MCQ on Digital Electronics with Answers - 3

 

Multiple Choice Questions with Answers on Digital Electronics Circuits - Boolean Expression Simplification

1. A^/ + B^/ + C^/ = D represents a

    a. NOR gate

    b. AND gate

    c. NAND gate

    d. EX-OR gate

Ans: c

2. Output of which of the following gates is 1 only if at least one of its inputs is 0?

    a. NOR gate

    b. AND gate

    c. NAND gate

    d. EX-OR gate

Ans: c

3. Which gate has the output low only when both inputs are high?

    a. NOR gate

    b. AND gate

    c. NAND gate

    d. EX-OR gate

Ans: c

4. Which of the following Boolean algebra rules is correct?

    a. A. A^/ = 1

    b. A + A.B = A+B

    c. A + A^/.B = A+B

    d. A(A + B) = B

Ans: c

5. Which of the following statements is true?

    a. (A + B) (A + C) = AC + BC

    b. (A + B) (A + C) = AB + C

    c. (A + B) (A + C) = A + BC

    d. (A + B) (A + C) = AC + B

Ans: c

6. Which of the following is a universal gate?

    a. OR gate

    b. AND gate

    c. NOR gate

    d. EX-OR gate

Ans: c

7. Which of the following statements is not true?

    a. A + A^/  B = A

    b. A (A^/  + B) = AB

    c. AB+ AB^/ = A

    d. CA + CA^/  B = CA + CB

Ans: a

8. Which of the following is not functionally a complete set?

    a. AND, OR

    b. NAND

    c. AND, OR, NOT

    d. NOR

Ans: a

9. The NAND gate can function as a NOT gate if

    a. inputs are connected together

    b. inputs are left open

    c. one input is set to 0

    d. one input is set to 1

Ans: a

10. What is the minimum number of two input NAND gates used to perform the function of two input OR gate?

    a. one

    b. two

    c. three

    d. four

Ans: c

Hope this post on "MCQ on Digital Electronics with Answers - 3" will help Electronics Engineering and Electrical Engineering students in preparation of technical interviews, GATE, IES etc.