Operating System (OS)
Semaphores

are used to do I/O
are used for memory management
synchronize critical resources to prevent contention
None of these
synchronize critical resources to prevent deadlock

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

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

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