Discussion
Memory management is
Answer: D
Memory management is critical for even the simplest operating systems.
Every operating system must keep track of which parts of memory are in use, allocate memory to programs and reclaim it, and protect the operating system from user programs. Even a simple single-user system needs this.
Memory management is used in all modern and multiprogramming systems, and virtual memory is a form of memory management, not a replacement for it.
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