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Digital Logic | BSc.CSIT (TU) Question Paper 2073 | First Semester

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digital logic 2073First Semester | First Year | Tribhuvan University
Old Question Collection | Question Bank
Digital Logic, Year: 2073
Computer Science and Information Technology (CSc.111)

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Full Marks: 60 | Pass Marks: 24 | Time: 3 hours.

Candidates are required to give their answers in their own words as far as practicable.
The figures in the margin indicate full marks.

Long answer question
Attempt two questions (2×10=20)

  1. Explain the magnitude comparator and also design a logic diagram for 4 bit magnitude comparator.
  2. What do you mean by decoder? Design a 3 to 8 line decoder using 2 to 4 line decoder and explain it.
  3. What do you mean by ripple counter? Explain the design procedure of sequential circuits.
    Short answer questions
    Attempt any eight questions (2×10=20)
  4. Convert the following hexadecimal number to decimal and octal numbers.
    a) 4FF
    b) 6FED
  5. Explain the error detection code with example.
  6. Explain the duality theorem with example.
  7. Design half adder logic circuit using only universal gates.
  8. Draw a logic circuit of 8*1 multiplexer.
  9. Design the 4 bit parallel binary adder.
  10. Explain the PLA with the block diagram.
  11. Explain the R-S flip flop with truth table.
  12. Explain the shift register with example.
  13. Write short note on (any two):
    a) Binary counter
    b) State reduction
    c) Negative edge triggering
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