
AQA A Level Computer Science

Quiz
•
Computers
•
12th Grade
•
Medium
Paul Baker
Used 46+ times
FREE Resource
70 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which regular expression matches the FSM?
a?bc(dc)*
a|b(cd)+
a+bc(dc)?
a(b|c)d*c*
2.
MULTIPLE SELECT QUESTION
1 min • 1 pt
Select the strings that are matched by the regular expression:
a(b|c)?d
abcbcbcbcd
acd
ad
acccd
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The Caesar cipher is an example of what type of cipher?
Substitution cipher
Transposition cipher
Public key encryption
Vernam cipher
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The letter m has an ascii code of 1101101. As part of a Vernam cipher, the key 0101001 is applied to that letter. What is the resulting ciphertext?
1000100
0111011
1100101
1101001
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The bit pattern 0110001 is sent with an even parity bit in the MSB position.
Which of these is the bit pattern receivedt?
00110001
10110001
01100011
01100010
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The bitmap image of the lemming is 6 pixels by 10 pixels. There are 16 available colours for each pixel. Calculate the file size of the image (not including any metadata) in bytes.
30
120
22.5
60
7.
MULTIPLE SELECT QUESTION
1 min • 1 pt
Which of these are advantages of vector graphics over bitmap graphics?
Can be rescaled without distortion
(Usually) a smaller file size
Ideal for photographic images
Each pixel can be modified individually
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