What is the name of 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

An instruction that interrupts a program being executed and requests a service from the operating system is called a system call. It allows a user level program to request a service from the kernel, such as reading or writing to files, allocating memory, or creating new processes. The system call transfers control from user mode to kernel mode, where the requested service can be performed by the operating system.

What Is the Name of an Instruction That Interrupts a Program