Ch.1 - data representation

what is the difference between denary and binary?

• Denary uses 0 and 1 while binary uses 0-9
• Denary is base 2 and binary is base 10
• Denary is used for computers and binary is used for human calculations
• Denary is base 10 and binary is base 2

what is a hexadecimal of 4556

• 1234
• ABCD
• 9999
• 11CC

calculate this binary manipulation :
1 0 0 1 1 1 - 0 0 1 0 1 0

• 100011
• 001010
• 111000
• 011101

convert denary 35 into negative 2 complement

• 111111
• 101010
• 11011101

• 110001

using ASCII table, try to decode this message

01100011 01101111 01101101 01110000 01110101 01110100 01100101 01110010 00100000 01110011 01100011 01101001 01100101 01101110 01100011 01100101

• mathematics
• biology
• chemistry
• computer science

what is a pixel?

• A pixel is a type of fruit
• A pixel is a unit of measurement for weight
• A pixel is a type of bird
• A pixel is the smallest controllable element of a picture represented on a screen.

metadata is

• A type of computer virus
• A type of programming language
• A type of hardware component
• a lot of Information about the data

how many color is 32 bit color depth

• 256
• 1,000,000
• 64
• 16,777,216

which one is bigger, pebibyte or exibyte?

• Megabyte
• Exibyte
• Terabyte
• Pebibyte

explain what is data compression?

• Data compression is the process of increasing the size of data for storage or transmission.
• Data compression is the process of encrypting data for storage or transmission.
• Data compression is the process of organizing data into categories for storage or transmission.
• Data compression is the process of reducing the size of data for storage or transmission.