Binary & ASCII

What is binary?

• A system using base-10

• A system using base-2

• A system using base-8

• A system using base-16

What is denary?

• A system using base-2

• A system using base-16

• A system using base-8

• A system using base-10

How does a computer communicate?

• By using sound waves

• By sending and receiving electrical signals (binary)

• By sending and receiving electrical signals (binary)

• By using magnetic signals

What does it mean when a computer is off?

• There is NO electrical current flowing (binary 0)

• The computer is asleep

• The computer is in hibernation mode

• It is powered on but inactive

What does it mean when a computer is on?

• The computer is running in low-power mode

• There is AN active electrical current (binary 1)

• The computer is receiving binary data but not processing it

• The screen is on

What is the binary number for the decimal number 10?

• 1000

• 1010

• 1100

• 1110

Convert the binary number 1011 into decimal.

• 9

• 10

• 11

• 12

How many bits are in a byte?

• 4

• 8

• 16

• 32

What is the binary representation of the decimal number 5?

• 101

• 110

• 111

• 100

Which of these binary numbers is equal to the decimal number 13?

• 1101

• 1110

• 1001

• 1011