ISRO CS 2008

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Question 1

With Round-Robin CPU scheduling in a time shared system

  • using very large time slices (quantas) degenerates into FirstCome First served (FCFS) algorithm.

  • using extremely small time slices improves performance

  • using very small time slices degenerates into Last-In First-Out (LIFO) algorithm.

  • using medium sized times slices leads to shortest Request time First (SRTF) algorithm

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Question 2

Which of the following need not necessarily be saved on a context switch between processes?

  • General purpose registers

  • Translation look-aside buffer

  • Program counter

  • All of the above

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Question 3

What is the name of the operating system that reads and reacts in terms of operating system?

  • Batch system

  • Quick response time

  • real time system

  • Time sharing system

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Question 4

Which of the following need not necessarily be saved on a Context Switch between processes?

  • General purpose registers

  • Translation look-aside buffer

  • Program counter

  • Stack pointer

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Question 5

The performance of Round Robin algorithm depends heavily on

  • size of the process

  • the I/O bursts of the process

  • the CPU bursts of the process

  • the size of the time quantum

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Question 6

Fork is

  • the creation of a new job

  • the dispatching of a task

  • increasing the priority of a task

  • the creation of a new process

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Question 7

Four jobs to be executed on a single processor system arrive at time 0 in the order A, B, C, D . Their burst CPU time requirements are 4, 1, 8, 1 time units respectively. The completion time of A under round robin scheduling with time slice of one time unit is

  • 10

  • 4

  • 8

  • 9

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Question 8

Which of the following transmission media is not readily suitable to CSMA operation?

  • Radio

  • Optical fibers

  • Coaxial cable

  • Twisted pair

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Question 9

In Ethernet, the source address field in the MAC frame is the _______ address.

  • original sender's physical

  • previous station's physical

  • next destination's physical

  • original sender's service port

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Question 10

Which Project 802 standard provides for a collision-free protocol?

  • 802.2

  • 802.3

  • 802.5

  • 802.6

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