ISRO CSE 2011

Question 1
The encoding technique used to transmit the signal in giga ethernet technology over fiber optic medium is
A
Differential Manchester encoding
B
Non return to zero
C
4B/5B encoding
D
8B/10B encoding
Computer Network   Physical Layer
Question 2
Which of the following is an unsupervised neural network?
A
RBS
B
Hopfield
C
Back propagation
D
Kohonen
   
Question 3
In compiler terminology reduction in strength means
A
Replacing run time computation by compile time computation
B
Removing loop invariant computation
C
Removing common subexpressions
D
replacing a costly operation by a relatively cheaper one
Compiler Design   Runtime Environment
Question 4
The following table shows the processes in the ready queue and time required for each process for completing its job.

\begin{array}{ll} \text { Process } & \text { Time } \\ P_{1} & 10 \\ P_{2} & 5 \\ P_{3} & 20 \\ P_{4} & 8 \\ P_{5} & 15 \end{array}

If round-robin scheduling with 5 ms is used what is the average waiting time of the processes in the queue?
A
27 ms
B
26.2 ms
C
27.5 ms
D
27.2 ms
Operating System   CPU Scheduling
Question 5
MOV [BX], AL type of data addressing is called ?
A
register
B
immediate
C
register indirect
D
register relative
Computer Organization   Addressing Modes
Question 6
Evaluate (X xor Y) xor Y?
A
All 1's
B
All 0's
C
X
D
Y
Digital Logic   Boolean Algebra
Question 7
Which of the following is true about z-buffer algorithm?
A
It is a depth sort algorithm
B
No limitation on total number of objects
C
Comparisons of objects is done
D
z-buffer is initialized to background colour at start of algorithm
   
Question 8
What is the decimal value of the floating-point number C1D00000 (hexadecimal notation)? (Assume 32-bit, single precision floating point IEEE representation)
A
28
B
-15
C
-26
D
-28
Digital Logic   Number System
Question 9
What is the raw throughput of USB 2.0 technology?
A
480 Mbps
B
400 Mbps
C
200 Mbps
D
12 Mbps
   
Question 10
Below is the precedence graph for a set of tasks to be executed on a parallel processing system S.

What is the efficiency of this precedence graph on S if each of the tasks T_1, \dots, T_8 takes the same time and the system S has five processors?
A
25%
B
40%
C
50%
D
90%
Operating System   CPU Scheduling
There are 10 questions to complete.

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