Coding Systems 1 - AQA A Level Computer Science

Quiz
•
Computers
•
11th - 12th Grade
•
Hard
Ralph Ellis
Used 61+ times
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
How many different combinations of bit patterns can be represented using ASCII?
127
128
255
256
2.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
The ASCII value for the letter 'a' in binary is 110 0001. What is the binary ASCII value for the letter 'e'?
110 0010
110 0100
110 0101
110 0110
3.
MULTIPLE CHOICE QUESTION
20 sec • 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
4.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Data is received that had been sent using majority voting. The received bit pattern is 100 000 011 111.
What bit pattern does the receiving device interpret this as?
0011
1010
0001
1001
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The image shows how a modulo 11 check digit can be calculated.
Find the check digit for the string of digits 1 2 3 4 using modulo 11.
1
2
3
4
5
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
20 sec • 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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