Explain how the operating system does memory management.
Answer:
-The operating system allocates memory to the user programs and itself.
-It ensures that each program has enough memory to execute its processes.
-It ensures that one process does not use the memory allocated to another process.
-It release the memory allocated to a job once the job is completed or the program is closed
-It ensures that each program has enough memory to execute its processes.
-It ensures that one process does not use the memory allocated to another process.
-It release the memory allocated to a job once the job is completed or the program is closed
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Define the word operating system. 
