Digital Lab Viva 4-1-25

Which gate generates the sum output in a half adder?

• OR

• AND

• XOR

• NAND

Which gate generates the carry output in a half adder?

• AND

• OR

• NOR

• XOR

What is the maximum number of inputs in a half adder?

• One

• Two

• Three

• Four

What is the sum output when both inputs are 1 in a half adder?

• 0

• 1

• 2

• Undefined

What is the carry output when inputs are 0 and 1 in a half adder?

• 0

• 1

• Undefined

• 2

How many inputs does a full adder have?

• Two

• Three

• Four

• Five

How many outputs does a full adder have?

• One

• Two

• Three

• Four

Which gate generates the carry-out in a full adder?

• XOR

• AND

• OR

• NAND

What is the carry output when all inputs are 1 in a full adder?

• 0

• 1

• Undefined

• 2

What is the number of full adders required to add two 4-bit numbers?

• One

• Four

• Eight

• Sixteen