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DRDO Interview Questions

Questions Answers Views Company eMail

what is the function of external oscillator in 8051 microcontroller

1 6071

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 5811

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

5114

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 5268

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……..

2227

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 9399

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 35635

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

What was the initial release date of magento?

What is inline style in css?

611

On closing a form name the methods which are invoked?

172

Why is powerpoint called powerpoint?

369

How does dispatch_once manages to run only once?

What is the purpose of a web form?

1007

Give me one example of a functional specification and explain what information we will get from that?

What are the components of dynamic html authoring?

873

Explain the working of basic rubber ink filler

950

How can we send the flat file data to different targets(which are also flat files) based on the name of flat file with out adding extra columns?

2182

Explain what is output redirection?

1195

What is a data definition language?

1126

What happens when converting big values to integers?

999

Is cryptography supported in node.js?

541

The physical layer service is a non-confirmed service. Assume that some bits of data are lost during transmission over physical media, which layer will detect the loss and take some remedial measures. Explain any one method clearly depicting how this operation is performed.

2721