Data representation- Text and numbers

Why do computers work with binary data?

• Electronics with only 2 states are less error prone
• Computers can only count to 2
• Because binary is what machine code is written in
• Because buses are the connections between components

Convert 11111111 to decimal

• 255
• 245
• 235
• 225

Convert 11001100 to decimal

• 224
• 134
• 104
• 204

Convert 128 to binary

• 10000000
• 01111110
• 10000001
• 11001100

Convert 65 to binary

• 01100001
• 00100001
• 01000001
• 00100101

what is 290 in binary?

•  0000 0001 0010 0010
• 0000 0101 0010 0010
•  0000 0001 0110 0010
•  0000 1001 0010 0010

What is 48091 in binary?

• 1011 1011 1101 0011
• 1111 1011 1101 1011
• 1011 1011 1111 1011
• 1011 1011 1101 1011

What is the range of number that can be represented by 3 bit?

• -8 to 7
• -8 to 8
• -3 to 3
• -3 to 2

What is the range of numbers that can be represented by 16 bit?

• -65536 to 65536
• -65536 to 65535
• -16 to 15
• -16 to 16

Find the 2s complement of -97

• 10100011
• 10010111
• 10011110
• 10011111