Digital electronics. Part – 1

1. _____ gate is a two level logic gate.

A. EX-OR

B. AND

C. NAND

D. NOT

2. Which of the following functions is referred as the complementary?

A. NAND function

B. NOT function

C. NOR function

D. OR function

3. The value of 110111 in decimal system is,

A. 33

B. 22

C. 55

D. 11

4. Which logic gate is similar to the function of two series switches?

A. OR gate

B. NAND gate

C. AND gate

D. NOR gate

5. The combination of AND function and NOT function results in

A. inversion

B. NOR gate

C. OR gate

D. NAND gate

6. A toggle operation id used

A. With a flip-flop and a gate circuit

B. With a gate circuit

C. Without a flip-flop

D. With a flip-flop

7. According to boolean algebra 1+A+B+C is equal to

A. A+B+C

B. 1+ABC

C. 1

D. ABC

8. An XOR gate produces output only when two inputs are

A. High

B. Low

C. Different

D. Equal

9. According to De Morgan’s second theorem

A. a NAND gate is always complementary to an AND gate

B. an AND gate is equivalent to a bubbled NAND gate

C. a NAND gate is equivalent to a bubbled AND gate

D. a NAND gate is equivalent to a bubbled OR gate

10. For which of the following gate, the output will be one if all inputs are one

A. EX-OR gate

B. AND gate

C. NAND gate

D. NOT gate