Here is quick quiz for Parallel Binary Adders to test your concepts.

- A parallel binary adder is a digital circuit that performs addition on
- Decimal numbers
- Hexadecimal numbers
- Octal numbers
- Binary numbers

- A half-adder circuit has … inputs and … outputs.
- 3,2
- 2,2

- A and B are the two inputs of a half-adder circuit. The sum output is given as
- A XOR B
- A.B’ + A’.B
- both a and b

- The half adder carry output is given by the following Boolean expression
- (A.B)’
- A.B
- ((A.B)’)’
- Both b and c

- 1-bit half adder accepts two binary digits A and B at its input. The bit width of each input is
- 2-bit
- 3-bit
- 1-bit

- The biggest drawback of a half-adder circuit is that:
- Accept carry from the previous states
- It can not generate carry
- Accept carry from the next stage

- A digital circuit that performs the arithmetic addition on two binary numbers is:
- subtractors
- Multipliers
- Adders
- Comparators

- In a half-adder circuit, having two inputs A=1 and B=1, what will be the sum and carry output?
- Sum=1, carry=1
- Sum=0, carry=0
- Sum=0, carry=1
- Sum=1, carry=0

- How many two-input NAND gates are required to implement a half-adder using NAND logic?
- 4
- 5
- 6

- How many two-input NOR gates are required to implement a half-adder circuit using NOR logic?
- 4
- 5
- 6

- A binary full adder performs addition on
- 2 bits
- 3 bits
- 4 bits

- A full adder can perform addition on … bits at a time.
- 1
- 2
- 3

- Sum=A XOR B is equal to
- A’.B’ + A.B
- A’.B + A.B’
- A’.B’ + A’.B

- If A, B and C are the inputs of a full adder then the sum equation of a full adder is …
- A NOT B NOT C
- A XOR B XOR C
- A OR B OR C

- To design a full adder circuit the number of XOR gates, AND gates and OR gates required are:
- 2, 2, 1
- 1, 2, 2
- 2, 1, 2

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