(SEM IV) THEORY EXAMINATION 2021-22 DIGITAL ELECTRONICS

SECTION A — Short Descriptive Paragraph Required

, Section A asks basic theory questions such as binary codes, SOP vs POS, combinational logic, universal gates, latches, registers, asynchronous circuits, hazards, logic families, and memory. Each answer needs a short paragraph explaining the meaning of the concept clearly.

Extra sample questions (same pattern):
Explain half adder in a short paragraph.
Describe the importance of K-map in Boolean simplification.
What is a flip-flop? Explain briefly.

SECTION B — Medium-Length Descriptive Paragraph Required

 contains questions like XOR using NAND, serial vs parallel adders, JK flip-flop, state reduction, and RAM cell types. Each answer should be one full paragraph that explains the working, logic, or steps clearly and neatly.

Extra sample questions:
Explain the working of a multiplexer in one descriptive paragraph.
Describe synchronous counters in simple connected sentences.
Explain ROM and its structure briefly.

SECTION C — Long Description Paragraph Required

 has long questions such as Boolean minimization by K-map or Quine-McCluskey method, designing comparator, full adder/subtractor using NAND, JK-FF using T-FF, shift register operations, sequential circuit design, EEPROM structure, and PAL vs PLA. Each answer must be written as a long continuous paragraph, describing the process, diagram, or derivation in detail.

Extra sample questions:
Explain the complete working of a Johnson counter in a descriptive paragraph.
Describe how to design a 4-bit synchronous counter.
Explain the operation of a D-flip flop with truth table in long paragraph.