How many byte in a block?

The answer is - Each block is 32 bytes (8 words), so we need 5 offset bits to determine which byte in each block - Direct-mapped => number of sets = number of blocks = 4096 => we need 12 index bits to determine which set For fully associative, the number of set is 1 => no index bit => tag bit = 32 - 0 - 5 = 27

What is a block in computing?

In computing (specifically data transmission and data storage ), a block, sometimes called a physical record, is a sequence of bytes or bits, usually containing some whole number of records, having a maximum length; a block size. Data thus structured are said to be blocked.

How many 512-byte blocks are allocated for a file in OS X?

So because the file contains 2 bytes OS X allocates 4096 bytes for that file, which is 512*8 and therefore there are 8 512-byte blocks allocated for that file? see what is the reason behind, why we use 512 bytes; let us say a file of size 513 bytes,than what happens is in order to store this file we need 2 blocks of size 512 bytes on the hard disk.

What is a nibble byte?

For extra credit, a "nibble" is a common term for half a byte. It arose during the early microcomputer CPU era (e.g., the Intel 8080), and was always understood to be 4 bits, because by then the byte had settled down to 8 bits. Today a 8-bit byte is a standard; see IEC 80000-13:2008.