Digital Info Review

Which number system is used to store information digitally in a computer?

• Decimal (base 10)

• Binary (base 2)

• Octal (base 8)

• Hexadecimal (base 16)

How many different digits are used in the Hexadecimal number system?

• 2

• 10

• 8

• 16

What is the decimal value of 1101₂?

• 13

• 12

• 1.101

• 1101

Suppose the ESPN website uses 8-bit unsigned integers to store how many points a team has scored in an NBA game. For example: 0000 0010 represents 2 points 0000 1000 represents 8 points

What is the highest possible score the ESPN website could display?

• 256

• 255

• 11111111

• 128

The RGB encoding scheme encodes a color using 24 bit sequences. The first 8 bits encode the amount of red in the color, the next 8 bits encode the amount of green in the color, and the last 8 bits encode the amount of blue in the color.

Which of the following is a true statement about the color encoded by this binary sequence:

1110 1001 0111 1100 0000 1111

• This color is mostly red.

• This color is mostly green.

• This color is mostly blue.

• This color has no blue in it.

Consider the following numbers:

The decimal value 10₁₀

The binary value 1001₂

Hexadecimal value C₁₆

Which of the following lists the numbers in order from least to greatest?

• 1001, 10, C

• 10, 1001, C

• 10, C, 1001

• C, 1001, 10

If black is 0 and white is 1, which of the following binary codes creates the smiley face pixel image below?

• 00100100 00000000 01000010 00111100 00000000

• 11011011 11111111 10111101 11000011 11111111

• 00110000 01010000 00111000 11111111 00000000

• 01010101 10101010 01010101 10101010 01010101