Exercise: Operating Systems Concepts

Questions for: Operating Systems Concepts

Block or buffer caches are used
A:
to improve disk performance
B:
to handle interrupts
C:
to increase the capacity of main memory
D:
to speed up main memory read operation
Answer: A
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The most common security failure is
A:
carelessness by users
B:
depending on passwords
C:
too much emphasis on preventing physical access
D:
insufficient technology used to prevent breaches
Answer: A
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What is the name of the operating system which was originally designed by scientists and engineers for use by scientists and engineers?
A:
XENIX
B:
UNIX
C:
OS/2
D:
MS DOS
Answer: B
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A relationship between processes such that each has some part (critical section) which must not be executed while the critical section of another is being executed, is known as
A:
semaphore
B:
mutual exclusion
C:
multiprogramming
D:
multitasking
Answer: B
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File record length
A:
should always be fixed
B:
Should always be variable
C:
depends upon the size of the file
D:
should be chosen to match the data characteristics
Answer: D
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