Post test 21-22

Which one of the devices below is an input device?

• earbuds

• keyboard

• 3D printer

Which one of the devices below is an output device?

• phone touch screen

• mouse

• speakers

Humans use the decimal number system with numbers ranging from 0 to 9. Computers use the binary number system with only these two numbers:

• 0 and 1

• 3 and 4

• 8 and 9

Photos, videos, and graphics are all made up of tiny little dots called _____ , each with a color that can be represented by a specific number.

• pixels

• specks

• megabytes

To display (on a screen) each letter you type on a computer keyboard, the computer runs

• Thousands of instructions

• one or two instructions

Which one in the list below is an example of computer hardware?

• apps

• programs

• circuits

Which of the following is NOT software

• minecraft edu

• google docs

• chromebook

The master chip that controls all the other parts of the computer is called

• CPU (processor)

• microchip

• megachip

An action that causes something to happen

• loop

• bug

• event

• conditional

An error in a program that prevents the program from running as expected

• byte

• loop

• pixel

• bug