DRDO 2009 Question Paper

DRDO was formed in 1958 from the amalgamation of the then already functioning Technical Development Establishment (TDEs) of the Indian Army and the Directorate of Technical Development & Production (DTDP) with the Defence Science Organisation (DSO). DRDO was then a small organisation with 10 establishments or laboratories. Over the years, it has grown multi-directionally in terms of the variety of subject disciplines

DRDO Question Pattern

Test for all is 3 hours 100 technical questions 25 GK and current affairs and 25 aptitude.
well there are several books available for preparing for DRDO.Any book which is prescribed for the GATE preparation would do sufficiently. Refer some good magazines like CSR, Manorama Year book for GK sample gk questions and R.S Agarwal

INTERVIEW
The interview is a cool one. 5-6 members' board very friendly.

You have to reach at least half an hour earlier and complete the filling of forms and other formalities.
You must be in formals with tie (guys) and gals sorry no info.
Should have a strong and attractive personality.
You will be seated in a big hall. Refreshments are provided.
If you don't bring the following certificates in original and in Xerox you will not be allowed to be interviewed. The certificates are SSLC, PDC / PUC / 12,BTech/BE provisional or original, all the mark lists from 10th to BTech,hall ticket ,interview call letter, course certificate from the college, ID card (passport, college ID or voters ID), two passport sized photographs and certificates of any extra curricular activities like paper presentation, project work etc etc…
Carry with you the reports of the project work and papers presented.
Have a good look into the prospectus of DRDO set 2003- Salary, post and things like that. Should have sound info about the different wings of DRDO. Refer the sitewww.drdo.org

Inside the room you will be seated in front of a board of members. Behind you will be a white board and a sketch pen will be handed over you. You will have to use the board to explain the answers.
The subjects that are hot favorites to the DRDO board – radar and navigational aids, satellite communication, antenna theory, digital, filters and microprocessors. (Sorry guys I have the info about ECE branch only).
There will be one minute warming questions in the beginning.
Question of general interest will be asked and they may ask to describe you. After that they will straight a way get into the tech interview. Don't expect any leniency from the super brains of India.
If they see that you are not capable of answering a subject they will stick on to that subject and fire you with a volley of questions until you yourself think that "I am really a fool". Then now abt the standard of question. They ask only basic questions. Questions are simple but twisted. You should be able to give innovative solutions to the problems they give you- after all it's a Scientist B post.

12 September 2008

1. Miss Universe 2008 is—
(A) Riyo Mori
(B) Dayana Mendoza
(C) Lisa Lazarus
(D) Simaran Kaur Mundii
(E) None of these

2. Who among the following has awarded UNESCO / Guillermo Cano world press freedom award for 2008 ?
(A) Anna Politkovskaya
(B) Amira Hass
(C) Raul Rivero
(D) Lydia Cacho Rebeiro
(E) None of these

3. The present Governor of Bihar is—
(A) R.L.Bhatia
(B) R.S.Gavai
(C) Buta Singh
(D) S.S.Sidhu
(E) None of these

4. India test-fired Nuclear Capable Agni III on May 7, 2008 for—
(A) Fourth time
(B) Second time
(C) Third time
(D) Fifth time
(E) None of these

5. Tenth century coins have been found from the city of—
(A) Guwahati
(B) Bareily
(C) Khandwa
(D) Ranchi
(E) None of these

6. The cyclone which struck Myanmar in May 2008 was—
(A) Willy-willy
(B) Nargis
(C) Fanoos
(D) Nasim
(E) None of these

7. The number of children, who are deprived of basic healthcare in India, as per the report—state of the World’s Mothers—brought out by global humanitarian organization ‘save the children’ is—
(A) 60 million
(B) 50 million
(C) 67 million
(D) 55 million
(E) None of these

8. The country where the system of two Supreme Courts has been proposed is—
(A) Pakistan
(B) Nepal
(C) Sri Lanka
(D) Bhutan
(E) None of these

9. Which of the following is not a member of the NATO ?
(A) Austria
(B) Poland
(C) Hungary
(D) Spain
(E) None of these

10. Who became Britain’s first Asian woman Lord Mayor ?
(A) Rekha Rani
(B) Anjula Sood
(C) Reshma Shah
(D) Kavita Sahni
(E) None of these

