: what do u mean by capacity? for 10micro farad capacitor what is the capacity?
  • Question 42: if u know the capacity how much is the energy? 50. what kind of energy?
  • Question 43: and if i connect a resistor and ground through a charged capacitor what j=kind of energy resistor consume?
  • Question 44: three not gates cascaded and first gate coneected to a 5v supply through a resistor what is the output?
  • Question 45: what is the frquency at which rate it oscillates?
  • Question 46: how will u control a 230V operated tube light through micro controller?
  • Question 47: what relay contains? how much power relay consumes?
  • Question 48: how much micro controller port can drive and sink?
  • Question 49: what buffer contains?
  • Question 50: what are the drivers available?
  • Question 51: what are the buffers used 74 series?
  • Question 52: how many TTL configurations are there?
  • Question 53: draw the totem pole TTL output configuration?
  • Question 54: what is the typical fan out of TTL?
  • Question 55: fan out is specified for driving capability then what happens in zero output conditions?
  • Question 56: if i use more than specified fan out what happens for 1 output and zero output? for zero out put what are the adverse effects?
  • Question 57: which spec will call for transistor sinking current?
  • Question 58: what happens if u allow more than specified sink current?
  • Question 59: what kind of malfunction u expect if transistor heat properly matched and is cooled with extra fan?
  • Question 60: what are the steps followed for the IV&V?
  • Question 61: what is the difference between V&V?
  • Question 62: when SRS come in to picture? either in Verification part or validation part? how do u validate?
  • Question 63: SRS and SDD how they are connceted?
  • Question 64: what kind of report do u prepare after completion of IV&V?
  • Question 65: have u done any root cause analysis?
  • Question 66: what kind of testing u do?
  • Question 67: what do u mean by regression testing?
  • Question 68: for black box testing you consider SRS or SDD?
  • Question 69: how many universities offers this course? what course material they have given to u? how much is the fees for your course? how u have studied with out classes? what are the labs do u have in each year?
Interview Experience
Actually my interview duration was about 1hour 45 minutes.

In between I went wrong with sudden analog questions it took some time to recover (only 15 minutes). I don't like this analog subject but what to do they did not asked my favourite subjects they them self started.

but later I could recover and answer well in remaining topics but I feel damage is damage. They did not give medical slip to me that too after discussing 10 minutes.

Bad luck but it was nice experience, all the best to all people who got selected.
Interview Tips
Being an experienced person they asked me about my working level knowledge.
They have not left the analog electronics part.

Skills Tested

  • Analog
  • ADC
  • Power
  • Microprocessor
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