Bit:

Single binary value either 0 or 1.

What is Nibble?

Half of a byte.

What is Octet?

Used to store eight bits.

Why Byte has eight bits?

In previously the size of Byte is hardware dependent and no standards existed to the size.

Eight bits is a convenient power of 2 permitting through 0 to 255 for one byte.

How to convert Bits and Bytes?

 8 bits         =           1 byte.

1024 bytes =           1 kilo byte.

1024 KB    =           1 giga byte.

1024 GB    =           1 Tera byte.

Who invented Bit?

 John W. Tukey.

What does 0 and 1 represent?

0 represents False.

1 represents True.

How bits are represented in Byte?

  

How to get Total value?

High nibble * 16 + Low nibble.

Low nibble:
Contains less significant value.

High nibble:
Contains most significant value.

Difference between Bit and Byte?