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DRDO Placement Papers
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1) If 100ns is Memory Access Time & 125 microsecond is 1frame period. The
no. of line that can be supported in a Time Division 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 in dinner table such that every
member has different neighbor. This arrangement will last for how many
days.

4) 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

5) 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 retrieved from
controller before next byte arrives is lost. Then the maximum safe polling
interval is
a) 12
b) 12.33
c) 12.67
d) 32

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6) A hard disk has a rotation speed of 4500RPM. then the latency time is
a) .4
b) .6
c) .7
d) .9

7) Suppose all elements above the principal diagonal od n x n matrix 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

8) The minimum number of comparisons required to find the second smallest
element in a 1000 element array is
a) 1008
b) 1010
c) 1999
d) 2000

9) The internal path length of a Binary Tree with 10nodes is 25. The
external path length is
a) 25
b) 35
c) 40
d) 45

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10) Average No. of Comparisons required to sort 3 elements is
a) 2
b) 2.33
c) 2.67
d) 3

11) 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

12) What is Interface Control Information?

13) The minimum no. of Multiplications needed to compute x^768 is
a) 9
b) 10
c) 425
d) 767

14) Find values for a,b,c,d
c 1 1 1
0 a 1 b
_______
1 0 d 0

15)(967)basex = 321base9

PART II General 50 General Non-Technical[4 Options]
More than 20 questions were from Mathematics.

1) where the Mars Rover Landed?

2) In Which Day world Telecom Day Celebrated?

3) Laser is used for what?
a) Treatment of Cancer
b) Treatment of Eyes
c) Treatment of Heart
d) Treatment of Kidney

4) Which country is not a Member of SAARC
a) Bangladesh
b) Myanmar
c) Maldives
d) Nepal

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5) The New Biotechnology Software introduced by TCS is?

6) What is Wi Fi?

7) Which is the fastest Cruise Missile?

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