Operating System Concepts Quiz Part1

In a timesharing operating system, when the time slot assigned to a process is completed, the process switches from the current state to?

• Suspended state

• Terminated state

• Ready state

• Blocked state

What is a short-term scheduler?

• It selects which process has to be brought into the ready queue

• It selects which process has to be executed next and allocates CPU

• It selects which process to remove from memory by swapping

• None of the mentioned

If a process fails, most operating system write the error information to a ______ .

• new file

• another running process

• log file

• none of the mentioned

If a process is executing in its critical section, then no other processes can be executing in their critical section. What is this condition called?

• mutual exclusion

• critical exclusion

• synchronous exclusion

• asynchronous exclusion

When are the register context and stack of thread deallocated?

• when the thread terminates

• when the thread blocks

• when the thread unblocks

• when the thread spawns

For which of the following purposes, Banker's algorithm is used?

• Preventing deadlock

• Solving deadlock

• Recover from deadlock

• None

Identify the system calls that on termination does not return control to the calling point.

• exec

• fork

• longjmp

• ioctl

What is a long-term scheduler?

• It selects processes which have to be brought into the ready queue

• It selects processes which have to be executed next and allocates CPU

• It selects processes which heave to remove from memory by swapping

• None of the mentioned

A systematic procedure for moving the CPU to new process is known as-

• Synchronization

• Deadlock

• Starvation

• Context Switching

Consider three CPU-intensive processes, which require 10, 20 and 30 time units and arrive at times 0, 2 and 6 respectively. How many context switches are needed if the operating system implements a shortest remaining time first scheduling algorithm? Do not count the context switches at time zero and at the end.

• 1

• 2

• 3

• 4