Digital Electronics and Logic Design MCQs with answers Page - 40

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Q. With the use of an electronic counter six capsules are to be filled in bottles automatically. In such a counter what will be the number of flip- flops required ?

  • (A) 3
  • (B) 12
  • (C) 6
  • (D) 8

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Q. A pulse train can be delayed by a finite number of clock periods using

  • (A) a serial-in serial-out shift register
  • (B) a serial-in parallel-out shift register
  • (C) both (a) and (b)
  • (D) a parallel- in parallel- out shift register

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Q. How many illegitimate states has synchronous mod-6 counter ?

  • (A) 3
  • (B) 2
  • (C) 1
  • (D) 6

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Q. A 2 bit binary multiplier can be implemented using

  • (A) 2 input ands only
  • (B) 2 input xors and 4 input and gates only
  • (C) 2 input nors and one xnor gate
  • (D) nor gates and shift registers

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Q. Which of the following flip-flop is free from race-around problem ?

  • (A) q flip-flop
  • (B) t flip-flop
  • (C) sr flip-flop
  • (D) master- slave jk flip-flop

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Q. If the input J is connected through K input of J-K, then flip-flop will behave as a

  • (A) d type flip-flop
  • (B) t type flip- flop
  • (C) s-r flip-flop
  • (D) master slave jk flip-flop

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Q. Register is a

  • (A) set of capacitor used to register input instructions in a digital computer
  • (B) set to paper tapes and cards put in a file
  • (C) temporary storage unit within the cpu having dedicated or general purpose use
  • (D) part of the main memory

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Q. The number of flip-flops required in a decade counter is

  • (A) 3
  • (B) 4
  • (C) 8
  • (D) 10

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Q. If in a shift resistor Q0 is fed back to input the resulting counter is

  • (A) twisted ring with n : 1 scale
  • (B) ring counter with n : 1 scale
  • (C) twisted ring with 2n : 1 scale
  • (D) ring counter with 2 n : 1 scale

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Q. A 8-bit serial in / parallel out shift register contains the value “8”, clock signal(s) will be required to shift the value completely out of the register.

  • (A) 1
  • (B) 2
  • (C) 4
  • (D) 8

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