2019 Review - I, IGCSE CS 0478 - dfm

What does ASCII stand for

• American Scheme for Colours In the Internet

• Any Set of Characters In the Internet

• All Set Characters In Information

• American Standard Code for Information Interchange

How many bits does ASCII use for 1 letter?

• 8

• 10

• 2

• 1

7 bit ASCII code can represent 128 characters

• True
• False

Convert the Hex number DA to binary.

• 11001010
• 11011011
• 11011010
• 11011110

Convert the Hex number B9 to binary.

• 10111001
• 10111000
• 10111101
• 10101001

Convert the Hex number 1F to binary.

• 00111111
• 00001111
• 00010111
• 00011111

Convert the binary number 10101010 to Hex

• AA
• BB
• CC
• DD

Convert the binary number 11000011 to Hex

• 11

• A2

• C3

• D4

Convert the binary number 11010110 to Hex

• A3
• B4
• C5
• D6

Which of these are binary digits?

• 0

• 1

• 2

• 3