Operating System (OS)
Which, of the following, is true for testing and debugging?

Testing detects the syntax errors in the program while debugging corrects those errors in the program
Testing checks for logical errors in the programs, while debugging is a process of correcting those errors in the program
None of these
All of these
Testing and debugging indicate the same thing

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Operating System (OS)
Under virtual storage,

two or more programs are stored concurrently in primary storage
interprogram interference may occur
None of these
a single program is processed by two or more CPUs
only the active pages of a program are stored in primary storage

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Operating System (OS)
Thrashing

is a natural consequence of virtual memory systems
always occurs on large computers
can always be avoided by swapping
None of these
can be caused by poor paging algorithms

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Operating System (OS)
Most of the microcomputer's operating systems like Apple DOS, MS DOS and PC DOS etc. are called disk operating systems because

None of these
they are memory resident
they are partly in primary memory and partly on disk
they are initially stored on disk
they are available on magnetic tapes

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