
Digital Number Systems Quiz
Quiz
•
Computers
•
8th Grade
•
Practice Problem
•
Medium
Christina Sweek
Used 9+ times
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14 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which number system is used to store information digitally in a computer?
Decimal (base 10)
Binary (base 2)
Octal (base 8)
Hexadecimal (base 16)
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
How many different digits are used in the Hexadecimal number system?
2
10
8
16
Answer explanation
The Hexadecimal number system uses 16 digits (0 1 2 3 4 5 6 7 8 9 A B C D E F)
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
How many different values can be represented using 4 bits?
4 different values
8 different values
16 different values
32 different values
Answer explanation
4 bits can encode 2^4 = 16 different values
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which of the following pixels has a color value of #00ff00 (expressed in hexadecimal)?
White Pixel
Blue Pixel
Red Pixel
Green Pixel
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
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
00111000 01000000 00111000 11111111 00000000
01010101 10101010 01010101 10101010 01010101
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
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?
1001₂, 10₁₀, C₁₆
10₁₀, 1001₂, C₁₆
10₁₀, C₁₆, 1001₂
C₁₆, 1001₁, 10₁₀
Answer explanation
Let’s convert each value to decimal. 10 (decimal) is 10 (decimal), 1001 (binary) is 9 (decimal), and C (hexadecimal) is 12 (decimal). So least to greatest is 1001 (binary), 10 (decimal), C (hexadecimal), or 9, 10, 11 (decimal)
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
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:
This color is mostly red.
This color is mostly green.
This color is mostly blue.
This color has no blue in it.
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