Operating System (OS)
What are the two types of Semaphore?

Counting Semaphores and Binary Semaphores
Critical Semaphores and System Semaphores
Digital Semaphores and Binary Semaphores
Analog Semaphores and Octal Semaphores

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

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

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