OPERATING SYSTEM-Processes and Process Control Block

What is an operating system?

• a) collection of programs that manages hardware resources

• b) system service provider to the application programs

• c) interface between the hardware and application programs

• ALL OF a,b and c

• only c

In operating system, each process has its own __________

• a) address space and global variables

• b) open files

• c) pending alarms, signals and signal handlers

• all of the mentioned

What is the ready state of a process?

• a) when the process is scheduled to run after some execution

• b) when the process is unable to run until some task has been completed

• c) when process is using the CPU

• none of the mentioned

The address of the next instruction to be executed by the current process is provided by the __________

• CPU registers

• Program counter

• Process stack

• Pipe

A Process Control Block(PCB) does not contain which of the following?

• Code

• Stack

• Bootstrap program

• Data

Which of the following is not the state of a process?

• New

• Old

• Waiting

• Running

What is a Process Control Block?

• Process type variable

• Data Structure

• A secondary storage section

• A Block in memory

The entry of all the PCBs of the current processes is in __________

• Process Register

• Program Counter

• Process Table

• Process Unit

What is the degree of multiprogramming?

• the number of processes executed per unit time

• the number of processes in the main memory at any point

• the number of processes in the I/O queue

Suppose that a process is in “Blocked” state waiting for some I/O service. When the service is completed, it goes to the :

• Running state

• Ready state

• Suspended state

• Terminated state