In Unix, which system call creates the new process?

The correct answer is Fork. because the fork() system call is the explicit command utilized in Unix and Unix-like operating systems to create a brand-new child process.

• Step 1 (Process Duplication): When a running program triggers the fork() system call, the operating system creates an exact duplicate clone of the existing process.
• Step 2 (Parent and Child): The original process becomes the parent, and the freshly created clone becomes the child process, with both executing concurrently from the exact point of split.
• Incorrect Options:
  • Exec is incorrect because the exec() system call replaces the current process memory image with an entirely new program binary, rather than creating a new process.
  • Wait is incorrect because wait() instructs a parent process to pause its execution until its child processes have finished running.
  • Kill is incorrect because the kill() command sends a system termination signal to abort or stop an actively running process.