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KS3 Data Representation Revision

Total questions: 33

Worksheet time: 26mins

Name
Class
Date
1.

The number of digits in the decimal number system.

a)

2

b)

16

c)

255

d)

10

2.

The decimal number system is used by....

a)

Humans only

b)

Humans & Computers

c)

Computers Only

d)

Humans, computers and digital devices

3.

The binary number system has 2 digits to represent data, which are...

a)

1 to 10

b)

1 and A

c)

0 and 1

d)

1 and 2

4.

Select the correct statements about the binary number system.

a)

The binary number system is based on the powers of 10.

b)

A 'bit' of data can represent either 0 or 1

c)

Binary data is used primary by computers, but humans find it difficult to understand.

d)

Each hexadecimal digit is equivalent to 2 bits of binary data.

e)

The binary number system is based on powers of 2.

5.

Convert decimal 97 into binary.

a)

01100110

b)

01001001

c)

01100001

d)

10101010

6.

Convert decimal 125 into binary.

a)

01111000

b)

01010101

c)

11010101

d)

01111101

7.

Convert decimal 218 into binary.

a)

11011010

b)

11010111

c)

11011011

d)

00011111

8.
Convert 00010001 to decimal
a)
17
b)
27
c)
37
d)
47
9.
Convert 11001100 to decimal
a)
224
b)
134
c)
104
d)
204
10.
Convert 11111111 to decimal
a)
255
b)
245
c)
235
d)
225
11.
Convert 00100100 to decimal
a)
26
b)
36
c)
46
d)
56
12.
Convert 01000100 to decimal
a)
58
b)
68
c)
78
d)
88
13.
What is the answer to 010 + 010?
a)
110
b)
010
c)
100
d)
011
14.
What is the answer to 1010 + 0101?
a)
1011
b)
1001
c)
1111
d)
0111
15.
What is the answer to 0110 + 0101?
a)
1011
b)
1101
c)
1110
d)
1111
16.
Add binary numbers shown?
a)
01111011
b)
01101111
c)
01111101
d)
01101101
17.
Add binary numbers shown?
a)
01011010
b)
10011010
c)
10010101
d)
10100010
18.
What is this an example of?
a)
Overflow error
b)
8 bit binary addition
19.
Which one of these is an overflow error in an 8 bit binary number:
a)
11010101
b)
11110010
c)
110111011
d)
10101
20.
How do we know if a number is odd?
a)
It has a leading 0
b)
It doesn't have a leading 0
c)
It has a '0' in its 1s column
d)
It has a '1' in its 1s column
21.
In a logical _____ shift we multiply by 2 for each shift place.
a)
Left
b)
Right
c)
Right and Left
22.

What is the result of performing a logical left binary used of 1 to the following binary representation?


011101010

a)

01010101

b)

111010100

c)

110011010

d)

10101011

23.

State the number of shifts to left has been perform to the following representations.


Original representation: 10001010


Shifted Representation: 10100000

a)

1

b)

2

c)

3

d)

4

24.
What letters does hexadecimal use?
a)
A-F
b)
A-D
c)
P-W
d)
A-Z
25.
What does 'A' equal in denary?
a)
8
b)
9
c)
10
d)
11
26.
What is 130 in hexadecimal?
a)
82
b)
94
c)
66
d)
76
27.

Convert hexadecimal representation A9 into binary.

a)

1010 1011

b)

1010 1001

c)

1001 1001

d)

1110 0101

28.

Convert hexadecimal representation F6 into binary.

a)

1111 0110

b)

1111 1010

c)

1111 0101

d)

1111 0011

29.

Convert the binary representation 1101 1110 into hexadecimal.

a)

ED

b)

DE

c)

EC

d)

CE

30.
What is ASCII?
a)
alphabetical source code for Information integration
b)
Alpha source code for information exchange
c)
American Standard Code for Information Interchange
d)
A short code for converting letters
31.

How different characters can be representation in a standard 7 bit ASCII character map?

a)

10

b)

128

c)

256

d)

16

32.

Select the correct statements about ASCII.

a)

Different languages need particular characters maps, such as UNICODE.

b)

ASCII only representation letters and numbers.

c)

In the English/US standard keyboard, each letter (upper & lower case) is represented by a unique binary representation.

d)

The extended (8 bit) ASCII character set represents up to 256 characters.

33.

Hexadecimal representation is useful for

a)

Representation of decimal numbers.

b)

Representation of short binary representation - 1 or 2 bits.

c)

Representation of long binary representation..

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