11. The newly elected President of Paragury is—
(A) Fernando De Silva
(B) Fernando Lugo
(C) Fernando Silvio
(D) Fernando Dominique
(E) None of these

12. Silvio Berlusconi was recently elected to the post of Prime Ministership of Italy. He belongs to—
(A) Italian Nationalist Party
(B) The Patriotic Alliance
(C) People’s Party of Italy
(D) People of Freedom Party
(E) None of these

13. PLA stands for—
(A) Party of Leninist Association
(B) People’s Liberation Army
(C) People for Liberal Alliance
(D) People for Left Alliance
(E) None of these

14. The number of African countries which attended the recently concluded India-Africa Forum Summit is—
(A) 14
(B) 15
(C) 16
(D) 17
(E) None of these

15. According to a recent survey which of India’s states has topped in rural electrification ?
(A) Maharashtra
(B) Tamil Nadu
(C) Rajasthan
(D) Karnataka
(E) None of these

16. Simran Kaur Mundi has been chosen—
(A) Miss India Earth 2008
(B) Miss India Universe 2008
(C) Miss India World 2008
(D) None of the above
(E) None of these

17. Which one of the following won Jawaharlal Nehru Award for International Understanding for 2007 ?
(A) Olafur Ragnar
(B) Javed Akhtar
(C) Luiz Lula da Silva
(D) The Milinda and Gates Foundation
(E) None of these

18. The book ‘Unaccustommed Earth’ is written by—
(A) P. M. Nayyar
(B) Shobha De
(C) Jhumpi Lahiri
(D) None of these
(E) None of these

19. The 2008 Edition of Wisden Cricketers’ Almanack–Crickets major annual reference work has named “The Leading Cricketer of the World for 2007”—
(A) Mc Grath
(B) Jacques Kallis
(C) Ricky Ponting
(D) Sachin Tendulkar
(E) None of these

20. India ranks …………… in foreign exchange forex reserve.
(A) Third
(B) Second
(C) Fifth
(D) Fourth
(E) None of these

21. Raghuram Rajan Committee is related to—
(A) Austerity in government expenditure
(B) Study of causes of rising prices
(C) Financial sector reforms
(D) Export-import balance
(E) None of these

22. The International Monetary Fund has estimated India’s contribution to World Gross Domestic Product in Purchasing Power Parity (PPP) terms for 2007 to—
(A) 4·6%
(B) 6·4%
(C) 7·1%
(D) 3·9%
(E) None of these

23. According to data released by the Ministry of Finance, currently the per capita debt on each of the roughly 110 crore Indians stands at—
(A) Rs. 71502
(B) Rs. 7218
(C) Rs. 10550
(D) Rs. 6103
(E) None of these

24. Which one of the three single cross improved hybrids of maize has not been developed and recommended for an All India level use by Chaudhry Charan Singh Haryana Agriculture University ?
(A) HPM–6
(B) HM–8
(C) HM–10
(D) HQPM–7
(E) None of these

25. US has decided to remove ………from its list of states sponsoring terrorism.
(A) Cuba
(B) Iraq
(C) North Korea
(D) Libya
(E) None of these

26. In the year 2006-07 India received Foreign Direct Investment Worth—
(A) $ 25 billion
(B) $ 24·5 billion
(C) $ 26·25 billion
(D) 20·5 billion
(E) None of these

27. For the first time, the T.V. Cameras and print cameramen were allowed to record proceedings of the Lok Adalats dispensing justice on—
(A) May 3, 2008
(B) May 5, 2008
(C) May 7, 2008
(D) May 4, 2008
(E) None of these

28. As a part of the partial solution to the world’s energy crisis, the scientists of which of the following countries are building a nuclear fusion laboratory designed to recreate the temperatures and pressure of an exploding star ?
(A) U.K.
(B) U.S.A.
(C) Australia
(D) France
(E) None of these

