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ISRO 2018: Operating System Booster Quiz- 1
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Question 1
Which of the following is not an optimization criterion in the design of a CPU scheduling Algorithms?
Question 2
Mutual exclusion problem occurs
Question 3
There are 200 tracks on a disk platter and the pending requests have come in the order - 36, 69, 167, 76, 42, 51, 126, 12, and 199. Assume the arm is located at the 100th track and moving towards track 200. If sequence of disc access is 126, 167, 199, 12, 36, 42, 51, 69, and 76 then which disc access scheduling policy is used?
Question 4
Given reference to the following pages by a program
0, 9, 0, 1, 8, 1, 8, 7, 8, 7, 1, 2, 8, 2, 7, 8, 2, 3, 8, 3
How many page faults will occur if the program has three page frames available to it and uses an optimal replacement?
0, 9, 0, 1, 8, 1, 8, 7, 8, 7, 1, 2, 8, 2, 7, 8, 2, 3, 8, 3
How many page faults will occur if the program has three page frames available to it and uses an optimal replacement?
Question 5
What is the output of the following program?
main()
{
int a = 10;
if ((fork () == 0))
a++;
printf(“%d\n”, a);
}
main()
{
int a = 10;
if ((fork () == 0))
a++;
printf(“%d\n”, a);
}
Question 6
Which of the following statement is true?
Question 7
At particular time, the value of a counting semaphore is 10, it will become 7 after
Question 8
A critical region
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Jun 25GATE & PSU CS
