What is an operating system?

• interface between the hardware and application programs`

• collection of programs that manages hardware resources

• system service provider to the application programs

• all of the mentioned

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

• Library

• System calls

• Assembly instructions

• API

Which one of the following is not true?

• kernel remains in the memory during the entire computer session.

• kernel is made of various modules which can not be loaded in running operating system

• kernel is the first part of the operating system to load into memory during booting

• kernel is the program that constitutes the central core of the operating system

The parent process completes execution, but the child keeps executing, then the child process is known as __________

• Orphan

• Zombie

• Body

• Dead

What is a zombie process in a computer system?

• A process that has terminated but its parent has not yet collected its exit status

• A process that has not yet started

• A process that is stuck in an infinite loop

• A process that is waiting for input/output operations to complete

How can a zombie process be identified?

• By checking the CPU usage

• By checking the process ID

• By checking the process state in the process table

• By checking the amount of memory used

In operating system, each process has its own __________

• open files

• pending alarms, signals, and signal handlers

• address space and global variables

• all of the mentioned

In a timeshare 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

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

• Terminated state

• Suspended state

• Running state

• Ready state

The operating system is responsible for?

• bad-block recovery

• booting from disk

• disk initialization

• all of the mentioned