What is the name for an instruction that interrupts a program being executed and requests a service from the operating system?
A)system call
B)unit call
C)hardware instruction
D)system exception

Question

Quizplus · Accepted Answer

A system call is an instruction that interrupts a program being executed and requests a service from the operating system. Examples of services requested through system calls include input/output operations, process management, memory allocation, and file handling. Therefore, option A is the correct answer. The other options - unit call, hardware instruction, and system exception - are not relevant to the definition of a system call.

What Is the Name for an Instruction That Interrupts a Program