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WorksheetsY9M2A2 - Text and Images
Total questions: 11
Worksheet time: 28mins
Name
Class
Date
1.
What is ASCII?
a)
A character set for representing characters in binary.
b)
A character set for representing characters in hexadecimal.
c)
A programming language
d)
None of the above
2.
How many bits are used to store ASCII characters?
a)
7
b)
8
c)
10
d)
4
3.
What is the difference between Unicode and ASCII?
a)
Unicode repesents characters that are used universally and represents more languages.
b)
There is no difference.
c)
Unicode uses 8 bits.
d)
Unicode is only used on websites.
4.
How many bits are used to store a text file with 60 characters using ASCII?
a)
420 bits
b)
60 bits
c)
480 bits
d)
6 bits
5.
What is a pixel?
a)
A picture element represents the smallest part of a bitmapped image.
b)
A film company.
c)
Another name for an image.
d)
The number of colours that can be used to represent an image.
6.
What is colour depth?
a)
The number of colours that can be used to represent an image.
b)
The number of colours in each pixel.
c)
The size of an image.
d)
A picture element represents the smallest part of a bitmapped image.
7.
How many pixels are there in a 600x800 bitmap image?
a)
480,000 pixels.
b)
1400 pixels
c)
48,000 pixels
d)
600 pixels.
8.
How many colours can be represented using 4 bits?
a)
16
b)
4
c)
8
9.
What is the size of a bit map with an image resolution of 600x800 and a colour depth of 24 bits?
a)
11,520,000 bits
b)
Very large.
c)
480,000 bits
d)
1,000,000 bits.
10.
How does image resolution affect the size of a bitmap file?
a)
The larger the resolution, the more bits are needed to store all the pixels in the image.
b)
It doesn't.
c)
The smaller the resolution, the more bits are needed to store all the pixels in the image.
d)
The larger the resolution, less bits are needed to store all the pixels in the image.
11.
How does colour depth affect the size of a bitmap file?
a)
The more colours that can be used to create an image, the more bits are needed to store each pixel.
b)
It doesn't.
c)
The smaller the colour depth, the more bits are needed to store ech pixel.
d)
The larger the colour depth, less bits are needed to store each pixel.
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