Tribhuvan University
Bachelor of Computer Application
Semester 1 · TU Board 2019
Course Title: Digital Logic (CACS103)
Full Marks: 60Pass Marks: 24Time: 3 hours
Candidates are required to answer the question in their own words as far as possible.
Group B
Attempt any SIX question.(6 × 5 = 30)
- 2.5
Subtract: 1010.110 - 101.101 using both 2's and 1's complement.
Answer comingAlso asked in 2026, 2022, 2021, Model question
- 3.5
Simplify (using k-map) the given Boolean function in both SOP and POS using the don't care condition if: f(A, B, C, D) = ℼ(0,1,3,7,8,12) ℼ d(5,10,13,14).
Answer comingAlso asked in 2022, 2021, 2020
- 4.5
Define decoder. Draw logic diagram and truth table of 3 to 8 line decoder.
Answer comingAlso asked in 2026, 2023, 2022, 2021, 2020
- 5.5
Define ROM. Implement the following combinational logic function using ROM:
- 6.5
What are the drawbacks of clocked RS Flip Flop? Explain the operation of JK Flipflop along with its circuit diagram and characteristic table.
- 7.5
What is T-Flip Flop? Explain clocked JK Flip-Flop with its logic diagram and truth table.
Answer comingAlso asked in 2024, 2021, 2020, Model question
- 8.5
Design MOD-7 counter with state and timing diagram.
Answer comingAlso asked in 2022, 2021
Group C
Attempt any TWO questions(2 × 10 = 20)
- 9.10
Define PLA. Design PLA circuit with given function. F1(A, B, C) = Σ(3,5,6,7) F2(A, B, C) = Σ(0,2,4,7) Design PLA Program table also.
- 10.10
Distinguish between sequential and combinational logic with example? Discuss the design procedure of combinational logic.
- 11.10
A sequential circuit with two D flip flops, A and B, two inputs x and y, and one output z, is specified by the following next state and output equations. A(t + 1) = x'y + xA B(t + 1) = x/B + xA z = B 1.Draw the logic diagram. 2.Derive the state
Answer comingAlso asked in 2022
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