Semester
Subject
Year
Bachelors In Information Technology
Institute of Science and Technology, TU
Digital Logic (BIT103)
Year Asked: 2079, syllabus wise question
Combinational Logic
1.
Design a BCD-to Seven-segment decoder to display decimal numbers 1, 2 and 4. [10]
2.
What is magnitude comparator? Design 2-bit magnitude comparator. [5]
3.
Define Half-subtractor with truth table and logic diagram. [5]
4.
What is decoder? Implement 8 x 1 MUX using 2 x 1 MUX. [5]
Counters, Registers and Memory
1.
Design Mod-5 synchronous counter using T- flip flop. [5]
2.
Draw a Serial-In Serial-Out Shift register and explain it. [5]
3.
Write short notes on: (Any two) a. BCD code b. Status Register c. Ring Counter [5]
Number Systems, Operations and Codes
1.
Convert into binary and decimal number system. [5]
2.
Subtract - using both 10's and 9's complement. [5]
Sequential Logic
1.
What are the drawbacks of clocked RS flip flop? Explain the operation of a JK flip flop along with its characteristic table, characteristic equation circuit diagram and timing diagram. [10]
2.
Design a sequential circuit using JK flip-flop with the help of given state diagram. 
[10]
3.
Design and explain the operational characteristics of D-flip flop. [5]