Question

write a short note on memory unit

Answer 1

A modern computer has the following hardware components: input/output devices, processing unit, memory unit and secondary storage. The memory unit is the principal storage of the computer. All the data and instructions that the computer needs at a moment are stored here.The earliest types of memory were electromechanical relays, mercury-filled tubes and transistors. Now the memory is in the form of a semiconductor or silicon chip.A computer memory unit is the storage where data and instructions go when entered into the computer.Memory units nowadays are measured in megabytes; the usual computer may have 64 MB, 128 MB, 512 MB or more. Some have memories in gigabytes. The higher capacity, the better computer performance.

Answer 2

it is aninternal storage area in the computer system. The term memory is used for physical memory, which refers to the actual chips capable of holding data. there is also a virtual, memory, which exoands physical memory onto a hard disk. there are two types of memory use in computer primary and secondary.

primary memory:- every computer comes with a certain amount of physical memory, usually referred to as main memory or primary memory for example RAM or ROM

secondary memory :- these types of memories are internal or external inside or outside the computer. It store programs and data permanently. it is slower but cheaper. Floppy disjs, hard drives, CD, DVD, pen drive etc are secondary storage devices. The secondary storage can be divided into megnetic device, optical device and flash memory.