# 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 1 Explanation:
 Question 2
Which of the following is an unsupervised neural network?
 A RBS B Hopfield C Back propagation D Kohonen

Question 2 Explanation:
 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 3 Explanation:
 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 4 Explanation:
 Question 5
MOV [BX], AL type of data addressing is called ?
 A register B immediate C register indirect D register relative
Question 5 Explanation:
 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 6 Explanation:
 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 7 Explanation:
 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 8 Explanation:
 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 9 Explanation:
 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
Question 10 Explanation:
There are 10 questions to complete.