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WorksheetsData Representation
Total questions: 82
Worksheet time: 1hrs 9mins
Name
Class
Date
1.
What language do computers use?
a)
English
b)
Binary
c)
UNICODE
2.
Binary is base
a)
16
b)
10
c)
2
d)
32
3.
The binary chart we use to convert decimal to binary is
a)
16 14 12 10 8 4 2 1
b)
100 80 70 60 50 40 30 20 10
c)
128 64 32 16 8 4 2 1
d)
512 256 128 64 32 16 8 1
4.
A bit is
a)
a numerical label assigned to each device.
b)
the smallest unit of data in a computer.
c)
a keyboarding term for typing.
d)
is a numeral system made up of 16 symbols.
5.
A byte equals how many bits?
a)
2
b)
4
c)
8
d)
16
6.
What is a nibble?
a)
2 bits
b)
4 bits
c)
8 bits
d)
6 bits
7.
Decimal numbers are base
a)
2
b)
4
c)
8
d)
10
8.
Convert 11001001 to Denary.
a)
199
b)
200
c)
201
d)
202
9.
Convert 7A Hexadecimal to Binary.
a)
01111010
b)
01111000
c)
01110100
d)
01110010
10.
Convert 9C to Denary.
a)
155
b)
156
c)
157
d)
158
11.
Convert the hexadecimal nuber B2 to binary
a)
100011
b)
11011
c)
10110010
d)
10010010
12.
Convert the decimal number 20 to hexadecimal
a)
14
b)
11
c)
1B
d)
B0
13.
Convert the hexadecimal number 2C to decimal
a)
3A
b)
34
c)
44
d)
4A
14.
Convert 128 to binary
a)
10000000
b)
01111110
c)
10000001
d)
11001100
15.
Convert 65 to binary
a)
01100001
b)
00100001
c)
01000001
d)
00100101
16.
Convert 254 to binary
a)
11110000
b)
11111100
c)
11111111
d)
11111110
17.
Convert 37 to binary
a)
00100101
b)
00100011
c)
00100111
d)
01000101
18.
Convert 196 to binary
a)
11000110
b)
11100100
c)
11000100
d)
11010100
19.
Convert 00010001 to decimal
a)
17
b)
27
c)
37
d)
47
20.
Convert 11001100 to decimal
a)
224
b)
134
c)
104
d)
204
21.
Convert 11111111 to decimal
a)
255
b)
245
c)
235
d)
225
22.
Convert 00100100 to decimal
a)
26
b)
36
c)
46
d)
56
23.
Convert 01000100 to decimal
a)
58
b)
68
c)
78
d)
88
24.
What is the hexadecimal 3A in decimal?
a)
48
b)
58
c)
56
d)
46
25.
What is the hexadecimal 2D in binary?
a)
00011101
b)
00101110
c)
00101101
d)
00101011
26.
ASCII is
a)
the term given to printed files from the computer.
b)
an electronic device for storing and processing data.
c)
computer code
for representing
alphanumeric characters
for representing
alphanumeric characters
d)
is a numeral system made up of 16 symbols.
27.
Why do programmers use hexadecimal?
a)
To avoid very large and confusing binary numbers
b)
To prevent the computer decoding binary numbers
c)
To avoid small binary numbers
d)
Because they felt that binary was too simple.
28.
What is the hexadecimal number FF in denary?
a)
255
b)
256
c)
254
d)
257
29.
The biggest number you can make with 4 binary digits is _____
a)
15
b)
14
c)
13
d)
16
30.
What is 27 in hexadecimal
a)
1B
b)
17
c)
11011
d)
1C
31.
What is 126 in hexadecimal
a)
7E
b)
111110
c)
76
d)
7F
32.
What is 98 in hexadecimal
a)
62
b)
98
c)
AB
d)
69
33.
What is 184 in hexadecimal
a)
B8
b)
B4
c)
10111000
d)
9A
34.
What is 219 in hexadecimal
a)
DB
b)
DC
c)
BB
d)
ED
35.
What is 253 in hexadecimal
a)
FD
b)
11111101
c)
FF
d)
CD
36.
What is 19 in hexadecimal
a)
13
b)
10011
c)
19
d)
1A
37.
What is 12 in hexadecimal
a)
C
b)
12
c)
D
d)
B
38.
What is 142 in hexadecimal
a)
8E
b)
8F
c)
8B
d)
C2
39.
What is 102 in hexadecimal
a)
66
b)
67
c)
62
d)
6A
40.
What is Image Resolution?
a)
The number of pixels per inch
b)
how a picture appears on the screen
c)
How clear a picture is
41.
What is metadata
a)
It is very large data
b)
It is the data that is stored with every file which gives information about the file
c)
It is data that is compressed
42.
