What is compaction?
Answer: C
Correct answer: a technique for overcoming external fragmentation
Compaction shuffles the allocated blocks together so that the scattered free holes merge into one. It does nothing about internal fragmentation, which is waste inside an allocation.
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When the entries in the segment tables of two different processes point to the same physical location :
Answer: C
Correct answer: segments are shared
If two processes' segment table entries give the same base and limit, both are using the same physical memory, which is how code is shared between processes. Segmentation makes this natural because a segment is a logical unit such as a library.
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Memory management technique in which system stores and retrieves data from secondary storage for use in main memory is called:
Answer: B
Correct answer: paging
Paging moves fixed-size pages between disk and main memory as they are needed, so a process may run with only part of itself resident.
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What is the use of video conferencing?
Answer: B
Correct answer: It is used for live conferencing
Video conferencing carries live picture and sound between two or more places at once, so a meeting can be held without the participants travelling. Ordinary communication and talking are what it is a particular form of, not what distinguishes it.
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In contiguous memory allocation :
Answer: A
Correct answer: each process is contained in a single contiguous section of memory
Contiguous allocation means each process occupies one unbroken run of addresses. That is what makes it simple - a base and a limit describe the whole process - and also what causes external fragmentation.
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Comments used to make program easier are also called as
Answer: A
Correct answer: narrative
Comments included to explain a program are its narrative - text the translator ignores and the reader does not.
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The first fit, best fit and worst fit are strategies to select a ______
Answer: C
Correct answer: free hole from a set of available holes
First fit, best fit and worst fit are placement strategies: given a request and a list of free holes, each chooses a different hole. First fit takes the first large enough, best fit the smallest large enough, worst fit the largest.
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If and email is received by an unknown person then
Answer: C
Correct answer: It should be deleted without opening it
An unexpected message from an unknown sender may carry malware in its attachment or a link to a fraudulent site, and replying at all confirms that the address is live. Deleting it unopened is the only response that gives the sender nothing.
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Which one of the following is the address generated by CPU?
Answer: C
Correct answer: logical address
Every address a program generates is a logical, or virtual, address; the memory management unit translates it into the physical address that reaches the memory chips.
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Which one of the following is the most important or powerful computer in a network?
Answer: C
Correct answer: Network Server
The server stores the shared data and runs the shared services, so it is both the most capable machine and the one everything else depends on.
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