Operating System (OS)
Which of the following is not true about documentation?

Documentation, of a system, should be as clear and direct as possible
Documentation gives better understanding of the problem
None of these
Documentation increases the maintenance time and cost
All of these

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Operating System (OS)
System maintenance:

always requires several programs
is necessary on all systems, regardless of how good
None of these
is not required if the system is well written
is usually not necessary

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