A single unit which is composed of small group of bits is known as-

Explanation

Explanation: The memory unit is the amount of data that can be stored in the storage unit. This storage capacity is expressed in terms of Bytes . Bit (Binary Digit) : A binary digit is logical 0 and 1 representing a passive or an active state of a component in an electric circuit. Nibble : A group of 4 bits is called a nibble. Byte : A group of 8 bits is called byte. A byte is the smallest unit, which can represent a data item or a character. Word: A computer word, like a byte, is a group of a fixed number of bits processed as a unit, which varies from computer to computer but is fixed for each computer. Memory units with no. of Bytes: Memory units Bytes Kilobyte(KB) 1024Bytes Megabyte(MB) 1024KB Gigabyte(GB) 1024MB Terabyte(TB) 1024GB