Operating System (OS)
A spooler is a

Program that coordinates the print job that are waiting to process
Queue of print job that are waiting to print
Location in memory that maintains the contents of documents until it prints
Message sent from the printer to the operating system when a print job is completed

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Operating System (OS)
Addressing modes

are variations in the use of fundamental addressing structures, or some associated actions which are related to addressing.
performs indicated operations on two fast registers of the machine and leave the result in one of the registers.
All of these
None of these
defines the fundamental method of determining effective operand addresses

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Operating System (OS)
What is dispatch latency ?

The whole time taken by all processor
The time taken by the dispatcher to stop one process and start another
None of the listed here
The time taken by the processor to write a file into disk

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