Digital Electronics mcq questions answers part2

Q1. Minimum number of MOS required to make a dynamic RAM is
(A) 1
(B) 2
(C) 3
(D) 4

Q2. Dual slope ADC
(A) Works on principle of weighted resisters
(B) Minimizes the effect of power supply interference
(C) Requires very complex hardware
(D) Requires a conversion timer of the order of a few seconds

Q3. A flash ADC is a:
(A) Requires DAC
(B) Tracking A/D converter
(C) Requires very complex hardware
(D) None of these

Q4. Which of the following is minimum error code?
(A) Grey code
(B) Binary code
(C) Excess 3 code
(D) BCD

Q5. Popular application flip-flop is?
(A) Shift registers
(B) Counters
(C) Transfer registers
(D) All of these

Q6. Which of the following is known as universal gate?
(A) AND
(B) OR
(C) NOT
(D) NAND

Q7. The schmitt trigger may be used to?
(A) change voltage to corresponding frequency
(B) Change frequency to voltage
(C) Square slowly varying input
(D) All of these

Q8. Which of the following bipolar technology has smallest propagation delay?
(A) TTL
(B) DTL
(C) ECL
(D) Bi CMOS

Q9. For the NAND gate, what is the output when both inputs are HIGH:
(A) HIGH
(B) LOW
(C) HIGH or LOW
(D) cannot be determined

Q10. Mod-6 and mod-12 counters are most commonly used in:
(A) digital clocks
(B) counters
(C) multiplexed displays
(D) multiplexer

Q11. For the OR gate, what is the output when both inputs are HIGH:
(A) HIGH
(B) LOW
(C) HIGH or LOW
(D) cannot be determined

Q12. Which of the following is true regarding ring and Johnsons counter:
(A) ring counter has an inverted feedback path
(B) ring counter has fewer flip-flops but requires more decoding circuitry
(C) johnson counter has an inverted feedback path
(D) johnson counter has more flip-flops but less decoding circuitry

Q13. The output of an AND gate is LOW when
(A) all the time
(B) any input is LOW
(C) all inputs are HIGH
(D) any input is HIGH

Q14. What type of register would shift a complete binary number in one bit at a time and shift all the stored bits out one bit at a time?
(A) SIPO
(B) PIPO
(C) SISO
(D) PISO

Q15. A simple flip-flop is
(A) 1 bit memory
(B) 2 bit memory
(C) four state device
(D) has no memory

Q16. To operate correctly, starting a ring counter requires:
(A) clearing all the flip-flops
(B) presetting all the flip-flops
(C) presetting one flip-flop and clearing all the others
(D) clearing one flip-flop and presetting all the others

Q17. A ripple counter speed is limited by the propagation delay of:
(A) each flip-flop
(B) only circuit gates
(C) all flip-flops and gates
(D) None of these

Q18. Which of the following can be used as a parallel to serial converter?
(A) MUX
(B) DEMUX
(C) Decoder
(D) Encoder

Q19. question
(A) option2
(B) option3
(C) option4
(D) answer

Q20. Dual slope ADC0
(A) Works on principle of weighted resisters0
(B) Minimizes the effect of power supply interference0
(C) Requires very complex hardware0
(D) Requires a conversion timer of the order of a few seconds0