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

ANSWER DOWNLOAD EXAMIANS APP

Operating System (OS)
Which of the following statement is true.

None of these
The LRU algorithm pages out pages that have been used recently
Thrashing is a natural consequence of virtual memory systems.
Seek analysis is used for analysing control-unit busy problems.
All of these

ANSWER DOWNLOAD EXAMIANS APP

Operating System (OS)
The disadvantages of "Compile and Go" loading scheme is (are):

None of these
it is necessary to retranslate the user's program deck every time it is run.
it is very difficult to handle multiple segments, especially if the source programs are in different languages, and to produce orderly modular programs.
a portion of memory is wasted because the core occupied by the assembler is unavailable to the object program.
All of these

ANSWER DOWNLOAD EXAMIANS APP
MORE MCQ ON Operating System (OS)