7. Information can be retrieved fastest from: A) hard disk. B) magnetic tape. C) optical disk. D) USB flash drive. 8. Cache mapping is necessary because: A) the address generated by the CPU must be converted to a cache location. B) cache is so small that its use requires a map. C) cache is larger than main memory and mapping allows us to store multiple copies of each piece of data from main memory. D) None of these is correct. 9. The offset field of a main memory address is used to determine: A) if the cache entry is valid. B) if the cache entry is the desired block. C) the location of the desired data in the cache block. D) None of these is correct.
7. Information can be retrieved fastest from:
A) hard disk.
B) magnetic tape.
C) optical disk.
D) USB flash drive.
8. Cache mapping is necessary because:
A) the address generated by the CPU must be converted to a cache location.
B) cache is so small that its use requires a map.
C) cache is larger than main memory and mapping allows us to store multiple copies of each piece
of data from main memory.
D) None of these is correct.
9. The offset field of a main memory address is used to determine:
A) if the cache entry is valid.
B) if the cache entry is the desired block.
C) the location of the desired data in the cache block.
D) None of these is correct.
10. Cache replacement policies are necessary:
A) to determine which cache mapping policy to use.
B) to determine which block in cache should be the victim block.
C) to decide where to put blocks when cache is empty.
D) All of these are correct.
11. Cache memory is effective because:
A) it is very inexpensive.
B) it is very large.
C) it is very small.
D) of the principle of locality.
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