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WorksheetsBinary and Bitmaps
Total questions: 11
Worksheet time: 6mins
Which counting system uses only two digits?
Binary
Denary
How would you write 21 in binary?
10010
10101
11110
10001
What is the decimal number for 11001?
26
25
24
23
What are Bitmap pictures made up of?
squares
bitmaps
pixels
Which picture contains most bits?
Black and white
Picture
Drawing
how many colours can you have in an image using 2 bits per pixel?
1
2
4
8
How may bytes are there in a kilobyte?
100
1000
10000
1000000
Byte, kilobyte, Megabyte, ...... what size comes next?
Terabyte
Gigabyte
Petabyte
How many bytes are there in the word hello?
1
5
10
After an image file has been compressed using lossy compression the image is:
the same quality
lower quality
higher quality
How does lossless compression work?
repeating colours are replaced with instructions
some colours are removed
some pixels are removed
