Q1. What are the inputs of jk flip flop in toggle mode ?
(A) j=0 k=1
(B) j=1 k=0
(C) j=0 k=0
(D) j=1 k=1
Answer: j=1 k=1
Explanation:
Q2. Race around condition always arise in a
(A) Digital circuit
(B) Combination circuit
(C) Asynchronous circuit
(D) Synchronous circuit
Answer: Asynchronous circuit
Explanation:
Q3. A circuit consists of 7 NOT gates connected in cascade, it acts like
(A) A non inverter
(B) An inverter
(C) A controlled inverter
(D) Converter
Answer: A controlled inverter
Explanation:
Q4. Which logic is mostly used in microprocessor chips
(A) TTL
(B) CMOS
(C) NMOS
(D) DTL
Answer: CMOS
Explanation:
Q5. what is the frequency of DC signal
(A) 0
(B) 100
(C) 1
(D) 10
Answer: 0
Explanation:
Q6. which of the following codes is an unweighted code?
(A) Excess 3 code
(B) 8421
(C) 2421
(D) 63210
Answer: Excess 3 code
Explanation:
Q7. The bipolar technology giving the fastest logic family is
(A) ECL
(B) DTL
(C) TTL
(D) none of these
Answer: ECL
Explanation:
Q8. Which of the following is not a magnetic memory?
(A) tape
(B) drum
(C) disk
(D) Flip-flop
Answer: Flip-flop
Explanation:
Q9. Mnemonic symbols are used
(A) to denote address
(B) to employ hamming code
(C) to assist human memory
(D) to denote errors
Answer: to assist human memory
Explanation:
Q10. Which of the following logics has excellent noise margin?
(A) TTL
(B) ECL
(C) CMOS
(D) All of the above
Answer: CMOS
Explanation:
Q11. which of the following codes is a weighted code?
(A) 5111 code
(B) excess-3 code
(C) shift counter code
(D) gray code
Answer: 5111 code
Explanation:
Q12. The number of comparator circuits required to build a 3 bit simultaneous A/D converter is
(A) 8
(B) 7
(C) 15
(D) 16
Answer: 7
Explanation:
Q13. The bit size of first practical microprocessor was
(A) 4 bit
(B) 2 bit
(C) 8 bit
(D) 4 bytes
Answer: 4 bit
Explanation:
Q14. how many pins intel 8080 has?
(A) 28
(B) 36
(C) 40
(D) 42
Answer: 40
Explanation:
Q15. which type of computers accuracy is super high
(A) digital
(B) optical
(C) hidden
(D) hybrid
Answer: digital
Explanation:
Q16. a Morden digital computer has :
(A) extremely high speed
(B) large memory
(C) almost unlimited array
(D) all of the above
Answer: all of the above
Explanation:
Q17. the 74xx series has fan out of
(A) 10
(B) 8
(C) 50
(D) 25
Answer: 10
Explanation:
Q18. TTL operates from a________ volt power supply
(A) 9
(B) 3
(C) 12
(D) 5
Answer: 5
Explanation:
Q19. the_________ family of ICs has better noise immunity
(A) TTL
(B) ECL
(C) CMOS
(D) DTL
Answer: CMOS
Explanation:
Q20. ____is associated with third generation
(A) vaccum tubes
(B) translators
(C) IC
(D) data
Answer: IC
Explanation:
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