Q7. What is the function of main memory? What are the measuring units of memory?
Ans. The memory of a computer is more like a predefined working place, where it temporarily keeps information and data to facilitate its performance. When the task is performed, it clears its memory and memory space is then available for the next task to be performed. When the power is switched off, everything stored in the memory gets erased and cannot be recalled.
The memory of a computer can be thought of as ‘cells’.
A memory cell may be defined as a device which can store a symbol selected from a set of symbols.
Each of these cells is further broken down into smaller parts known as bits. A bit means a binary digit that is, either 0 or 1.
A bit is an elementary unit of the memory.
A group of 8 bits is called a byte and a group of 4 bits is called a nibble.
One byte is the smallest unit which can represent a data item or a character. Other units of memory are KB, MB, GB, and TB.