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DRDO Interview Questions

Questions Answers Views Company eMail

what is the function of external oscillator in 8051 microcontroller

1 6072

IN AN OSCILLOSCOPE TWO COUPLING IS THERE, THAT IS AC & DC COUPLING, WHERE DO WE USE THESE COUPLINGS ?

2 6664

how write a addtion of two single dimensional array using of pointer in c language?

3 5812

What's the difference between looping 0s and 1s in K map?

5115

How will you send and receive data to a micro-processor? (One method is I/O mapped I/O which is the other one?)

1 5269

What is D-FF? What is the basic difference between Latches and Flip flops? What is a multiplexer? How can you convert an SR Flip-flop to a JK Flip-flop? How can you convert an JK Flip-flop to a D Flip-flop? What is Race-around problem? How can you rectify it? Which semiconductor device is used as a voltage regulator and why? Explain an ideal voltage source? Explain zener breakdown and avalanche breakdown? What are the different types of filters? What is the need of filtering ideal response of filters and actual response of filters? What is sampling theorem? What is impulse response? Explain the advantages and disadvantages of FIR filters compared to IIR counterparts. What is CMRR? Explain half-duplex and full-duplex communication? Which range of signals is used for terrestrial transmission? Why is there need for modulation? Which type of modulation is used in TV transmission? Why we use vestigial side band (VSB-C3F) transmission for picture? When transmitting digital signals is it necessary to transmit some harmonics in addition to fundamental frequency? For asynchronous transmission, is it necessary to supply some synchronizing pulses additionally or to supply or to supply start and stop bit? BPFSK is more efficient than BFSK in presence of noise. Why? What is meant by pre-emphasis and de-emphasis? Explain 3 dB cutoff frequency? Why is it 3 dB, not 1 dB? Explain ASCII, EBCDIC?

3 10431

Difference between shock and vibration isolator

2 12766

I have attended Scientist Entry Test on 7th Sep. Hereby I am submitting paper for Electronics and Communication branch…….. Hope it helps future aspirants……..

2228

WHAT ARE THE BELT HORMONICS IN AC MACHINE HOW TO REDUCE IT

2 5096

WHAT TYPE OF QUESTION ASK FOR POST SENIOR TECHNICAL ASSISTANT IN DRDO

8088

if u give d.c. supply to transformer primary then what happen.&why??????????????

4 9400

Who was the father of Chander Gupt Morya?

2 6445

If 5+3+2=151012, 5+4+5=202504, 7+2+5=143542 then 8+6+2= ?

21 35636

what is fili flop ?

3 7352

In simply words(not explain any formula )what do you mean by power factor.?

5 7811

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Un-Answered Questions

How do I do transactions/locking in mongodb?

Fact table is in normalized or de-normalized form?

962

What are the different types of recovery operation?

1026

What is the difference between system controlled and user controlled pick, pack and pass of goods?

813

What is conversion routine?

frnz.... how to get into the navratna companies , plz do help me!!!

2484

Who created python?

835

Does windows update need internet connection?

744

What is the render method?

710

What is time liability?

1035

What are the major challenges you faced while creating the rpd?

870

How do I uninstall windows operating system?

846

At present who is the prime minister of India?

1031

You have a tab delimited file called phonenos and want to change each tab to four spaces. What command can you use to accomplish this?

1059

Describe life cycle of thread?

985