Operating System (OS)
The memory allocation scheme subject to "external" fragmentation is

swapping
multiple contiguous fixed partitions
segmentation
None of these
pure demand paging

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Operating System (OS)
A public key encryption system

does not encode the data before transmitting it
allows only the correct sender to decode the data
allows anyone to decode the transmission
allows only the correct receiver to decode the data
None of these

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Operating System (OS)
Indicate which, of the following, in not true about an interpreter

None of these
Interpreter is a kind of translator
All of these
Interpreter generates an object program from the source program
Interpreter analyses each source statement every time it is to be executed

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