BEFORE GIVING ANY PSU INTERVIEW I SEARCHED A LOT FOR THE QUESTIONS ASKED BUT I ALWAYS GOT INSUFFICIENT QUESTIONS. SO THIS IS MY ATTEMPT TO BRING YOU PERSONALLY EXPERIENCED QUESTIONS. I ALWAYS UPDATE IT BY GATHERING INFORMATION FROM FRIENDS TOO.

SO DO COMMENT AND FOLLOW ME FOR MORE EXPERIENCES AND VARIOUS INFORMATION.

DRDO INTERVIEW (JRF)

Saturday, December 29, 2018

⏩DRDO CVRDE ( Combat Vehicle Research and Development Establishment), Chennai.


Interview Date: 30th Sept 2018. (JRF).
 First of all, they have taken an exam, around 500 people were applied for the JRF post for a total of 14 vacancies of all three branches i.e. ECE, MECH, E&E.
  It was a tough exam because we have to solve 40 questions in 30 minutes all were logical and GATE level questions(neg marking). I could solve only 22. I was not sure that I will crack the exam. We were asked to wait for one hour in auditorium hall showing videos of ARJUN TANK and Indian AIR FORCE skills. After one and half hour they displayed the result on the projector. I literally bounced in the chair by seeing my name on the screen.
   They selected a total of 75 people for interview 25 out of them were of ECE branch. 
Interview started. It was the panel of 5 members.

1. What is the frequency range of A.M.?

Actually, I haven't got in which perspective he wanted to ask, I was not confident with the answer still I guessed "10 kHz". 
I suggest you don't do this mistake.
He again asked are you sure, I said yes.

2. What is the use of optocoupler?

I said," to connect the ckt optically but not electrically i.e. electrically isolated and optically connected.

3. What is the use of relay?

" Used to connect two ckts, high voltage, and low voltage. It's working is also same as optocoupler an isolator.

4. What are your fav subjects?

EDC, digital, controls.

5. Tell me the use of bypass capacitor?

I told EDC but they started asking questions of analog, unfortunately, I was not prepared with analog. I told the general use of capacitor i.e. allows ac blocks dc. According to me, I was correct because wherever you connect capacitor it does it's work. But they were not satisfied with answers.

6. Draw buffer using Opamp?

I drew.

7. Draw Ex-or gate truth table?

I drew.

8. Given one mux problem and asked to find o/p.

I drew correctly.

9. What is the breakdown voltage of germanium and silicon diode?

"0.72 for germanium and 1.21 for silicon". I was wrong bcoz they asked me breakdown vtg but I told energy band gap.

If you give 2-3 answers wrong they will say thank you automatically, you have to walk out. Same happened to me.


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