Code: mamElectronics & Comm. Eng.5th Semester2 Examination Papers

Microprocessor and Microcontroller

Official Bihar Engineering University examination question papers, marks distribution, and questions transcript. Available exam sessions: 2025, 2020.

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Official Exam Paper TranscriptB.Tech 5th Semester Examination, 2025
Bihar Engineering University, Patna
B.Tech 5th Semester Exam., 2025

Microprocessors and Microcontrollers

Time: 03 HoursCode: 104505Semester: VFull Marks: 70

Instructions:

  1. The marks are indicated in the right-hand margin.
  2. There are NINE questions in this paper.
  3. Attempt FIVE questions in all.
  4. Question No. 1 is compulsory.
Q.1 Choose the correct option / answer the following (Any seven question only):[2 x 7 = 14]

  1. Which interrupt has the highest priority in 8085?

    1. RST 5.5
    2. INTR
    3. RST 6.5
    4. TRAP

  2. Which signal indicates completion of data transfer?

    1. READY
    2. IO/M
    3. ALE
    4. SOD

  3. The 8255 has how many ports?

    1. 2
    2. 4
    3. 3
    4. 5

  4. Which mode of 8255 is used for simple I/O operations?

    1. Mode 0
    2. Mode 2
    3. Mode 1
    4. BSR mode

  5. Sample-and-Hold circuit is mainly used with

    1. DAC
    2. LCD
    3. ADC
    4. Stepper Motor

  6. Which controller is used for keyboard interfacing?

    1. 8255
    2. 8253
    3. 8279
    4. 8251

  7. The 8086 has how many general-purpose registers?

    1. 2
    2. 8
    3. 4
    4. 16

  8. Which register stores the address of next instruction?

    1. AX
    2. IP
    3. BX
    4. DX

  9. Which processor has on-chip cache memory?

    1. 8086
    2. 80386
    3. 80286
    4. 80486

  10. Which instruction changes program sequence?

    1. MOV
    2. JMP
    3. ADD
    4. ANL
Q.2 Solve both questions :[7 x 2 = 14]

  1. Draw and explain the architecture of the 8085 microprocessor.

  2. Discuss the timing diagram and machine cycle of the 8085.

Q.3 Solve both questions :[7 x 2 = 14]

  1. Explain different modes of operation of the 8255 PPI.

  2. Explain the architecture and operation of the 8251 USART.

Q.4 Solve both questions :[7 x 2 = 14]

  1. Explain the architecture and operation of Intel 8255.

  2. Explain memory organization in the 8086 microprocessor.

Q.5 Solve both questions :[7 x 2 = 14]

  1. Draw and explain the architecture of the 8086 microprocessor.

  2. Discuss the pin diagram and functions of the 8086 microprocessor.

Q.6 Solve both questions :[7 x 2 = 14]

  1. Explain different addressing modes of the 8086 with examples.

  2. Explain the data transfer instructions of the 8086 with examples.

Q.7 Solve both questions :[7 x 2 = 14]

  1. Discuss stack operations and subroutine calls in the 8086.

  2. Write an assembly language program for addition of two 16-bit numbers.

Q.8 Solve both questions :[7 x 2 = 14]

  1. Discuss memory organization in the 8051 microcontroller.

  2. Discuss logic instructions and control transfer instructions in the 8051.

Q.9 Write short note on any four of the following:[3½ x 4 = 14]

  1. Timing diagram

  2. 8251 USART

  3. 8086 Addressing modes

  4. PUSH and POP instructions

  5. Differentiate between hardware interrupts and software interrupts

Related Official Syllabus

Environmental Science

104505

Official BEU curriculum units & topics for this examination subject.

Unit 1.0: Ecosystem (9 hrs.)

Structure of ecosystem, Biotic & Abiotic components • Food chain and food web • Aquatic (Lentic and Lotic) and terrestrial ecosystem • Carbon, Nitrogen, Sulphur, Phosphorus cycle • Global warming - Causes, effects, process, Green House Effect, Ozone depletion

Unit 2.0: Air and Noise Pollution (7 hrs.)

Definition of pollution and pollutant • Natural and manmade sources of air pollution (Refrigerants, I.C., Boiler) • Air Pollutants: Types, Particulate Pollutants: Effects and control (Bag filter, Cyclone separator, Electrostatic Precipitator) • Gaseous Pollution Control: Absorber, Catalytic Converter • Effects of air pollution due to Refrigerants, I.C., Boiler • Noise pollution: sources, measurement of pollution level, Effects of Noise pollution

Unit 3.0: Water and Soil Pollution (10 hrs.)

Sources of water pollution, Types of water pollutants • Characteristics: Turbidity, pH, total suspended solids, total solids • BOD and COD: Definition, calculation • Waste Water Treatment: Primary methods: sedimentation, froth floatation • Secondary methods: Activated sludge treatment, Trickling filter, Bioreactor • Tertiary Method: Membrane separation technology, RO (reverse osmosis)

Unit 4.0: Soil Pollution (4 hrs.)

Causes, Effects and Preventive measures of Soil Pollution • Excessive use of Fertilizers, Pesticides and Insecticides, Irrigation, E-Waste

Unit 5.0: Renewable Sources of Energy (6 hrs.)

Solar Energy: Basics of Solar energy, Flat plate collector (Liquid & Air), theory, coating, advanced collector • Solar pond, Solar water heater, solar dryer, Solar stills • Biomass: Overview, thermal characteristics as fuel, anaerobic digestion, biogas production, utilization and storage • Wind energy: Current status, future prospects, Wind energy in India, environmental benefits and problem • New Energy Sources: Hydrogen energy, Ocean energy resources, Tidal energy conversion

View Complete 5th Semester Syllabus

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