29. Recently, a fatal disease broke out in China infecting thousands of children and causing death of some of them. The disease was—
(A) Bird flu
(B) Filariasis
(C) Hand, mouth and foot disease
(D) Chicken pox
(E) None of these

30. Two Indian doctors from Kolhapur have achieved a path breaking success in the research of—
(A) Genetics
(B) Stem cell
(C) New protein structure
(D) Habit pattern of different people
(E) None of these

31. Apart from ISRO, three other agencies/institutions were also involved in the execution of PSLV-C9. Which of the following was not involved ?
(A) DRDO
(B) Antrix Corporation
(C) Cosmos International Germany
(D) University of Toronto, Canada
(E) None of these

32. The Iran-Pakistan-India gas pipeline, slated to begin in 2009 was conceptualised first in—
(A) 1991
(B) 1989
(C) 1985
(D) 1993
(E) None of these

33. In addition to Kolkata and Delhi, the Union Government plans to start Metro rail service in four more cities. Which of the following is not included in the plan ?
(A) Kochi
(B) Hyderabad
(C) Pune
(D) Chennai
(E) None of these

34. President Pratibha Patil recently visited Chile, Brazil and Mexico. During her trip, with which of the following countries did India sign an extradition treaty—
(A) Brazil
(B) Chile
(C) Mexico
(D) None of these
(E) None of these

34. President Pratibha Patil recently visited Chile, Brazil and Mexico. During her trip, with which of the following countries did India sign an extradition treaty—
(A) Brazil
(B) Chile
(C) Mexico
(D) None of these
(E) None of these

35. The winner of the 2008 Wimbledon Open Tennis Tournament men's single title is -
(A) Roger Federer
(B) Andy Roddick
(C) Novak Djokovic
(D) Rafael Nadal
(E) None of these

Sample Paper

1. If 100ns is Memory Access Time & 125 microsec is 1frame period. The no. of line that can be supported in a Time Divison Switch is

a)125 Lines

b)625 Lines

c)525 Lines

d)465 Lines

2. The no. of edjes in disjoint Hamilton circuit in a complex graph with 17 edges is

a) 8

b) 9

c) 136

d) 17^2

3. 15 persons in a club sit every day ina dinner table such that every member has different neighbour. This arrangement will last for how many days.
Assume a system has 16MB cache mean Disk Access Time & cache Access time is 76.5 ns & 1.5 overall mean Access time us 465ms for each tripling the memory the miss rate is halved. The memory required to bring down the mean Access time to 24ns is

a) 16 MB

b) 24 MB

c) 32 MB

d) 48 MB

4.Average transfer speed of a i/p serial line is minimum 25,000 Bytes & maximum 60000 Bytes. Polling Strategy adopted takes 4microsec(whether there is any i/p byte or not). It is assured that byte that retrived from controller before next byte arrives are lost. Then the maximum safe polling interveal is

a) 12

b) 12.33

c) 12.67

d) 32

5. A harddisk has a rotation speed of 4500RPM. then the latency time is

a) .4

b) .6

c) .7

d) .9

6.Suppose all elements above the principal diagonal od n x n matix A are zero. If non zero elements of the lower triangular Matrix is stored in an array B with A[1][1] stored at

B[1]. The addressing formula to the nonzero element in A[i][j]=?

a) A[i][j]

b) i(j-1)/2 +i

c) j(i-1)/2 +i

d) i(i-1)/2 +j

7.The minumum number of comparisons requied to find the second smallest element in a 1000 element array is

a) 1008

b) 1010

c) 1999

d) 2000

8.The internal path length of a Bonary Tree with 10nodes is 25. The external path length is

a) 25

b) 35

c) 40

d) 45

9.Average No. of Comparisons required to sort 3 elements is

a) 2

b) 2.33

c) 2.67

d) 3

10.In a switch the mean arrival rate of packets is 800 Packets/sec and the the mean service rate is 925 Packets/sec

a) .008 Sec

b) .08 sec

c) .8 sec

d) 1.1 sec

11. What is Interface Control Information?

12. The minumum no. of Multiplications needed to compute x^768 is

a) 9

b) 10

c) 425

d) 767

13. Find values for a,b,c,d

c 1 1 1

0 a 1 b

_______

1 0 d 0

(967)basex = 321base9

PART II Genreal 50 General Non-Technical[4 Options]

14. The area of red planet where the Mars Rover Landed? In Which Day world Telecom Day Celebrated? Laser is used for what?

a) Treatment of Cancer

b) Treatment of Eyes

c) Treatment of Heart

d) Treatment of Kidney

15.Which country is not a Member of SAARC

a) Bangladesh

b) Myanmar

c) Maldives

d) Nepal

The New Biotechnology Software intorduced by TCS is?