What Metadata is stored with an Image File?
a)
image size, bit depth (colour type), date/time, location, camera type, camera settings
b)
Sampling rate, bit depth, metadata
c)
Colour, resolution, who took the picture
43.
What does colour depth mean?
a)
It refers to the number of bits used to represent the colour.
b)
It refers to how deep the colours go
c)
it refers to the number of bytes in the colours
44.
How many colours do we get from 2 bits
a)
2 colours
b)
4 colours
c)
8 colours
d)
24 colours
45.
how many colours do we get from 4 bits
a)
2
b)
4
c)
8
d)
16
46.
How many colours do we get from 3 bits?
a)
2 colours
b)
4 colours
c)
8 colours
d)
24 colours
47.
How does image resolution affect file size?
a)
The more pixels per inch the greater the file size
b)
the bigger the screen the greater the size
48.
When a picture becomes blurry, what is the key-term for descibing what the picturehas become?
a)
Pick up truck
b)
Pixie letters
c)
Pixar
d)
Pixelated
49.
When we have a 'one-bit' colour, which are the only two binary numbers that are possibilities?
a)
00 and 11
b)
000 and 111
c)
0 and 1
d)
0000 and 1111
50.
How many combinations are there for a '2 bit' colour?
a)
8
b)
4
c)
16
d)
32
51.
A pixel is the _______ part of an image.
a)
Smallest
b)
Largest
52.
The colour of a pixel can be stored as a _______ number
a)
Unicode
b)
Hex
c)
Binary
d)
ASCII
53.
Each pixel is displayed using a combination of what three colours?
a)
Blue, green and purple
b)
Red, grey and white
c)
Red, green and blue
d)
White, red and blue
54.
Picture resolution refers to the concentration of pixels. How is it usually measured?
a)
Dots per inch (DPI)
b)
Dots per image (DPI)
c)
Pixels per inch (PPI)
d)
Pixels per image (PPI)
55.
What is meant by the term 'colour depth'?
a)
Width and height of an image.
b)
A pixel in an image.
c)
Quality of the colour.
d)
Number of bits used to encode each pixel.
56.
The higher the colour depth, the _________the image file size.
a)
Smaller
b)
Larger
57.
The higher the resolution, the ____ the file size.
a)
Smaller
b)
Larger
58.
The number of bits used to store the colour of each pixel is the:
a)
Resolution
b)
Bit Depth
c)
Sample Size
d)
Sampling Rate
59.
The number of pixels which make up a graphic is the:
a)
Bit Depth
b)
Sampling Rate
c)
Sample Size
d)
Resolution
60.
What are images made up of?
a)
Pixels
b)
Pixies
c)
Pictures
61.
What is meant by the resolution of an image?
a)
The number of pixels in an image
b)
The number of bits in each pixel
62.
What is meant by the bit depth of an image?
a)
The number of pixels in an image
b)
The number of bits in each pixel
63.
The higher the bit depth - the
a)
Larger the file size
b)
The more colours available
c)
Better the image quality
d)
All of the above
64.
What is a sampling rate?
a)
How many samples are taken a second
b)
The amount of characters in a data set
c)
The amount of pixels in an image
d)
The frequency
65.
If i had a higher sampling rate my piece of audio would take up
a)
More Space
b)
Less Space
66.
What is the sample rate measured in?
a)
BPS
b)
Hz
67.
The number of samples taken each second
a)
Bit Rate
b)
Sample rate
68.
What is the standard Sample Rate for recording a song?
a)
44KHz
b)
8KHz
c)
92KHz
69.
The number of bits used in each sample
a)
Sample Rate
b)
Bit Rate
70.
A continuous sound signal
a)
Analogue
b)
Digital
71.
A discrete (non-continuous) sound signal
a)
Analogue
b)
Digital
72.
What is the name of the system used to store text on a computer system?
a)
Sampling Rate
b)
ALU
c)
ASCII
d)
Floating Point
73.
What is compression?
a)
To convert one file to another
b)
To reduce the size of data to save space
c)
To minimise the time taken for a file to be download
d)
To compress something by pressing it hard
74.
What is Lossless Compression?
a)
No information is lost but file size is increased
b)
There is no loss of information at all after compression
c)
Files which have the exact same data after compression
d)
Compression involves an algorithm
75.
What type of compression does the ZIP format use?
a)
Lossy
b)
Lossless
76.
What type of compression would you use to compress a video?
a)
Lossy
b)
Lossless
77.
What type of compression would you use to compress a text file?
a)
Lossy
b)
Lossless
78.
When Lossy compression is used data is lost?
a)
True
b)
False
79.
Which of the following are not in a compressed format?
a)
JPEG
b)
MPEG
c)
Bitmap
d)
MP3
80.
Uncompressed audio and video files require less memory than compressed files....
a)
True
b)
False
81.
An mp3 is a compressed music file
a)
True
b)
False
82.
A jpeg is a compressed image file.
a)
True
b)
False
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