CSI3131 Midterm S2019

To access the services of operating system, the interface is provided by:

• System calls

• API

• Library

• Assembly instructions

• None of the above

In operating system, each process has its own:

• address space and global variables

• open files

• pending alarms, signals and signal handlers

• all of the above

• none of the above

Which system call returns the process identifier of a terminated child?

• wait

• exit

• fork

• get

• exec

The number of processes completed per unit time is known as

• Response Time

• Throughput

• Efficiency

• Turnaround Time

• None of the above

The Process Control Block (PCB) is:

• A data structure

• A secondary storage section

• A Block in memory

• All of the above

• None of the above

The degree of multi-programming is:

• the number of processes executed per unit time

• the number of processes in the ready queue

• the number of processes in the I/O queue

• the number of processes in memory

• none of the above

The parent process completes execution, but the child keeps executing, then the

child process is known as:

• Orphan

• Zombie

• Body

• Dead

• None of the above

What is a medium-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 to it

• It selects which process to remove from memory by swapping

• All of the above

• None of the above

In Round-Robin scheduling, when the time quantum given to a process expires,

the process goes from the ____ state to the ____ state:

• Running, Blocked

• Ready, Running

• Ready, Suspended

• Running, Ready

• Blocked, Ready

The interval from the time of submission of a process to the time of completion

of a processing burst is termed as:

• waiting time

• turnaround time

• response time

• real time

• time quantum