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WorksheetsDigital Storage and Compression Quiz
Total questions: 27
Worksheet time: 14mins
Which of the following is NOT a unit of digital storage?
Bit
Byte
Nickel
Kilobyte
16 bits is equal to how many bytes?
1
2
4
8
The ASCII value of the letter “a” is:
65
66
90
97
How many colours can 2-bit colour depth represent?
2
4
8
16
Which is the correct formula for file size (in bytes)?
Height × Width × Colour Depth ÷ 8
Height × Width ÷ Colour Depth
Height × Width × Pixels ÷ 2
Height × Width × Colour Depth × 8
How many bytes are needed to store the word “BOOK”?
3
4
5
8
A kilobyte (KB) is equal to how many bytes?
100
512
1024
2048
Which is NOT an advantage of file compression?
Smaller storage needed
Faster transfer speed
Better quality of image
Easier to send by email
If you download a 300 MB file at 10 MB/s, how long will it take?
10 seconds
30 seconds
60 seconds
300 seconds
In 1-bit colour, the binary code “11” represents:
Black
White
Red
Gray
The correct formula to calculate file size in bits is:
Pixels ÷ Colour Depth
Width × Height × Colour Depth
File Size ÷ Bandwidth
Bandwidth × Transfer Time
The smallest piece of information a computer can store is a:
Pixel
Byte
Bit
Character
A group of 8 bits is called a:
Word
Byte
Kilobyte
Nibble
The tiny square that forms part of a digital image is called a:
Pixel
Bit
Vector
Colour depth
Images that can be scaled without losing quality are called:
Bitmap graphics
Vector graphics
Pixel graphics
Raster graphics
The delay before data begins transferring across a network is known as:
Bandwidth
Compression
Latency
Speed
You need an image that can be enlarged without becoming blurry. Which concept applies?
Bitmap Image
Vector Image
Pixel
Colour Depth
You compress a music file for faster download but lose some quality. Which concept applies?
Lossless Compression
Latency
Lossy Compression
File Size
You calculate how much space a video takes on your hard disk. Which concept applies?
Bandwidth
File Size
Vector Image
Bit
You measure how much data can pass through your internet in one second. Which concept applies?
Bandwidth
Latency
Compression
Pixel
How many seconds will it take Anna to upload her 2 GB video at 40 MB/s?
25
50
100
200
How long will it take Tom to download his 500 MB file at 25 MB/s?
10 seconds
20 seconds
25 seconds
30 seconds
What type of image format becomes blurry when enlarged?
Bitmap
Vector
Pixel
Lossless
Which type of compression keeps every detail?
Lossless
Lossy
Bandwidth
Latency
1 kilobyte is equal to how many bytes?
100
512
1024
2048
Which of the following best defines compression?
Reducing file size to save space and speed up transfer
Increasing file quality to improve resolution
Converting text into binary code
Making internet connection faster
What is the result of binary addition 110101 + 101011?
1010000
1011000
1100000
1011110
