Electronics MCQ Question and Answer
Electronics MCQ Question and Answer
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
1.1011 + 1010 = 10101
II. 1010 + 1101 = 10111
III. 1010 + 1101 = 11111
- I and II
- II and III
- III only
- II and III