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March 20th, 2017, 12:27 PM
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Join Date: Mar 2012
Re: Interview Questions for ISRO Assistant

Some questions for preparation of ISRO (Indian Space Research Organisation) Interview section for recruitment are as follows:

1. Tell me about yourself:

2. What do you know about this organization?

3. If you had enough money to retire right now, would you?

4. What would you like to be doing five years from now?

5. Describe your management style.

6. Describe your work ethic.

7. What is more important to you: the money or the work?

8. What has disappointed you about a job?

9. What kind of salary do you need?

10. Do you have any questions for me?

Technical Interview Questions:

1. What do you mean by 3 dB cutoff frequency? Why is it 3 dB, not 1 dB?

2. What is the need for modulation?

3. What is EDFA ?

4. What is meant by pre-emphasis and de-emphasis?

5. What is Race-around problem? How can you rectify it?

6. What is CMRR? Explain briefly.

7. Difference between FM and AM, which is preferred & its advantages.

8. For asynchronous transmission, is it necessary to supply some synchronizing pulses additionally or to supply or to supply start and stop bit?

9. Questions on signal processing techniques ?

10. What is VOIP ?

11. On what principle do Transformers work ?

12. BPFSK is more efficient than BFSK in presence of noise. Why?

13. What is ZigBee and its specifications ?

14. Questions on different coding techniques ?

15. What is latest satellite from ISRO ?

16. In electrical we have heard a lot about transmission loss why it is caused? Can we prevent it ?

17. In Computer you know methods of sorting? Which is the most efficient and why?

18. In Physics do you know what is the cause of hall effect?

Some Other Questions

Q) What is race around condition ? Why it occurs ? How it can be avoided ?
Q) What is Nyquist sampling theorem ? If it will not be satisfied for a communication system what will happen ?
Q) What is fan-out ? What is the mathematical formula to calculate fan-out ?
Q) Describe the process of amplitude modulation ? What is modulation depth ?
Q) What is tri-state logic inverter ? Explain with the help of truth table ?
Q) Draw the equivalent circuit of a microwave transmission line. What do you mean by characteristic impedance and what is its value for a loss less transmission line ?
Q) What do you mean by the terms LEO, GEO and MEO with respect to satellite communication ?
Q) What is Fourier transform ? Why and when it is needed ?
Q) What are the different types of techniques available for error detection and correction in digital communication ?
Q) How can you implement a full subtractor with the help of half subtractors ?
Q) What do you mean by input bias current in op-amp ? How to mitigate this problem?
Q) What is the need of pre-emphasis in communication system ?
Q) What is common mode rejection ratio ? How it is measured and what is its unit ?
Q) What is Q factor of a parallel RLC circuit ? What is the significance of Q factor ?
Q) What is voltage standing wave ratio ? If VSWR=1 then what does it signifies ?
Q) What do you mean by dominant mode of waveguide ? What are the dominant modes of circular and rectangular waveguides ?
Q) Which type of waveguides do not allow TEM modes and why ?


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