OS MCQ 1

What is an operating system?

• collection of programs that manage hardware resources

• 1. system service provider to the application programs

• link to interface the hardware and application programs

• 1. all of the mentioned

Which one of the following error will be handle by the operating system?

• power failure

• 1. lack of paper in printer

• connection failure in the network

• 1. all of the mentioned

The main function of the command interpreter is

• to get and execute the next user-specified command

• 1. to provide the interface between the API and application program

• 1. to handle the files in operating system

• 1. none of the mentioned

An un-interruptible unit is known as

• single

• atomic

• static

• None of these

When any OS is booted, the very first program that is executed is

• init

• system call

• monitor call

• interrupt program

What is the objective of multiprogramming operating systems?

• Maximize CPU utilization

• Switch the CPU among processes

• Achieve multitasking

• None of the mentioned

Which of the following features will characterize an OS as a multi-programmed OS?

1. More than one program may be loaded into the main memory at the same time.

2. If a program waits for a certain event, another program is immediately scheduled.

3. If the execution of a program terminates, another program is immediately scheduled.

• Only (1)

• (1) and (2) only

• (1) and (3) only

• (1), (2) and (3) only

Which program controls the execution of programs to prevent errors and improper use of computer?

• Resource allocator

• Control Program

• Hardware

• None of the mentioned

In which type of operating system users do not interact directly with the computer system?

• Multiprogramming operating systems

• Multiprocessing operating systems

• Batch operating systems

• Distributed operating systems

The operating system switches from user mode to kernel mode so the mode bit will change from?

• 0 to 1

• 1 to 0

• Remain constant

• None of the mentioned