ISRO CS 2013

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Question 1

What is the right way to declare a copy constructor of a class if the name of the class is MyClass?

  • MyClass (constant MyClass *arg)

  • MyClass (constant MyClass &arg)

  • MyClass (MyClass arg)

  • MyClass (MyClass *arg)

Question 2

Which of the following strategy is employed for overcoming the priority inversion problem?

  • Temporarily raise the priority of lower priority level process

  • Have a fixed priority level scheme

  • Implement kernel pre-emption scheme

  • Allow lower priority process to complete its job

Question 3

The state of a process after it encounters an I/O instruction is

  • ready

  • blocked

  • idle

  • running

Question 4

A starvation free job scheduling policy guarantees that no job indefinitely waits for a service. Which of the following job scheduling policies is starvation free?

  • Priority queuing

  • Shortest Job First

  •  First Come First Served 

  • Round robin

Question 5

A CPU scheduling algorithm determines an order for the execution of its scheduled processes. Given 'n' processes to be scheduled on one processor, how many possible different schedules are there?

  • n

  • n2

  • n!

  • 2n

Question 6

Consider the following set of processes, with arrival times and the required CPU-burst times given in milliseconds. 

Process  Arrival Time  Burst Time
   P1        0             4
   P2        2             2
   P3        3             1

What is the sequence in which the processes are completed? Assume round robin scheduling with a time quantum of 2 milliseconds

  • P1, P2, P3

  • P2, P1, P3

  • P3, P2, P1

  • P2, P3, P1

Question 7

In the Ethernet, which field is actually added at the physical layer and is not part of the frame

  • preamble

  • CRC

  • address

  • location

Question 8

What will be the efficiency of a Stop and Wait protocol, if the transmission time for a frame is 20ns and the propagation time is 30ns?

  • 20%

  • 25%

  • 40%

  • 66%

Question 9

If the frame to be transmitted is 1101011011 and the CRC polynomial to be used for generating checksum is x4+ x + 1, then what is the transmitted frame?

  • 11010110111011

  • 11010110111101

  • 11010110111110

  • 11010110111001

Question 10

Ethernet layer-2 switch is a network element type which gives

  • different collision domain and same broadcast domain

  • different collision domain and different broadcast domain

  • same collision domain and same broadcast domain

  • same collision domain and different broadcast domain

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