Question

Question 26 1 pts Information can be retrieved fastest from: USB flash drive. magnetic tape. optical disk. hard disk. Question 27 7 pts Suppose we have a byte-addressable computer with a cache that holds 8 blocks of 4 bytes each. Assuming that each memory address has 8 bits, to which cache block would the hexadecimal address Ox 17 map if the computer uses direct mapping?

both ques pls

Answer 1

(26)

Answer: Hard disk

Explanation:

Hard disk supports speedy retrieval of data compared to optical disk, magnetic disk and USB flash drive.

(27)

Given,

Memory address has 8 bits.

Number of cache blocks = 8.

Therefore, number of bits required in the block filed = log₂ n = log₂ 8 = 3.

Block size = 4 Bytes.

Therefore, number of bits required in the block offset required = log₂ n = log₂ 4 = 2.

Tag field requires = 8 - 3 - 2 = 3.

Therefore,

Tag: 3 bits

Block: 3 bits

Offset: 2 bits

Given Address is : 0x1F = 0001 1111

Tag (3 bits)	Block (3 bits)	Offset (2 bits)
000	111	111

Given memory address map to cache block 111₂ = 7₁₀ = 0x07₁₆

Therefore, given memory address maps to cache block 7.