Operating System (OS)
Data encryption

is not necessary, since data cannot be intercepted
is mostly used by financial networks
is mostly used by public networks
None of these
cannot be used by private installations

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Operating System (OS)
Semaphores

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

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Operating System (OS)
Which of the following statements is not true about the FORTRAN language?

All of these
None of these
A FORTRAN program, written for the IBM-PC, is totally different from a FORTRAN program written for execution on the SUN machine
FORTRAN is extensively used to write programs for performing scientific computations
FORTRAN is a high level language

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