Section 4 memory and storage

Question 1

Main Memory

Answer 1

(RAM AND ROM) is directly accessible by the CPU, it is also know as the primary storage

Question 2

RAM: random access memory

Answer 2

required to temporarily store programs, instructions and data the computer needs whilst it is in operation.
These are copied from hard disk into main memory when they are required because it would be too slow to access everything directly from hard disk.
For even faster access, the most frequently used program instructions and data are held in cache

RAM is computers temporary working memory. Volatile.

Question 3

ROM: read only memory

Answer 3

stores instructions and data that never need to be changed, such as the computer’s start-up
instructions so that it knows what to do when you push the ‘on’ button. ROM is non-volatile as it is read only you cannot overwrit it contents once it has been set by the manufacturer

Question 4

RAM ADV OR DISADV

Answer 4

-Volatile all data is lost when the power is turned off
-Used as the computer’s working memory for instructions, programs and data
-can be written to, and read from

Question 5

ROM ADV DISADV

Answer 5

-Non-volatile data is permanently retained without power
-Used for the computer’s start-up instructions and in embedded systems
-Read-only so cannot be written too