Tribhuvan University
Bachelor of Information Technology
Semester 1 · TU Board 2078
Course Title: Digital Logics (BIT103)
Full Marks: 60Pass Marks: 24Time: 3 hours
Candidates are required to give their answers in their own words as far as practicable.
Group A
Attempt any Two questions.(2 × 10 = 20)
- 1.10
Design a combinational circuit with four inputs and one output. The output is equal to 1 when (i) all the inputs are equal to 1 or (ii) none of the inputs are equal to 1 or (iii) an odd number of inputs are equal to 1.
- 2.10
Implement the following function: F = ∑(0,1,3,4,5,8,9,10,15) using i) Decoder ii) Multiplexer iii) PLA
Answer comingAlso asked in 2083
- 3.10
What do you mean by race condition in JK Flip Flop and mention the methods to overcome it? Explain Master Slave Flip-flop using JK flip flop with logic circuit, truth table and timing diagram.
Group B
Attempt any Eight questions(8 × 5 = 40)
- 4.5
Convert (1011.110) into decimal and hexadecimal.
Answer comingAlso asked in 2077
- 5.5
Convert (51966.57)₁₀ into octal and hexadecimal number system.
Answer comingAlso asked in 2080, 2079
- 6.5
Subtract (111000.110)₂ — (110100.101)₂ using both 2's and 1's complement.
Answer comingAlso asked in 2079
- 7.5
State and prove De-Morgan's Theorems.
- 8.5
Define Half-subtractor with truth table and logic diagram.
Answer comingAlso asked in 2079, 2077
- 9.5
What is decoder? Implement 8 x 1 MUX using 4 x 1 MUX.
Answer comingAlso asked in 2079
- 10.5
What is clocked RS flip-flop? Explain with logic diagram and characteristic table.
- 11.5
Design Mod-3 synchronous counter.
Answer comingAlso asked in 2079
- 12.5
Draw a Parallel-In Parallel-Out Shift register and explain it.
Answer comingAlso asked in 2079
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