Digital Logic: CSIT 1st Semester Exam Question

Digital Logic: CSIT 1st Semester Question

Tribhuvan University, Institute of Science and Technology Complete Digital Logic, CSC116, on 2080/02/29. Here, you can find Physics (B.Sc. CSIT) 1st Semester Exam Questions 2080.

Digital Logic: CSIT 1st Semester Exam Question 2080

University Tribhuvan University
Institute Institute of Science and Technology
Year 2080
Level Bachelor
Semester First (1st)
Course Computer Science and Information Technology
Subject Digital Logic (CSC 116)
Course Type New
Full Marks 60
Pass Marks 24
Time 3 hours

CSC116-2080 (New)

Tribhuvan University
Institute of Science and Technology
2080

Bachelor Level / First Year/ First Semester/ Science
Computer Science and Information Technology (CSC116)
(Digital Logic)

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

Section A


Attempt any TWO questions                                           [2×10=20]

1. What is combinational circuit? Design a combinational circuit with four inputs lines that represent a decimal digit in BCD and four output lines that generate the 1's complement of the input binary patterns.


2. What is asynchronous counter? Design synchronous counter that counts the sequences of 0- 1-4-6-7 using T flip-flop.


3. Implement the Boolean function F(P,Q,R,S)= Σ (3,4,6,8,9,14) using:
  • a. 8 to 1 multiplexer
  • b. PLA
  • c. Decoder

Section B


Attempt any EIGHT questions. (8×5=40)


4. Perform the following operations:

  • a. (011101)2 - (110011)2 using 2's complement
  • b. (89344)10 - (98654)10 using 9's complement


5. If f(P,Q,R,S)= Σ (3,4,7,8,14) and d(P,Q,R,S)= (1,6,9,13). Simplify it using K-map and design circuit using minimum number of NAND gates.


6. What is drawback of RS Flipflop? Explain D Flip Flop in detail with Logic Diagram, characteristics table and Characteristics equation.


7. Design a full subtractor with necessary tables and logic diagram.


8. What is shift register? Explain 4-bit SISO and PIPO with timing Diagram.


9. Design an asynchronous Mod 11 up counter using T flip flop.


10. How race condition in JK flip flop can be resolved? Explain.


11. What is decoder circuit? Design 3 to 8 decoder circuit.

Iswori

Iswori Rimal is the author of iswori.com.np, a popular education platform in Nepal. Iswori helps students in their SEE, Class 11 and Class 12 studies with Complete Notes, important questions and other study materials.

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