Signed Integers and Subtraction

What is true of an unsigned integer in denary?

• Always negative
• Can be positive or negative
• Represented using a sign
• Represented by the number alone

What is the most significant bit used for in Sign and Magnitude representation?

• To indicate the magnitude
• To indicate the sign
• To indicate the base
• To indicate the decimal point

In Sign and Magnitude, what does the binary number "1011" represent?

• -11
• -3
• 3
• 11

What is the value of the binary number "01101" in Sign and Magnitude representation?

• -13
• -1101
• 13
• 1101

In 2's Complement, what is the result when all bits are set to 1?

• 0
• -1
• 1
• -8

How many representations does 2's Complement have for the value 0?

• One
• Two
• Three
• Zero

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

• Calculating the positive value

• Reversing the bits

• Adding 1

• Finding the most significant bit

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?

• All bits
• Only the 1s
• Only the 0s
• All bits after the least significant 1

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

• Finding least significant 1 and reversing bits

• Reversing bits and adding 1

• It does not matter

In Sign and Magnitude, what does the binary number "1101" represent?

• -13
• -5
• 5
• 13