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ENEX 201Bachelor in Electronics, Communication and Information Engineering · Semester 32 Papers Available

Microprocessors

Past examination question papers and complete curriculum syllabus for Microprocessors (ENEX 201), Bachelor in Electronics, Communication and Information Engineering Semester 3 under Institute of Engineering (IOE), Tribhuvan University.

Sem 3 Subjects (6)View Full Semester Overview →
ENSH 201Engineering Mathematics IIIENSH 204Communication EnglishENCT 201Computer Graphics and VisualizationENEX 201MicroprocessorsENEX 202Advanced ElectronicsENEE 204Control System
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Past Question Papers (PDF)

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3rd-sem_Microprocessors.pdf

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Most Frequently Asked Questions

Top recurring IOE board exam questions for Microprocessors with verified mark schemes, formula notation, and recurrence frequency.

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Year-wise & Session-wise Exam Papers

Complete questions from each exam session (Regular & Back exams from 2082 to 2069) for Microprocessors. Click any session paper to expand.

Showing 326 questions across 23 exam session papers
Institute of Engineering • 2082 Chaitra Board Examination
Q1[2 Marks]Introduction
Differentiate between microprocessor and micro controller. Explain fetch and execute cycle using RTL for instruction LXI B, 2050H.
Q2[6 Marks]Intel 8085 Microprocessor
There are 10, 8-bit data stored from memory location 7C00H. Copy data to 7C20H if is 1 & is 0, otherwise copy by flipping bit & , i.e. if is 1 change to 0 or vice versa and same for .
Q3[3 Marks]Intel 8085 Microprocessor
Define flags. Explain the flags associated with 8085 microprocessor.
Q4[5 Marks]Intel 8085 Microprocessor📐 Diagram in Paper
Draw and explain the timing diagram of MVI M. Also calculate the total execution time.
Q5[8 Marks]Intel 8086 Microprocessor
Draw the internal architecture of 8086 microprocessor. Explain flag register of 8086 microprocessor.
Q6[1 Marks]Intel 8086 Microprocessor
What are the reserved words in assembly language programming? What is a statement in assembly language programming? Write down the directives used in assembly language programming with examples.
Q7[5 Marks]Intel 8086 Microprocessor
Write assembly language program for 8086 that accepts string from the user and display each character in newline of a clear screen. Also display the total length of string.
Q8[6 Marks]Microprocessor System
What is the need of Programmable Peripheral Interface in microprocessor system? Design an address decoding circuit to interface one PROM of , one EEPROM of and one SRAM of with memory location starting at 3000H.
Q9[2 Marks]Microprocessor System
What is programmable peripheral interface (PPI)? Write down the different modes of operation available in PPI. Explain how different modes of PPPI can be used.
Q10[1 Marks]Interrupt Operations
What is Interrupt Service Routine. Explain how does 8086 responds to interrupts.
Q11[3 Marks]Advanced Topics
Discuss about Flynn’s Classification. Write the differences between RISC and CISC architecture.
Q12[8 Marks]Microprocessor System
Design an interfacing circuit for following problem. i) 74LS138:3 to 8 Decoder ii) 2732 (): EP-ROM address range should begin at 0000H and additional 4K memory space should be available for future explanation iii) 6116():CMOS R/W memory
Q13[8 Marks]Advanced Topics
Write the differences between RISC and CISC architecture.
Q14[8 Marks]Intel 8086 Microprocessor
Write down the directives used in assembly language programming with examples.
Q15[3 Marks]Introduction
Differentiate microprocessors and microcontrollers. Explain the bus organization of microprocessor with block diagram.
Q16[5 Marks]Intel 8086 Microprocessor
Write a program for 8085 microprocessor to transfer eight-bit numbers from A000H to B000H if bit D6 is 1 and D2 is
Q17[5 Marks]Intel 8085 Microprocessor
Otherwise transfer data by complementing bit D1 and D5. Assume there are ten numbers.
Q18[1 Marks]Intel 8086 Microprocessor
What are directives in assembly language programming? Explain different assembler directives used in assembly language programming.
Q19[6 Marks]Microprocessor System
Design address decoding circuit to interface two 1K EPROM and one 2K RAM consecutively using 3 to 8 decoder starting memory location 1000H.
Q20[1 Marks]Intel 8086 Microprocessor
Define PPI. Explain the operating modes of Intel 8255A PPI. Explain how control word is made.
Q21[1 Marks]Interrupt Operations
What is interrupt service routine? Explain different interrupt signals of 8085 microprocessor and how are they used.
Q22[3 Marks]Advanced Topics
Differentiate RISC and CISC processor architectures.

