Defence Research & Development Organisation
It contained 2 parts
PART 1 - pure technical 100 ques.
Part 2 - 50 Ques.
Part 1 was purely technical but I was hard 2 answer part 2 general Knowledge abt 20-25ques were from maths remaining from general.They collected the question paper back. Iam herewith attaching some of the questions that noted down at hall.
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?

Test for all is 3 hours 100
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.
Computer Organization---William Stallings,Morris Mano
Theory of Computation---Aho and Ullman
Compiler Design-----Ullman
Operating systems----Galvin
computer Networks----William Stallings
apart from these for apptitude and General Knowledge
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 site www.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.
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