Edexcel 22 Twos Complement

What is the smallest number that can be represented in binary using eight bits?

• -One

• One

• Eight

• Zero

In the context of binary numbers, adding ones in any column always results in what kind of value?

• A positive increase

• A negative decrease

• A reset to zero

• No change

What concept allows computers to represent negative numbers in binary?

• Two's complement

• Negative bit

• Binary subtraction

• One's complement

In two's complement, what does the most significant bit (MSB) represent?

• A negative value

• A positive value

• Zero

• The sum of all bits

How is the positive number 117 represented in binary using two's complement?

• 0 in the MSB and ones in the columns that add up to 117

• 1 in the MSB and zeros in all other columns

• 1 in the MSB and ones in the columns that subtract to 117

• 0 in all columns

What is the first step in converting a positive number to its negative version using two's complement?

• Write out the positive version of the number

• Subtract one from the most significant bit

• Swap all ones for zeros and zeros for ones

• Add one to the least significant bit

What happens after copying every value up to and including the first one from the right in the two's complement conversion process?

• Swap every one for a zero and every zero for a one

• Copy the remaining values without changes

• Add one to the final result

• Subtract one from the final result

What is the result of adding the binary representation of +12 and -12 in two's complement?

• A row of eight zeros

• The binary representation of 24

• The binary representation of -24

• A row of eight ones

What do all positive numbers start with in two's complement?

• A zero

• A one

• A three

• A two

What do all negative numbers start with in two's complement?

• A zero

• A two

• A three

• A one