Operating System (OS)
In which addressing mode the operand is given explicitly in the instruction?

index mode
immediate mode
None of these
indirect mode
absolute mode

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Operating System (OS)
Multiprogramming

consists of those addresses that may be generated by a processor during execution of a computation.
is a method of memory allocation by which the program is subdivided into equal portions, or pages and core is subdivided into equal portions or blocks.
None of these
allows multiple programs to reside in separate areas of core at the time.
is a method of allocating processor time.

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Operating System (OS)
System maintenance:

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

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