
Computer Science Quiz
Authored by Kiers McFarlane
Computers
10th Grade
Used 1+ times

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40 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the technique for calculating the size (in bytes) of a sound file? (Mr Kiers)
Multiply the sample rate by bit depth, divide by channels
Multiply sample rate × bit depth × number of channels × length in seconds
Add sample rate and bit depth, then multiply by channels
Multiply sample rate by number of channels, ignore bit depth
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the technique for calculating the size (in bytes) of a bitmap image? (Mr Kiers)
Resolution × colour depth ÷ 8
Resolution ÷ colour depth × 8
Height × width × colour depth ÷ 8
Height + width × colour depth ÷ 8
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Explain what Hertz means. (Mr Kiers)
The number of bits per second
The number of cycles per second
The amount of memory per second
The number of colours per pixel
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is bit depth important when calculating the size of an image? (Mr Kiers)
It controls the resolution of the image
It defines how many colours each pixel can store
It changes the sampling rate of the image
It limits the file’s compression ratio
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a character set and why is it important in computing? (Mr Kiers)
A collection of fonts, important for designing websites
A group of binary codes representing text, needed for communication between computers
A set of symbols on a keyboard, important for typing speed
A programming library, important for running code
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Convert 10110110 into hexadecimal and then into denary. (Dita)
B6 (182)
A7 (167)
B6 (176)
C5 (197)
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the difference between an analogue and a digital signal? (Dita)
Analogue is discrete; digital is continuous
Analogue is continuous; digital is discrete
Both are continuous signals
Both are discrete signals
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