Computer Systems

Question 1

What is main memory?

Answer 1

Primary storage (also known as main memory) is the component of the computer that holds data, programs and instructions that are currently in use.

Question 2

What is secondary storage?

Answer 2

Secondary storage is non-volatile, long-term storage. It is used to keep programs and data indefinitely. Without secondary storage all programs and data would be lost the moment the computer is switched off.

Question 3

Main Memory (Primary storage) examples

Answer 3

There are four types of primary storage:

read only memory (ROM)
random access memory (RAM)
flash memory
cache memory

Question 4

Secondary Storage examples

Answer 4

Secondary storage devices are generally separated into three types:

• magnetic storage devices, such as hard disk drives
• optical storage devices, such as CD, DVD and Blu-ray discs
• solid state storage devices, such as solid state drives and USB memory sticks

Question 5

volatile meaning

Answer 5

Volatile memory loses its contents when power is lost.