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Worksheets1.2c - Binary, Characters, Images, Compression (Revision Quiz)
Total questions: 40
Worksheet time: 32mins
Convert this binary number to denary
11001
(a)
Convert this binary nibble to hexadecimal
1100
(a)
Convert the hexadecimal digit F into binary
(a)
Which of the following is the binary number for 8B
11110011
00011011
10001011
10000111
Carry out a 3 place left shift on the binary number:
00110101
(Write your answer as an 8 BIT number!)
(a)
Carry out a 2 place left shift on the binary number:
00110111
(Write your answer as an 8 BIT number!)
(a)
Carry out a 3 place right shift on the binary number:
10111101
(Write your answer as an 8 BIT number!)
(a)
What is the effect of a 3 place left shift on a number?
x2
x4
x6
x8
x16
How many bits is used to represent each character in ASCII?
(a)
How many bits is used to represent each character in the Unicode character set?
16
8
4
24
How many different characters can be stored in the ASCII character set?
(a)
Which of the following is NOT True about using Unicode Character Set?
Enough space to store all major languages
File sizes are larger due to more bits being stored
File sizes are smaller than using ASCII character set
Uses either 16 or 32 bits to store each character
A Character Set is a collection of characters and their binary (a)
The string "BAG" is stored in ASCII.
Finish the ASCII values that would be used to store it.
66, 65 ......
69
70
71
72
Bitmap images are made up of lots of tiny dots called (a)
A pixel is a single block of (a) in an image
Which of the following best describes 'Colour Depth/Bit Depth'?
The height and width of an image in pixels
The total number of pixels in an image
A single dot of colour in an image
The number of bits used for each pixel
The height and width of an image are called the (a)
Which of the following best describes 'Resolution' of an image?
The height and width of an image in pixels
The number of pixels in an image (concentration)
A single dot of colour in an image
The number of bits used for each pixel
Which setting has been changed between the images below?
Colour Depth / Bit depth
Dimensions
Resolution
Metadata
Increasing the resolution of an image would...
Increase the file size, due to more bits being stored
Increase the number of colours available to use in the image
Reduce the file size of an image
Increase the quality of the image (more pixels = more detail)
What is the effect of increasing the Colour Depth/Bit depth of an image?
Height and Width of the image are increased
More colours available to use in the image
Better quality because more pixels are used
Smaller file size
This image of Mario uses 4 colours. What 'colour/bit depth' would be most suitable to store it as?
1 bit
2 bit
3 bit
4 bit
This image of Toad uses 6 colours. What 'colour/bit depth' would be most suitable to store it as?
1 bit
2 bit
3 bit
4 bit
Photos are normally stored as what colour/bit depth?
8 bit
16 bit
24 bit
32 bit
What is the term for this?
"Information stored with a file about its properties"
(a)
Give an example of 'Essential' Metadata required to display an image
(a)
Which of the following is essential metadata for an image?
Date taken
Author
Location of photo
Colour/Bit depth
Convert into denary...
01001111
(a)
Which of the following is NOT essential metadata for an image?
Resolution
Author
Dimensions
File Format (e.g. jpg)
Which compression is this?
"Compression that works by permanently removing data"
Lossless Compression
Lossy Compression
Which type of compression is this?...
Examples include JPG, MP3, AAC, AVI
Lossy Compression
Lossless Compression
Which type of compression is this?...
Examples include FLAC, TIFF, PNG
Lossy Compression
Lossless Compression
Which type of compression is this?...
+ No reduction in quality, original can be fully restored
+ Can be used on text and software files
Lossy Compression
Lossless Compression
Which type of compression is this?...
- Only a slight reduction in file size, but CAN be used on text and software files
Lossy Compression
Lossless Compression
Identify a 'Lossy' file type that could be used on Sound to compress a file.
(a)
Identify a 'Lossless' file type that could be used on software (.exe) to compress a file.
(a)
Identify a 'Lossless' file type that could be used on Images to compress a file.
(a)
Identify a 'Lossy' file type that could be used on Images to compress a file.
(a)
Identify a 'Lossless' file type that could be used on Sound to compress a file.
(a)
