Operating System (OS)
The total time to prepare a disk drive mechanism for a block of data to be read from it is

latency plus seek time plus transmission time
latency plus transmission time
latency plus seek time
latency
None of these

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Operating System (OS)
All of the following are task performed by the operating system except

Provides an interface for user to interact with computer
Performing housekeeping task like file compression and disk defragmentation
Managing hardware on the computer
Controlling the access that application program has to the CPU

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Operating System (OS)
Operating system

All of these
provides a layered, user-friendly interface
None of these
enables the programmer to draw a flowchart
links a program with the subroutines it references

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