2.3.5 XOR, XNOR, and Binary Adders

What is the primary application of XOR gates?

• Subtractor circuits

• Memory circuits

• Multiplexer circuits

• Adder circuits

How many inputs does a half adder have?

• 1

• 2

• 3

• 4

What are the outputs of a full adder?

• Sum and Product

• Product and Carry-out

• Sum and Difference

• Sum and Carry-out

How many outputs does a half adder have?

• 1

• 3

• 2

• 4

What is the function of a carry-in (C_in) in a full adder?

• To store the sum

• To provide an initial carry value

• To reset the adder

• To invert the inputs

Which of the following is used for the least significant bit (LSB) only?

• XNOR Gate

• Half Adder

• XOR Gate

• Full Adder

What is the output of an XOR gate when both inputs are 0?

• Undefined

• 0

• 2

• 1

How can single bit adders be combined to handle multiple bits?

• By cascading them

• By using multiplexers

• By using decoders

• By using encoders

What is the output of a full adder when A=1, B=1, and C_in=1?

• Sum = 0, C_out = 0

• Sum = 0, C_out = 1

• Sum = 1, C_out = 0

• Sum = 1, C_out = 1