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Semester

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Bachelors Level/First Year/First Semester/Science bit/first semester/digital logic/syllabus wise questions

Bachelors In Information Technology

Institute of Science and Technology, TU

Digital Logic (BIT103)

Year Asked: 2081.2, syllabus wise question

Combinational Logic
1.
Design a combinational circuit that generates 9’s complement of a BCD number. [10]
2.
Explain the concept of decoder with an example. [5]
Counters, Registers and Memory
1.
List different memory types and explain basic memory operations. [5]
Digital Design Fundamentals and Boolean algebra
1.
Express the Boolean Function F=AB+B′CF = AB + B'C to sum of max terms with required truth tables. List two uses of sum of max terms. [8+2]
2.
Show that the dual of the exclusive-OR is equal to its complement. [5]
3.
Write short notes on (a) Universal gate. (b) Status register. [2.5+2.5]
Number Systems, Operations and Codes
1.
Perform A−BA - B with the given binary numbers using 1’s complement. A=1010100A = 1010100, B=1000100B = 1000100. [5]
2.
Perform the following conversion: (a) (0.625)10(0.625)_{10} to binary. (b) (173)8(173)_8 to decimal. [2.5+2.5]
Processor Logic Design
1.
Explain processor registers and ALU connection through common buses with a suitable diagram. [5]
Sequential Logic
1.
Differentiate between synchronous and asynchronous counter. Explain any one synchronous counter. [3+7]
2.
Explain JK flip flop with necessary diagram and truth table. [5]
Simplification of Boolean Functions
1.
Simplify the Boolean Function FF in sum of products using the don't-care conditions dd. F=B′C′D′+BCD′+ABCD′F = B'C'D' + BCD' + ABCD', d=B′CD′+A′BC′Dd = B'CD' + A'BC'D. [5]