AQA GCSE Computer Science 3.4 Computer systems overview quiz quiz

The central processing unit

The flat-screen monitor

The operating system

The mechanical keyboard

When at least one input is 1

Only when both inputs are 0

When the inputs are different

Only when both inputs are 1

Outputs the opposite of its single input

Outputs a 1 only when both of its inputs are 1

Adds two separate inputs together to give a sum

Outputs a 1 whenever its two inputs are different

Execute, decode, fetch

Fetch, decode, execute

Decode, fetch, execute

Fetch, execute, decode

The control unit that directs operations

The registers

The arithmetic logic unit

The cache memory store

A larger hard disk

More secondary storage

A larger monitor

A higher clock speed

It is volatile and loses data when the power is off

It is non-volatile and keeps all of its data without any power

It stores the boot program permanently

It is read-only and cannot be changed

Extra high-speed cache memory built inside the CPU itself

Part of secondary storage used as if it were extra RAM

A type of read-only memory chip

Memory that never loses its data

Magnetic disk

Optical

Solid state

Cache

Writing a document for the user to print and read

Browsing the web and loading pages

Editing a photo

Memory management, allocating RAM to programs

Defragmenting a disk to speed up file access

Playing a three-dimensional action game online

Sending an email to a friend

Running a spreadsheet

Because RAM is far too fast for the processor to keep up with

Because RAM is volatile and loses data when the power is off

Because the CPU is unable to read anything from the RAM

Because ROM is too large