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Signed Integers and Subtraction

Total questions: 24

Worksheet time: 4mins

Name
Class
Date
1.

What is true of an unsigned integer in denary?

a)
Always negative
b)
Can be positive or negative
c)
Represented using a sign
d)
Represented by the number alone
2.
What is the most significant bit used for in Sign and Magnitude representation?
a)
To indicate the magnitude
b)
To indicate the sign
c)
To indicate the base
d)
To indicate the decimal point
3.
In Sign and Magnitude, what does the binary number "1011" represent?
a)
-11
b)
-3
c)
3
d)
11
4.
What is the value of the binary number "01101" in Sign and Magnitude representation?
a)
-13
b)
-1101
c)
13
d)
1101
5.
In 2's Complement, what is the result when all bits are set to 1?
a)
0
b)
-1
c)
1
d)
-8
6.
How many representations does 2's Complement have for the value 0?
a)
One
b)
Two
c)
Three
d)
Zero
7.

Which of the following steps would not be used in this method of finding the negative equivalent of a value?

a)

Calculating the positive value

b)

Reversing the bits

c)

Adding 1

d)

Finding the most significant bit

8.

In one method of finding the negative equivalent of a value, the bits are reversed after finding the least significant 1.
Which bits are reversed?

a)
All bits
b)
Only the 1s
c)
Only the 0s
d)

All bits after the least significant 1

9.

There are two different methods for calculating the negative equivalent of a value.
Which method do you need to use in your exam?

a)

Finding least significant 1 and reversing bits

b)

Reversing bits and adding 1

c)

It does not matter

10.
In Sign and Magnitude, what does the binary number "1101" represent?
a)
-13
b)
-5
c)
5
d)
13
11.
What is the value of the binary number "00101" in Sign and Magnitude representation?
a)
-21
b)
-5
c)
5
d)
21
12.
In 2's Complement, what is the binary representation of the number -10?
a)
1010
b)
10110
c)
101010
d)
110101
13.
How would you represent the positive value 7 in 2's Complement?
a)

0111

b)
1000
c)
1110
d)
11001
14.
In Sign and Magnitude, what does the binary number "1000" represent?
a)

-0

b)

0

c)

8

d)

-8

15.
What is the 2's Complement representation of the number -18 in binary?
a)
10010
b)

101110

c)
111010
d)
1101
16.
What is the binary representation of the positive value 14 in 2's Complement?
a)

01110

b)
110001
c)
111000
d)
10111
17.
In Sign and Magnitude, what does the binary number "0100" represent?
a)
-4
b)
-2
c)
2
d)
4
18.
How would you represent the number -12 in 2's Complement?
a)

111000

b)

11100

c)

1100

d)

10100

19.
What is the value of the binary number "00110" in Sign and Magnitude representation?
a)
-6
b)
-22
c)
6
d)
22
20.

What is the negative equivalent binary of the positive value "0101"?

a)
101
b)
1011
c)
1101
d)
110
21.
If the positive binary value is "001110," what is its negative equivalent in 2's Complement?
a)
110010
b)
1110
c)
10010
d)
101101
22.
Convert the binary value "0011" to its negative equivalent using 2's Complement. What is the result?
a)
1101
b)
11
c)
100
d)
1011
23.
What is the 2's Complement representation in binary of the positive value "01111"?
a)
1111
b)
10001
c)
11111
d)
00000
24.
What is the 2's Complement representation of the positive binary number "0011100"?
a)
1100100
b)
11100
c)
100100
d)
1010011

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