16.The New Biotechnology Software intorduced by TCS is? What is Wi Fi?

17.Which is the fastest Cruise Missile?

1) Coldest planet:Pluto
2) INS Shivali is the first:
3) Which one of the following was NOT indegineously developed?:Prithvi/Akash/Agni
4) Full form of SARS
5) Anthrax is a :Virus/Bacteria/.../...
6) Dakshina Gangothri is:Ganga's origin/Indian camp @ antartica/.../...
7) Which of the following is a chemical weapon:Mustard Gas/Marsh Gas/.../...
8) A question based on Coding and Decoding
9) Another question similar to above
10) Question on series completion
11) Another series completion question
12) Where is Institute of Forensic Science?:Hyderabad
13) A G.K question based on X and Y chromosomes in males and females

Sample technical questions asked in test last year in CSE :

1) Banker's algorithm is used for: Deadlock Avoidance
2) A LOT of questions were based on generating strings from a given grammar.
3) A circle(dot) shown in the PCB is:Vcc/Grnd/Pin 1/Pin 14
4) Program Segment Prefix in MS-DOS 5.0 is:
5) Some IP addresses were given and the question was to select the private addess from it(?)
6) 10Base2 and 10Base5 wires refers to:
7) A question on sliding-window protocol
8) Which of the following require a driver?:disk/cache/ram/cpu
9) A LOT of mathematical questions which were asked from calculus,trigonometry...

The questions asked in ECE were mainly from Control Systems, Communications

EMT and microprocessor
Make sure that u know the fundas of microprocessors useful in interview also: see if u know these questions
1. Which type of architecture 8085 has?
2. How many memory locations can be addressed by a microprocessor with 14 address lines?
3. 8085 is how many bit microprocessor?
4. Why is data bus bi-directional?
5. What is the function of accumulator?
6. What is flag, bus?
7. What are tri-state devices and why they are essential in a bus oriented system?
8. Why are program counter and stack pointer 16-bit registers?
9. What does it mean by embedded system?
10. What are the different addressing modes in 8085?
11.What is the difference between MOV and MVI?
12. What are the functions of RIM, SIM, IN?
13. What is the immediate addressing mode?
14. What are the different flags in 8085?
15. What happens during DMA transfer?
16. What do you mean by wait state? What is its need?
17. What is PSW?
18. What is ALE? Explain the functions of ALE in 8085.
19. What is a program counter? What is its use?
20. What is an interrupt?
21. Which line will be activated when an output device require attention from CPU?

Then comes the interview questions asked in ECE interview were fundamental.Qustions asked in my interview were:
Director

1. Which college and university are you coming from?
2. Did you appear for GATE? Why are you not interested in higher studies?
3. Did you appear for IES?
4. Did you appear for any other board interview of public sector?
5. The subjects you have learned in college can be divided into three- basic electronics, communi-cation and digital logic. Tell me any five subjects you like.
(I told radar and navigational aids, electronic warfare, satellite communication, biomedical instrumentation, fuzzy electronics and basic digital electronics as my subjects)

Board member1 (QUESTION LEVEL- MODERATE)

1. Write the truth table for full adder and implement it in NAND gate only.
2. What's the difference between looping 0s and 1s in K map?
3. Difference between microprocessor and micro controller
4. Microprocessors you are familiar with
5. How will you send and receive data to a micro-processor? (One method is I/O mapped I/O which is the other one?)
6. Radar range equation?
7. Does the radar range depend upon the frequency of the signal transmitted?
8. What is Doppler shift? What is its importance?

