Electronics MCQ Questions and Answers
Electronics MCQ Questions with Answers are a key part of preparation for competitive exams like GATE, ISRO, DRDO, and ECIL. These questions assess understanding of fundamental topics such as semiconductors, amplifiers, transistors, and digital circuits. Each question includes clear explanations, helping students grasp key concepts in less time. Practicing electronics MCQs not only boosts technical knowledge but also enhances problem-solving skills needed in both interviews and online test rounds.
Electronics MCQ
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40 questions
31. Among the logic families, the family which can be used at very high frequency greater than 100 MHz in a 4 bit synchronous counter is
- TTLAS
- CMOS
- ECL
- TTLLS
32. An AND gate will function as OR if
- all the inputs to the gates are “1”
- all the inputs are ‘0’
- either of the inputs is “1”
- all the inputs and outputs are complemented.
33. An OR gate has 6 inputs. The number of input words in its truth table are
- 6
- 32
- 64
- 128
35. NAND. gates are preferred over others because these
- have lower fabrication area
- can be used to make any gate
- consume least electronic power
- provide maximum density in a chip.
36. In case of OR gate, no matter what the number of inputs, a
- 1 at any input causes the output to be at logic 1
- 1 at any input causes the output to be at logic 0
- 0 any input causes the output to be at logic 0
- 0 at any input causes the output to be at logic 1.
38. Excess-3 code is known as
- Weighted code
- Cyclic redundancy code
- Self-complementing code
- Algebraic code.
39. Assuming 8 bits for data, 1 bit for parity, I start bit and 2 stop bits, the number of characters that 1200 BPS communication line can transmit is
- 10 CPS
- 120 CPS
- 12CPS
- None of the above.
40. Indicate which of the following three binary additions are correct? 1.1011 + 1010 = 10101 II. 1010 + 1101 = 10111 III. 1010 + 1101 = 11111
- I and II
- II and III
- III only
- II and III