Coding Systems 1 - AQA A Level Computer Science

Coding Systems 1 - AQA A Level Computer Science

11th - 12th Grade

10 Qs

quiz-placeholder

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Coding Systems 1 - AQA A Level Computer Science

Coding Systems 1 - AQA A Level Computer Science

Assessment

Quiz

Computers

11th - 12th Grade

Hard

Created by

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

Media Image

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

Media Image

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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