Curriculum Syllabus & Course Topics

Sourced from TU curriculum portal
Full Syllabus (PDF)
Chapter-wise Units & Micro-Syllabus Topics (6 Units)

  1. 1. Introduction

    • 1.1Introduction to microprocessors
    • 1.2History of microprocessors
    • 1.3Basic block diagram of a digital computer
    • 1.4Microcomputer and microcontroller
    • 1.5Bus organization of computer system
    • 1.6Stored program concept (Von Neumann’s architecture)
    • 1.7Processing cycle of a stored program computer

  2. 2. Intel 8085 Microprocessor

    • 2.1Features of 8085
    • 2.2Internal architecture of 8085
    • 2.3Pin configurations of 8085
    • 2.4Instruction format and data format
    • 2.5Addressing modes of 8085
    • 2.6Instruction set of 8085
    • 2.7Various programs in 8085
    • 2.7.1Simple programs with arithmetic and logical operations
    • 2.7.2Conditions and loops
    • 2.7.3Array and table processing
    • 2.7.4Decimal - BCD conversion
    • 2.7.5Multiplication and division
    • 2.8Instruction cycle, machine cycle and T-cycle
    • 2.9Timing diagrams of bus operations

  3. 3. Intel 8086 Microprocessor

    • 3.1Features of 8086
    • 3.2Internal architecture of 8086
    • 3.2.1BIU and components
    • 3.2.2EU and components
    • 3.2.3EU and BIU operations
    • 3.3Segment and offset address
    • 3.4Pin configurations of 8086
    • 3.5Addressing modes of 8086
    • 3.6Assembly language programming
    • 3.7High level versus low level programming
    • 3.8Assembly language syntax
    • 3.8.1Comments
    • 3.8.2Reserved words
    • 3.8.3Identifiers
    • 3.8.4Statements
    • 3.8.5Directives
    • 3.8.6Operators
    • 3.8.7Instructions
    • 3.9EXE and COM programs
    • 3.10Assembling, linking and execution
    • 3.11One pass and two pass assemblers
    • 3.12Interrupt services: INT 21H and INT 10H
    • 3.13Various programs in 8086
    • 3.13.1Simple programs for arithmetic, logical, string and input/output
    • 3.13.2Conditions and loops
    • 3.13.3Array and string processing
    • 3.13.4ASCII and decimal numbers operation
    • 3.13.5Displaying numbers in decimal, binary and hexadecimal formats

  4. 4. Microprocessor System

    • 4.1Memory classifications and hierarchy
    • 4.2Interfacing I/O devices and memory with 8085
    • 4.2.1Address decoding
    • 4.2.2Unique and non-unique address decoding
    • 4.2.3I/O mapped I/O and memory mapped I/O
    • 4.2.4I/O address decoding with NAND and block decoders
    • 4.2.5Memory address decoding
    • 4.3Parallel Interface
    • 4.3.1Modes: Simple, wait, single handshaking and double handshaking
    • 4.3.2Introduction to programmable peripheral interface (PPI)
    • 4.4Serial Interface
    • 4.4.1Synchronous and asynchronous transmission
    • 4.4.2Serial interface standards: RS232, USB
    • 4.4.3Introduction to USART

  5. 5. Interrupt Operations

    • 5.1Interrupt and its importance
    • 5.2Polling vs interrupt
    • 5.3Types of interrupts
    • 5.4Interrupts in 8085 and interrupt instructions
    • 5.5Interrupt service routine
    • 5.6Interrupt processing in 8085
    • 5.7Using programmable interrupt controllers (PIC)
    • 5.8Interrupt in 8086 and interrupt vector table
    • 5.9Interrupt processing in 8086

  6. 6. Advanced Topics

    • 6.1Harvard architecture
    • 6.2Accumulator based and register based architecture
    • 6.3Hardwired and microprogrammed control unit
    • 6.4RISC and CISC
    • 6.5Introduction to multiprocessing/multitasking
    • 6.6Digital signal processor

Examination Scheme & Marks Distribution

Evaluation Structure

  • Final Board Theory Exam: 60 Marks (Pass mark: 24)
  • Internal Assessment: 40 Marks (Pass mark: 16)
  • Practical / Lab Exam: 25 or 50 Marks (Continuous lab evaluation + viva, where applicable)

* This is the general current IOE 60/40 scheme; verify course-specific details in the syllabus above.

Exam Preparation Guidelines

  • Review the 2 available past examination papers to identify recurring patterns, core problem types, and chapter weightage.
  • Cross-reference key answers with official syllabus units, standard textbooks, and lecture notes.
  • Structure answers with labeled diagrams, concise bullet points, and highlight final answers in numerical solutions.
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Curriculum Syllabus & Marking Scheme