
Edexcel Computet Science Paper 1 Revision
Authored by D H
Computers
7th - 11th Grade
Used 1+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
An image is 100 pixels high and 10 pixels wide. Construct an expression to calculate how many pixels are needed to represent this image.
100/10=10
10/100=0.1
100*10=1000
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Convert 0101 1111 1001 1110 1010 0000 to hexadecimal.
7A 6B E4
5F 9E A0
F5 D6 7A
D5 B6 A8
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Convert the denary number 60 to 8-bit binary.
0011 1001
0110 0110
0001 1100
0011 1100
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Convert the 8-bit binary number 0010 0011 to denary.
35
42
33
27
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
show the result of 0010 0011 + 0100 1010
0111 1000
0110 1001
0111 1101
0110 1101
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Explain how an embedded system could control the headlights of a car.
A sensor could be used (with a microprocessor) to determine light level to activate a switch / turn on/off the headlights.
The headlights could be turned on via a switch in the car.
The headlights turn on when it gets dark.
The headlights are turned on using a button.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
how many bits are needed to represent the 26 capital letters A to Z.
5-bits because 2^5 represent up to 32 values.
4-bits because 2^4 represents 16 values
7-bits
3-bits
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