BOARD MEMBER -2 QUESTION LEVEL- TOUGH)

1. I will make two fuzzy statements. Pencil is long. Table is long. What is the term long signify?
2. What is a membership function?
3. What are the design criteria for very low frequency amplifier?
4. Can you measure distance with the help of CW radar? If so how?
5. How will you design a stable oscillator? (Not with crystal oscillator because temperature affects it)
6. You have designed an amplifier. After few days it is found that its gain have changed. What might be the reason?

BOARD MEMBER-3 (QUESTION LEVEL- MODERATE)

1. A plane is moving in a circular path around the transmitter of the radar. Will there be Doppler shift detected in the radar?
2. State Keplers laws
3. Why there is more geo synchronous satellite?
4. The angular difference between two satellites is 2 degree. What is the maximum number of satellites needed to cover the whole earth?
5. What is the minimum number of satellites needed to cover the whole earth?

BOARD MEMBER-4 QUESTION LEVEL- MODERATE)

1. Which is the law of conservation involved in the second of Keplers?
2. Why do you explain elliptical orbit while stating Kepler's law? Why not circular orbit?
3. What are the advantages of optical communication?
4. What are the invasive and non-invasive methods of instrumentation?

For CS guys they started with this question: What is a key board? Where u will connec? What will happen if you press the keys?..
For maths guys they asked some questions on series.. I don't know muchSome guys were selected just by describing the final year project.


1. How can you design a phase detector using a XOR gate?
2. Questions abt differentiator and integrator. What will happen if we increase/decrease the values of R/C?
3. how will a low/high pass filters behave to different signals –ramp, pulse etc
4. questions on flip flops
5. Johnson counter
6. Questions on microprocessors- what is SIM?
7. Abt your project. What will happen when this/that happens to your project?
8. Radar, antenna and satellite communication.
9. Which is the first/latest communication satellite?
10. What is apogee /perigee?

For electronics branch the technical questions include –
- From networks (in all 10-12 questions), some simple circuits were given and current-voltage in some branch was asked.
- On wye-delta formula
- Question on graphs, cut set matrix etc.
- On maximum power transfer theorem and superposition principle.
- From electron devices (in all 4-5 questions), on JFET pinch off voltage formula
- P-well fabrication process
- PIN diode
- Mobility of electron and proton
- From analog (in all 9-10 questions), to find output of a subtractor opamp circuit
- Some diode circuit was given and asked which diode is on and off and the net voltage at output.
- On opamp integrator circuit output.
- From digital (in all 9-10 questions), to find 2’s complement.
- One Boolean function was given for reducing.
- On properties of logic families like which family among following has maximum propagation delay etc..
- On resolution formula of ADC-DAC’s
- About interrupts in microprocessors, like which one is level or edge triggered.
- No program was given to find output but something was asked about 1 command.
- From signals and systems (in all 7-8 questions), formula based question to find transforms.
- Some function was given and was asked to find whether it is causal, time-variant, linear etc or not.
- From control systems (in all 7-8 questions), 1 on PID controller equation.
- 1 function was given and its signal flow graph was asked.
- On root loci angle formula.
- To find electrical analogue of given mechanical elements, match the column type.
- From communication (in all 9-10 questions), some on mean, power spectral density, probability density function etc…
- To find image frequency in super-heterodyne receiver.
- On SNR.
- 1 to find entropy with given probabilities.
- 1 on GSM.
- From electromagnetics (in all 7-8 questions), on divergence theorem.
- 1 on integral form of Maxwell’s equation, we have to choose wrong one out
- Some on plane waves between 2 media.
- Single and multi mode index fiber
- On antenna, to find radiation pattern of given dipole etc.

The questions were mostly formula based and do not require much calculations. The reasoning question includes current affairs, about DRDO products, 10-12th mathematics, English, diagrammatic questions etc….. Some are-
- Where is Sarnath located? Ans- Varanasi (U.P.)
- When was DRDO established? Ans- 1954

- SAMYUKTA is used by whom army, navy or air force? Ans- Army
- HUMSA is used for.
- About 1 type of pea which DRDO has introduced.
- Acrophobia is the fear from what? Ans- Heights
- To find particular solution of given differential equation.
- On A.P., G.P. formula.
- Some on complex numbers.
- Some 4-5 words were given and was asked to find out how many are spelt incorrectly.
- Some questions were to find out punctuation and grammatical errors.
- Some figures were given and rotated in some direction. We have to complete the sequence. Nearly 6-7 questions were there on such spatial reasoning.

