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WorksheetsData Representation Unit Revision Quiz
Total questions: 77
Worksheet time: 41mins
Name
Class
Date
1.
Bits are the smallest measure of data?
a)
True
b)
False
2.
A Nibble is
a)
1 byte
b)
3 bits
c)
1024 bits
d)
4 bits
3.
A byte is
a)
1024 kilobytes
b)
1 bits
c)
2 nibbles
d)
7 bits
4.
kB is a
a)
Kilometer
b)
Kilobyte
c)
Byte
d)
Kilibyterous
5.
What is bigger than a terabyte?
a)
Megabyte
b)
Terabyte
c)
Petabyte
d)
Zondabyte
6.
How many kilobytes in a gigabyte?
a)
4
b)
10000000
c)
1000
d)
1000000
7.
How many kilobytes in 3 megabytes
a)
1024
b)
3000
c)
3024
d)
3000000
8.
Binary only uses 2 digits?
a)
True
b)
False
9.
All data (images, sound, txt, videos) must be converted into binary to be stored/processed on/by a computer.
a)
True
b)
False
c)
True but also hex can be used to hold sound data
10.
What is 1001 in denary?
a)
8
b)
7
c)
9
d)
15
11.
What is 1110 in denary?
a)
15
b)
13
c)
14
d)
10
12.
What is 0001 0001 in denary?
a)
15
b)
16
c)
33
d)
17
13.
What is 0010 0010 in denary?
a)
34
b)
35
c)
40
d)
64
14.
What is 1111 0000 in denary?
a)
250
b)
240
c)
230
d)
245
15.
What is 1111 1110 in denary?
a)
250
b)
254
c)
255
d)
256
16.
What is 1011 1111 in denary?
a)
189
b)
202
c)
192
d)
191
17.
Add these binary numbers: 1111 + 1111?
a)
0001 1110
b)
0010 1110
c)
1111 1111
d)
0000 1110
18.
Add these binary numbers: 0011 + 0001 =
a)
0100
b)
1000
c)
1100
d)
0011
19.
Add these binary numbers: 0011 + 1001 =
a)
1100
b)
1111
c)
1110
d)
0111
20.
Add these binary numbers: 0010 1001 + 0100 1011 =
a)
01111100
b)
11110100
c)
01110101
d)
0111 0100
21.
Add these binary numbers: 0110 1101 + 0110 1011 =
a)
11011000
b)
11011100
c)
11011001
d)
11011111
22.
Hexadecimal numbers are shorter than binary?
a)
True
b)
False
23.
Hex is base 16, and a single hex character can represent any denary number from 0-15 and a binary nibble of 0-15?
a)
True
b)
False
24.
Convert Hex 17 to Denary?
*Remember to multiply by column
*Remember to multiply by column
a)
24
b)
17
c)
23
d)
45
25.
Convert Hex 25 to Denary?
*Remember to multiply by column
*Remember to multiply by column
a)
38
b)
39
c)
25
d)
37
26.
Convert Hex 1F to Denary?
*Remember to multiply by column
*Remember to multiply by column
a)
30
b)
29
c)
31
d)
32
27.
Convert Hex 3E to Denary?
*Remember to multiply by column
*Remember to multiply by column
a)
62
b)
60
c)
70
d)
65
28.
Convert Hex 1FF to Denary?
*Remember to multiply by column
*Remember to multiply by column
a)
5000
b)
511
c)
522
d)
544
29.
Convert Hex 2C to Denary?
*Remember to multiply by column
*Remember to multiply by column
a)
43
b)
44
c)
36
d)
55
30.
Convert hex B9 into binary?
a)
1011 1011
b)
1011 1101
c)
1011 1001
d)
1011 1111
31.
Convert hex FE into binary?
a)
1111 1110
b)
1111 1111
c)
1111 1010
d)
11111 1110
32.
Convert hex 55AF into binary?
a)
0101 0101 1110 1111
b)
0101 0101 1010 1111
c)
0111 0101 1010 1111
d)
1111 0101 1010 1111
33.
Convert hex 111112 into binary?
a)
0001 0001 0001 0001 0001 0010 0001
b)
0001 0001 0001 0001 0001 0010
c)
0001 0001 0001 0001 0001 0001
d)
0001 1001 0001 0001 0001 0010
34.
Convert binary 1100 into hex?
a)
F
b)
E
c)
D
d)
C
35.
Convert binary 1000 into hex?
a)
A
b)
B
c)
9
d)
8
36.
Convert binary 1001 1010 into hex?
a)
8E
b)
9A
c)
9B
d)
78
37.
Convert binary 1011 1111 into hex?
a)
BF
b)
BC
c)
BD
d)
BB
38.
Binary can be used to represent Characters such as ? $ £ ^ R e 9 6?
a)
True
b)
False
39.
Ascii is the most commonly used character set in the english speaking world. Each Ascii character is given .... bits which means it can represent a total of 128 characters.
a)
7
b)
8
c)
1024
d)
Byte
40.
Extended ASCII has 8 bit binary codes allowing for ....... characters?
a)
127
b)
128
c)
255
d)
256
41.
