Bit:
. Abbreviated as 'b'.
. Circuits in computer have two states ON/OFF.
. Circuits in computer have two states ON/OFF.
. ON is represented by number 1.
. OFF is represented by number 0.
. Computer stores information in its memory only with 0's and 1's.
. Each 0 and 1 is called a 'bit'.
. It is smallest unit of information.
Byte:
. Abbreviated as 'B'.
. 8 bits are grouped together to form 1 Byte.
. Combination of 4 bits is called 1 nibble.
. 8 bits are grouped together to form 1 Byte.
. Combination of 4 bits is called 1 nibble.
. Each byte can store 1 character eg 'A', '1', '!' etc.
Why 8 Bits?
. ASCII defined 7-bit character set.
. One more extra bit is for all sort of things like parity.
How it works?
. Anything we type from keyboard, it converts into ASCII value.
. From this value, it is taken as bit representation and stores into the memory.
Bit rate:
. Number of bits that are transmitted per second is called bit rate.
. Measured as Kbps, Mbps etc.
. For example we have 1 Mbps speed of internet connection, and file size is 1 MB, it is downloaded in 8 seconds.