1. Which type of architecture 8085 has?

2. How many memory locations can be addressed by a microprocessor with 14 address lines?

3. 8085 is how many bit microprocessor?

4. Why is data bus bi-directional?

5. What is the function of accumulator?

6. What is flag, bus?

7. What are tri-state devices and why they are essential in a bus oriented system?

8. Why are program counter and stack pointer 16-bit registers?

9. What does it mean by embedded system?

10. What are the different addressing modes in 8085?

11.What is the difference between MOV and MVI?

12. What are the functions of RIM, SIM, IN?

13. What is the immediate addressing mode?

14. What are the different flags in 8085?

15. What happens during DMA transfer?

16. What do you mean by wait state? What is its need?

17. What is PSW?

18. What is ALE? Explain the functions of ALE in 8085.

19. What is a program counter? What is its use?

20. What is an interrupt?

21. Which line will be activated when an output device require attention from CPU?

Test for all is 3 hours 100 technical separate for each group and 50 gk and aptitude questions same for all!
Then comes the interview questions asked in ECE interview were fundamental.
Qustions asked in my interview were:
Director

1. Which college and university are you coming from?

2. Did you appear for GATE? Why are you not interested in higher studies?

3. Did you appear for IES?

4. Did you appear for any other board interview of public sector?

5. The subjects you have learned in college can be divided into three- basic electronics, communi-cation and digital logic. Tell me any five subjects you like.

(I told radar and navigational aids, electronic warfare, satellite communication, biomedical instrumentation, fuzzy electronics and basic digital electronics as my subjects)



Board member1 (QUESTION LEVEL- MODERATE)

1. Write the truth table for full adder and implement it in NAND gate only.

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

3. Difference between microprocessor and micro controller

4. Microprocessors you are familiar with

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

6. Radar range equation?

7. Does the radar range depend upon the frequency of the signal transmitted?

8. What is Doppler shift? What is its importance?



BOARD MEMBER -2 QUESTION LEVEL- TOUGH)

1. I will make two fuzzy statements. Pencil is long. Table is long. What is the term long signify?

2. What is a membership function?

3. What are the design criteria for very low frequency amplifier?

4. Can you measure distance with the help of CW radar? If so how?

5. How will you design a stable oscillator? (Not with crystal oscillator because temperature affects it)

6. You have designed an amplifier. After few days it is found that its gain have changed. What might be the reason?

BOARD MEMBER-3 (QUESTION LEVEL- MODERATE)

1. A plane is moving in a circular path around the transmitter of the radar. Will there be Doppler shift detected in the radar?

2. State Keplers laws

3. Why there is more geo synchronous satellite?

4. The angular difference between two satellites is 2 degree. What is the maximum number of satellites needed to cover the whole earth?

5. What is the minimum number of satellites needed to cover the whole earth?


BOARD MEMBER-4 QUESTION LEVEL- MODERATE)

1. Which is the law of conservation involved in the second of Keplers?

2. Why do you explain elliptical orbit while stating Kepler's law? Why not circular orbit?

3. What are the advantages of optical communication?

4. What are the invasive and non-invasive methods of instrumentation?

For CS guys they started with this question: What is a key board? Where u will connec? What will happen if you press the keys?..
For maths guys they asked some questions on series.. I don't know muchSome guys were selected just by describing the final year project.
Sample questions asked in ISRO board (ECE)

1) How does a satellite communication work?

2) Why numerical methods used in research?

3) Hell lot of questions in TV engineering like horizontal and vertical frequencies, what will happen if they are reversed, interlaced scanning, PAL and some other questions.

4) Basic digital questions

5) Basic communications like SSB, AM, FM, VSB and what will happen if AM and FM is interchanged in TV transmission.

6) Some questions on project.

