Operating System (OS)
Backups should be done

as several image copies, followed by an incremental
daily for most installations
None of these
as several incrementals, followed by an image copy
weekly for most installations

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Operating System (OS)
The advantage(s) inherent to using high level languages is (are)

Fewer people, less management and shorter transition in learning time
All of these
Improved debugging capability, and superior documentation
None of these
A greater degree of machine independence

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Operating System (OS)
File record length

should always be fixed
should be chosen to match the data characteristics
depends upon the size of the file
None of these
Should always be variable

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Operating System (OS)
The Memory Buffer Register (MBR)

contains a copy of the designated memory location specified by the MAR after a "read" or the new contents of the memory prior to a "write".
is a hardware memory device which denotes the location of the current instruction being executed.
None of these
is a group of electrical circuits (hardware), that performs the intent of instructions fetched from memory.
contains the address of the memory location that is to be read from or stored into.

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