Provide 5 system calls for Unix/Linux and Windows.
3. Provide 5 system calls for Unix/Linux and Windows.
1) System calls are the interface between an application and the operating system. They are specific functions or methods provided by the operating system that allow programs to request services from the underlying kernel.
2) These services can include operations like file and input/output operations, process control, memory allocation, and network communication.
3) When a program wants to perform a task that requires privileged access or interaction with hardware, it makes a system call. The program switches from user mode (where it executes normal instructions) to kernel mode (privileged mode) to allow the operating system to perform the requested task on its behalf.
4) They are a crucial mechanism for applications to interact with the underlying hardware and services provided by the operating system. They form a bridge between user-level applications and the privileged kernel, allowing programs to perform tasks that require special privileges or hardware access.
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