Operating System Questions
A system call is a mechanism provided by the operating system that allows user programs to request services from the kernel. It acts as an interface between the user program and the operating system, enabling the program to access resources and perform privileged operations that are not directly accessible to the user. System calls are used by applications to perform tasks such as file operations, process management, network communication, and device control. When a program needs to perform a system call, it makes a request to the operating system through a specific function call, which triggers the kernel to execute the requested operation on behalf of the program.