Main model of technical question in exam are

Direct theory question.

Direct numerical problem.

Indirect theory and numerical problem.

Graph based questions.

Assertion and reasoning type

Block diagram based (control theory)

1. Which type of architecture 8085 has?

2. How many memory locations can be addressed by a microprocessor with 14 address lines?

3. 8085 is how many bit microprocessor?

4. Why is data bus bi-directional?

5. What is the function of accumulator?

6. What is flag, bus?

7. What are tri-state devices and why they are essential in a bus oriented system?

8. Why are program counter and stack pointer 16-bit registers?

9. What does it mean by embedded system?

10. What are the different addressing modes in 8085?

11.What is the difference between MOV and MVI?

12. What are the functions of RIM, SIM, IN?

13. What is the immediate addressing mode?

14. What are the different flags in 8085?

15. What happens during DMA transfer?

16. What do you mean by wait state? What is its need?

17. What is PSW?

18. What is ALE? Explain the functions of ALE in 8085.

19. What is a program counter? What is its use?

20. What is an interrupt?

21. Which line will be activated when an output device require attention from CPU?

Test for all is 3 hours 100 technical separate for each group and 50 gk and aptitude questions same for all!
Then comes the interview questions asked in ECE interview were fundamental.
Qustions asked in my interview were:
Director

1. Which college and university are you coming from?

2. Did you appear for GATE? Why are you not interested in higher studies?

3. Did you appear for IES?

4. Did you appear for any other board interview of public sector?

5. The subjects you have learned in college can be divided into three- basic electronics, communi-cation and digital logic. Tell me any five subjects you like.

(I told radar and navigational aids, electronic warfare, satellite communication, biomedical instrumentation, fuzzy electronics and basic digital electronics as my subjects)



Board member1 (QUESTION LEVEL- MODERATE)

1. Write the truth table for full adder and implement it in NAND gate only.

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

3. Difference between microprocessor and micro controller

4. Microprocessors you are familiar with

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

6. Radar range equation?

7. Does the radar range depend upon the frequency of the signal transmitted?

8. What is Doppler shift? What is its importance?



BOARD MEMBER -2 QUESTION LEVEL- TOUGH)

1. I will make two fuzzy statements. Pencil is long. Table is long. What is the term long signify?
2. What is a membership function?
3. What are the design criteria for very low frequency amplifier?
4. Can you measure distance with the help of CW radar? If so how?
5. How will you design a stable oscillator? (Not with crystal oscillator because temperature affects it)
6. You have designed an amplifier. After few days it is found that its gain have changed. What might be the reason?

BOARD MEMBER-3 (QUESTION LEVEL- MODERATE)

1. A plane is moving in a circular path around the transmitter of the radar. Will there be Doppler shift detected in the radar?
2. State Keplers laws
3. Why there is more geo synchronous satellite?
4. The angular difference between two satellites is 2 degree. What is the maximum number of satellites needed to cover the whole earth?
5. What is the minimum number of satellites needed to cover the whole earth?

BOARD MEMBER-4 QUESTION LEVEL- MODERATE)

1. Which is the law of conservation involved in the second of Keplers?
2. Why do you explain elliptical orbit while stating Kepler's law? Why not circular orbit?
3. What are the advantages of optical communication?
4. What are the invasive and non-invasive methods of instrumentation?
For CS guys they started with this question: What is a key board? Where u will connec? What will happen if you press the keys?..
For maths guys they asked some questions on series.. I don't know muchSome guys were selected just by describing the final year project.
Sample questions asked in ISRO board (ECE)

1) How does a satellite communication work?
2) Why numerical methods used in research?
3) Hell lot of questions in TV engineering like horizontal and vertical frequencies, what will happen if they are reversed, interlaced scanning, PAL and some other questions.
4) Basic digital questions
5) Basic communications like SSB, AM, FM, VSB and what will happen if AM and FM is interchanged in TV transmission.
6) Some questions on project.
Main model of technical question in exam are Direct theory question.
Direct numerical problem.
Indirect theory and numerical problem.
Graph based questions.
Assertion and reasoning type
Block diagram based (control theory)