Differences Between Fork and Exec

Cited from Differences between exec and fork

"A process is an execution environment that consists of instruction, user-data, and system-data segments, as well as lots of other resources acquired at runtime, whereas a program is a file containing instructions and data that are used to initialize the instruction and user-data segments of a process."

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• fork() creates a duplicate of the current process
• exec() replaces the program in the current process with another program

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