Question 1
(a)
List out various logic families. Also list characteristics of digital IC.
3 Marks
(b)
Convert the decimal number 225.225 to octal and hexadecimal.
4 Marks
(c)
Implement AND, OR, EX-OR gates using NAND & NOR gates.
7 Marks
Gujarat Technological UniversityWinter 2025 Examination
GTU 3130704 Digital Fundamentals (DF) Winter 2025 Paper Solution & PDF
B.E. · Computer Engineering · Semester 3 · Subject Code: 3130704
Total Marks70 MarksExternal theory exam
Passing Marks23 Marks33% minimum cutoff
Exam Duration2.5 Hours10:30 AM – 1:00 PM
Paper Structure5 QuestionsWith internal OR choices
Question 2
(a)
Draw the logic diagram of 1-digit BCD adder.
3 Marks
(b)
State and prove De-Morgan’s theorems using truth-tables.
4 Marks
(c)
Design 3-bit even parity generator circuit.
7 Marks
OR OPTION
(c)
Design full adder circuit using decoder and multiplexer.
7 Marks
Question 3
(a)
Design half subtractor logic circuit.
3 Marks
(b)
Implement D flip flop using JK flip flop.
4 Marks
(c)
Design 2 - Bit Magnitude Comparator.
7 Marks
OR OPTION
(a)
Differentiate synchronous counter and asynchronous counter.
3 Marks
(b)
Draw & explain in brief the logic diagram of 4-bit bidirectional shift register.
4 Marks
(c)
Design a Combinational circuit that convert Binary to BCD code converter.
7 Marks
Question 4
(a)
Explain S-R clocked flip flop.
3 Marks
(b)
Explain the specification of D/A converter.
4 Marks
(c)
Design mod-6 asynchronous counter using T flip flop.
7 Marks
OR OPTION
(a)
List out and explain any one application of the register.
3 Marks
(b)
Design 4 X 16 decoder using two 3 X 8 decoders.
4 Marks
(c)
Design a 3-bit synchronous up counter using JK flip-flops.
7 Marks
Question 5
(a)
Compare SRAM with DRAM.
3 Marks
(b)
Draw & explain the block diagram of ALU.
4 Marks
(c)
Write a short note on FPGA.
7 Marks
OR OPTION
(a)
Explain classification of Memories.
3 Marks
(b)
Explain R-2R ladder type D/A converter.
4 Marks
(c)
Write a short note on ROM & its types.
7 Marks
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About this Examination Paper & Attribution
Official Gujarat Technological University (GTU) examination paper and step-by-step solutions for Digital Fundamentals (DF) (Winter 2025, B.E. · Computer Engineering, Sem 3). Features complete 70-mark regular & remedial examination pattern, official marking distribution across all 5 questions, and direct 1-click official PDF download.
Transcribed for student exam preparation from Gujarat Technological University official examination archives. Questions, syllabus guidelines, and curriculum marking schemes remain the intellectual property of Gujarat Technological University.