Solution

The correct answer is A ‐ IV, B ‐ III, C ‐ I, D ‐ II.

Key Points

• fork(): The fork() is responsible for generating a new process or a child process in the system. Whatever program counter and registers are used by the parent process, the same program counter and registers are used by the child process.
• exec(): The exec() is mainly used for replacing the running process and loading the memory with the new process.
• kill(): The kill() system call is used for sending a signal from one process to another process.
• exit(): The exit() system call is used for terminating the current process.

Thus the correct answer is A ‐ IV, B ‐ III, C ‐ I, D ‐ II​.

Additional Information

• To interact with the operating system, the system call programmes are used. The system calls are used for providing services of operating systems such as creating process and managing it, managing the main memory. It is also used for accessing and managing files.
• There are five different kinds of system calls. These are process control, file management, device management, controlling information and building communication.