Memory And Storage Part One

Question 1

CPU

Answer 1

Central processing unit

To fetch and execute instructions

Arithmetic logic unit perform calculations and logic
ControlUnit decodes instructions and send signals to control how data is around CPU

Cache fast access memory to for frequently use instructions and data

Registers small fast memory used to help search and execute instructions

Question 2

Virtual memory

Answer 2

Virtual memory is using part of the hard disk as if it is memory

Nigel memory is needed because the amount of physical I may not be large enough to hold all open programs and data in use

Question 3

Need for secondary storage

Answer 3

Rom Can’t be used to save files it is read only

RAM can’t be used to save files because it is volatile

Therefore secondary storage is needed because it is read write and non-volatile. Can be used for long-term storage or changeable data