Computer Science

random access memory — temporary memory used to store data and instructions that the CPU needs while the computer is running

read-only memory — stores essential instructions needed for the computer to start up and operate

a small storage location for frequently used instructions

borrowed storage located in secondary storage, used when the RAM is full

Main memory

Software and embedded systems

Operating system

The processor

The fetch-execute (FE) cycle

Secondary storage

Computer specifications

Environmental impacts of computing devices

In this unit pupils will discover the difference between general purpose and embedded systems. They will examine computer architecture and the components that make up a processor. Pupils will recognise the need for storage and be able to select a suitable storage device for a given purpose.

Computer Systems

Which memory stores data and instructions currently in use?

What term describes memory that loses its contents when the power is switched off?

Which of these is an example of non-volatile memory?

stores instructions needed to start the computer

What is the function of ROM in a computer?

small, fast storage for frequent instructions

Match each term to its correct description:

Place these types of memory in order from fastest to slowest:

decodes instructions and directs operations

What is the main function of the control unit in the CPU?

Which CPU register temporarily stores the results produced during processing?

Put the following in order of data movement within a computer:

What type of program imitates real-world processes?

It is the language computers use to process data.

Why is binary representation important in computers?

What does a bus do if the CPU wants to send data to memory?

Main memory

Lesson outcome