Which is the biggest character set?
a)
ASCII
b)
UNICORN
c)
ACSII
d)
Unicode
42.
Unicode tries to cover ever possible character?
a)
True
b)
False
c)
True except the Null key
d)
True except the Del Key
43.
In its most common form Unicode uses 16bit or .... bit character sets.
a)
34
b)
31
c)
32
d)
48
44.
Images are made up of binary bits?
a)
True
b)
False
c)
No they are made up of hex
45.
Colour depth is?
a)
Number of bytes used for each pixel
b)
Number of bits used for each pixel
c)
The density of pixels in an image
d)
Information stored in a image file which helps the computer to recreate image on screen
46.
Resolution is?
a)
Number of bytes used for each pixel
b)
Number of bits used for each pixel
c)
The density of pixels in an image
d)
Information stored in a image file which helps the computer to recreate image on screen
47.
Metadata is?
a)
Number of bytes used for each pixel
b)
Number of bits used for each pixel
c)
The density of pixels in an image
d)
Information stored in a image file which helps the computer to recreate image on screen
48.
What is the resolution of this image?
a)
3
b)
5
c)
18
d)
15
49.
What is the bit depth of this image?
a)
1
b)
2
c)
4
d)
8 bits
50.
What is the file size in bits?
a)
15 b
b)
15 B
c)
15 Kb
d)
8 bits
51.
What is the file size in bits?
a)
35 b
b)
64 B
c)
62 Kb
d)
64 b
52.
What is the file size in bytes?
a)
8 b
b)
64 B
c)
16 B
d)
8 B
53.
An image file is 14000 bits, how many kilobytes is this same file?
a)
1750 kB
b)
0.75 kB
c)
1.75 kB
d)
14 kB
54.
An image file is 38500 bits, how many kilobytes is this same file?
a)
3.8 B
b)
488 kB
c)
4.8 kB
d)
48 kB
55.
Sound is sampled and digitally stored digitally?
a)
True
b)
False
56.
Sampling Rate is?
a)
Samples taken per second
b)
Samples taken per minute
c)
Number of bits available for each sample
d)
Number of bytes avalaible for each sample
57.
Resolution (Sample Size) is?
a)
Samples taken per second
b)
Samples taken per minute
c)
Number of bits available for each
d)
Number of bytes available for each sample
58.
Formula for working out file size of a sound is?
a)
Sample Rate x Resolution x Mins of Audio
b)
Sample Rate x Resolution x Sec of Audio
59.
Advantage of lossy compression?
a)
Data only removed temporarily
b)
Can be used on txt files
c)
Greatly reduced file size, meaning more files can be stored
d)
No reduction in quality
60.
Advantage of lossless compression?
a)
Lots of software can read these files
b)
Can be used on txt files
c)
Greatly reduced file size, meaning more files can be stored
61.
Disadvantage of lossy compression?
a)
only a slight reduction in file size
b)
cant be used on txt file
62.
Disadvantage of lossless compression?
a)
only a slight reduction in file size
b)
cant be used on txt file
63.
What is compression?
a)
To convert one file to another
b)
To reduce the size of data to save space
c)
To minimize the time taken for a file to be downloaded
d)
To compress something by pressing it very hard
64.
What is Lossless Compression?
a)
No information is lost but file size is increased
b)
There is no loss in information at all after compression
c)
Files which have the exact same data after compression
d)
Compression that involves an algorithm
65.
What does Lossy Compression do to files?
a)
Increases the file size and keeps the same quality
b)
Eliminates no information at all
c)
Decreases the file size and keeps the same quality
d)
Eliminates unnecessary information in a file to reduce file size
66.
What type of compression would you use to compress a video?
a)
Lossy
b)
Lossless
67.
What type of compression would you use to compress a text file
a)
Lossy
b)
Lossless
68.
What compression is shown?
a)
Huffman Tree
b)
Huffman Grid
c)
Run Length Encoding
d)
ASCII Compression Tree
69.
What would "d" be encoded as using this compression technique?
a)
01100100
b)
11
c)
111
d)
0101
70.
What would "b" be encoded as using this compression technique?
a)
01100100
b)
100
c)
101
d)
0101
71.
Using RLE compress row 1 of image (assume 1 is black and 0 is white).
a)
21 10 20
b)
31 10 31
c)
11011
d)
11 30 11
72.
Using RLE compress row 2 of image (assume 1 is black and 0 is white).
a)
21 10 20
b)
31 10 31
c)
11011
d)
11 30 11
73.
Using RLE compress row 3 of image (assume 1 is black and 0 is white).
a)
21 10 20
b)
31 10 31
c)
50
d)
11 30 11
74.
What does binary shifting to the left X1 achieve?
a)
Multiplication by 2
b)
Division by 2
c)
Multiplication by 4
d)
Division by 4
75.
What does binary shifting to the right X2 achieve?
a)
Multiplication by 2
b)
Division by 2
c)
Multiplication by 4
d)
Division by 4
76.
How many bits is "CAD" using ascii?
a)
21b
b)
25b
c)
3b
d)
21B
77.
How many bytes is "Red Hot!" using extended ascii?
a)
8B
b)
7B
c)
6B
d)
21B
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