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Worksheetsquizname = str(Data Representation)
Total questions: 21
Worksheet time: 25mins
Choose the correct option. (Be careful, tricks are everywhere!)
Hexadecimal is base 10
Binary is base 2
Binary is base 2 and decimal isn't base 10
Binary is base 1
Which of the following numbers is written in binary?
011334000
10110010
'This is a binary number'
10000&00
What is 1001010 in hexadecimal?
4A
4B
74
112
Why is hexadecimal better for programmers?
e = Mc^2
A binary number of length 8 would be 2 digits in hexadecimal
Its base 10 so more number options
What are you saying? Denary is easier!
What is 142 in binary AND hexadecimal? (Binary first)?
1001 1010 and 8E
1000 1110 and 7E
0100 1110 and 8E
1000 1110 AND 8E
Convert 8B to decimal format?
139
138
1000 1011
213
What is a Gigabyte in terms of Kilobytes? (assume 1000KB = 1MB e.t.c.)?
1,000,000,000,000 bytes
10^9
1,000,000 KB
8,000,000,000 Bits
What is the file extension for a JPEG file?
example.jpg
example.JQG
example.jpeg
example.imovietrailer
What is 1001 1010 added to 0101 0101?
1010 0001
0101 1110
1010 0010
I don't know
What is 'G' in ASCII, if 'H' is 0100 1000?
0100 0111
0100 0001
1000 1110
0010 1110
How many bits is extended-ASCII?
16 bits
32 bits
8 bits
7 bits
How many bits is Unicode UTF-32?
32 bits obviously
8 bits
doesn't exist
16 bits
Do you prefer Unicode or ASCII?
Unicode
ASCII
Extended ASCII
I don't have a favourite.
How many colours can a 16 bit image display?
256
65,536
100,000
128
In what format do computer's store sound files?
Digital
Decimal
Analogue
CISW (Computer Interpretation of Sound Waves)
How do you calculate the Bit Rate?
Bit Rate = Sampling Rate * Sampling Resolution.
Bit Rate (amount of Bits per second) = Sampling Rate / Sampling Resolution.
Bit Rate (amount of Bits per second) = Sampling Rate + Sampling Resolution.
Bit Rate = Sampling Rate * Sampling Resolution.
Calculate the file size of 10 seconds of audio at 8,000 Hz with a 4-bit sample resolution.
8000 * 4 * 10
32000 Bits
30000 KB
40 MB (assuming 1000KB = 1 MB)
What type of compression loses no part of the detail of the file?
Lossy
Lose-All-The-Detail
Apple Loseless iTunes
Loseless
What is Run Length Encoding?
aaaaabbbbccc --> 5a4b3c
RLE
aaaaabbbbccc --> 4a3b3c
hello --> he2lo
Can you use RLE to compress an image?
No
Yes
Maybe
I don't know
Did you enjoy the quiz? (1 is not at all and 5 is really fun.)
5
4
3
2
1
