Bits of storage

A light bulb can be set to three positions.

• True

• False

The CPU contains many tiny switches. Each switch can be on or off.

• True

• False

Computers use a special number system to tell us whether their switches are on or off.

• True

• False

Zero represents the state when the device is on.

• True

• False

The binary number system is used by computers to represent data.

• True

• False

Data can include text, image, audio, video and games.

• True

• False

Every character on a keyboard is represented by the same pattern of ones and zeros.

• True

• False

If you are typing an​ ​ (a)   to a friend, when the uppercase letter ‘Z’ on the ​ (b)   is pressed, it sends an​ (c)   signal to the ​ (d)   , which is converted to the​ (e)   code ‘0101 1010’.

• email
• keyboard
• electrical
• computer
• binary

Binary number system

•  consists of two digits: 1 and 0.

  It is used to represent all data stored in a computer.

• 1 represents the state when the device is on

• 0 represents the state when the device is off.

• contains many tiny switches. Each switch can be on or off.

Why is the binary number system used to represent data in a computer?

• because binary code

  was the Z3 invented by Konrad Zuse in 1941.

• because computers use the binary system because they operate with electronic switches that can be either ON (1) or OFF(0)

• because component that

  controls what a computer

  does

• because a computer is made up of many devices