AQA 4.6.4 Adders and Flip Flops

What is an adder?

• A type of flip-flop
• A type of memory unit
• A logic circuit used to add Boolean values
• A type of gate

What are the two types of adders?

• Half adders and full adders
• Half adders and quarter adders
• Full adders and double adders
• Full adders and quarter adders

What are the inputs and outputs of a half adder?

• Two inputs (A and B) and two outputs (S and C)
• Two inputs (data and clock signal) and one output (stored bit)
• Three inputs (A, B, and Cin) and two outputs (S and Cout)
• One input (data) and one output (stored bit)

What is the purpose of a full adder?

• To input three Boolean values and a carry bit from a previous operation
• To input two Boolean values and a carry bit from a previous operation
• To input two Boolean values and a stored bit
• To input three Boolean values and a stored bit

What is the truth table for a full adder?

• It has two inputs and three outputs

• It has three inputs and three outputs

• It has three inputs and two outputs

• It has two inputs and two outputs

What is the purpose of an edge-triggered D-type flip-flop?

• To generate clock signals
• To add Boolean values together
• To store the value of a single bit
• To synchronise numerous flip-flops

What are the inputs and outputs of an edge-triggered D-type flip-flop?

• Two inputs (A and B) and two outputs (S and C)
• One input (data) and one output (stored bit)
• Three inputs (A, B, and Cin) and two outputs (S and Cout)
• Two inputs (data and clock signal) and one output (stored bit)

What is the clock signal used for in an edge-triggered D-type flip-flop?

• To output the stored bit
• To generate data input
• To synchronise numerous flip-flops
• To set the value of the stored bit

What is the output of an edge-triggered D-type flip-flop?

• The value of the carry bit
• The value of the clock signal
• The value of the data input
• The value of the stored bit

What is the purpose of a carry bit in a full adder?

• To store the value of a single bit
• To synchronise numerous flip-flops
• To carry over the result of a previous operation
• To generate clock signals