## Multiple Choice Questions and Answers on Digital Electronics

**Q1. The binary number 10101 is equivalent to decimal number …………..**

- 19
- 12
- 27
- 21

**Answer : 4**

**Q2. The universal gate is ………………**

- NAND gate
- OR gate
- AND gate
- None of the above

**Answer : 1**

**Q3. The inverter is ……………**

- NOT gate
- OR gate
- AND gate
- None of the above

**Answer : 1**

**Q4. The inputs of a NAND gate are connected together. The resulting circuit is ………….**

- OR gate
- AND gate
- NOT gate
- None of the above

**Answer : 3**

**Q5. The NOR gate is OR gate followed by ………………**

- AND gate
- NAND gate
- NOT gate
- None of the above

**Answer : 3**

**Q6. The NAND gate is AND gate followed by …………………**

- NOT gate
- OR gate
- AND gate
- None of the above

**Answer : 1**

**Q7. Digital circuit can be made by the repeated use of ………………**

- OR gates
- NOT gates
- NAND gates
- None of the above

**Answer : 3**

**Q8. The only function of NOT gate is to ……………..**

- Stop signal
- Invert input signal
- Act as a universal gate
- None of the above

**Answer : 2**

**Q9. When an input signal 1 is applied to a NOT gate, the output is ………………**

- 0
- 1
- Either 0 & 1
- None of the above

**Answer : 1**

**Q10. In Boolean algebra, the bar sign (-) indicates ………………..**

- OR operation
- AND operation
- NOT operation
- None of the above

**Answer : 3**