Operating System Viva

CPU scheduling is the basis of ___________

• multiprogramming operating systems
  

• larger memory sized systems

• multiprocessor systems

• none of the mentioned

What is the task of exec family?

• replaces the current process image with a new process image.

• to execute the process

• to create the process

• None of above

Which page replacement algorithm is efficient?

• Having more average waiting time

• Having more turn around time

• Having less turn around time

• Having less average waiting time

Inter process communication is achieved through

• Shared memory

• Pipe

• Buffer

• Shared memory and Pipe

when the page referenced by the CPU is not found in the main memory then it is called as:

• page hit

• page fault

• paging

• segmentation

The wait operation of the semaphore basically works on the basic _______ system call.

• stop()

• block()

• hold()

• wait()

A computer system has 6 tape drives, with ‘n’ processes competing for them. Each process may need 3 tape drives. The maximum value of ‘n’ for which the system is guaranteed to be deadlock free is?

• 2

• 3

• 4

• 1

If the size of logical address space is 2 to the power of m, and a page size is 2 to the power of n addressing units, then the high order _____ bits of a logical address designate the page number, and the ____ low order bits designate the page offset.

• m, n
  

• n, m

• m – n, m

• m – n, n

An increase in a computer’s RAM leads to a typical improvement in performance because:

• Virtual memory increases

• Fewer page faults occur

• Fewer segmentation faults occur

• A larger RAM is faster

In which of the following four necessary conditions for deadlock processes claim exclusive control of the resources they require?

• no preemption

• mutual exclusion

• circular wait

• hold and wait