DRDO previous year question paper

What is the Maximum clock frequency in 8086?
5 Mhz
What is Jitter?
Differentiate between static response and dynamic response?
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
Explain noise margin in Amplifiers?
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
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
What are different types of micro processor architectures?
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
Expand CPLD and FPGA.
A harddisk has a rotation speed of 4500RPM. then the latency time is
a) .4
b) .6
c) .7
d) .9
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
The minumum number of comparisons required to find the second smallest element in a 1000
element array is
a) 1008
b) 1010
c) 1999
d) 2000
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
Average No. of Comparisons required to sort 3 elements is
a) 2
b) 2.33
c) 2.67
d) 3
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
What is Interface Control Information?
Expand HCMOS?
ans.High-density n- type Complimentary Metal Oxide Silicon field effect transistor.
The minumum no. of Multiplications needed to compute x^768 is
a) 9
b) 10
c) 425
d) 767
Give examples for Maskable interrupts?
ans.RST 7.5, RST6.5, RST5.5 are Maskable interrupts
Which of the following require a driver?
Disk
Cache
RAM
CPU
Explain the 4 segments of IP addresses.