COA_Ch06_InClass-2

“Locality of reference” refers to:

• data always being in cache
• programs always referencing data in RAM
• clustering of memory references
• the requirement that forces us to use a large amount of expensive memory

Cache memory is typically positioned between:

• the CPU and RAM
• the CPU and the hard drive
• ROM and RAM
• none of the above

All cache mapping schemes require a main memory address to have an offset field.

• True
• False

The tag field of a main memory address is used to determine:

• if the cache entry is valid
• if the cache entry is the desired block
• if the memory address is valid
• none of the above

Cache replacement policies are necessary:

• to determine which cache mapping policy to use
• to determine which block in cache should be the victim block
• to decide where to put blocks when cache is empty
• all of the above

Caching breaks down when programs exhibit good locality.

• True

• False

The average time required to reach a memory storage location and retrieve its contents is called:

• latency

• response time

• hit time

• effective access time