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Microcontrollers & applications important questionsMost repeated in SPPU papers

These 21 questions appeared in more than one SPPU Microcontrollers & applications paper we have: 9 papers, from May 2023 to Nov 2025. The most-asked come first. Each one links to the papers it was asked in.

All Microcontrollers & applications papers and notes

Repeated questions

Endsem questions (17)

  1. 5×asked

    Draw and explain program memory organization of PIC18F4550.

    Nov 2025 ·May 2025 ·Nov 2024 ·Nov 2023 ·May 2023

  2. 5×asked

    State features of RTC and draw an interfacing diagram to interface it with PIC. Write an initialization program.

    Nov 2025 ·May 2025 ·Nov 2024 ·Nov 2023 ·May 2023

  3. 4×asked

    Design step by step and explain a PIC test board.

    Nov 2025 ·May 2025 ·Nov 2023 ·May 2023

  4. 4×asked

    Draw port structure of PIC18F4550 with SFRs used in programming. 2

    May 2025 ·Nov 2024 ·Nov 2023 ·May 2023

  5. 4×asked

    Write a program for 2.5 KHz and 50 % duty cycle PWM generation with N=4. fosc=10MHz.

    May 2025 ·Nov 2024 ·Nov 2023 ·May 2023

  6. 3×asked

    Explain the capture and PWM mode of PIC18F4550 in detail.

    Nov 2025 ·May 2025 ·May 2023

  7. 3×asked

    Explain functions of ALU in PIC18F4550 with example.

    May 2025 ·Nov 2024 ·May 2023

  8. 3×asked

    Write program to generate delay of 10 ms using timerl, 16 bit and no prescaler.

    May 2025 ·Nov 2024 ·May 2023

  9. 2×asked

    Draw the interfacing of LCD with PIC18F4550. Write C code to display "SPPU" on first line.

    Nov 2025 ·Nov 2024

  10. 2×asked

    State features of SPI and I2C protocols. Compare RS232 and RS485.

    Nov 2025 ·May 2024

  11. 2×asked

    Draw an interfacing diagram of 4×4 matrix keyboard and explain the concept of key detection.

    May 2025 ·May 2023

  12. 2×asked

    Draw an interfacing diagram of Home protection system with LED, Key, Motion Sensor, LCD, buzzer and relay connected to various port lines.

    May 2025 ·Nov 2023

  13. 2×asked

    Draw an interfacing diagram of LCD with PIC18F4550 and explain function of RS and EN.

    May 2025 ·May 2023

  14. 2×asked

    Draw and explain the block schematic of PIC18F4550 MCU unit.

    May 2025 ·May 2023

  15. 2×asked

    Draw and explain the Timer 0, 8bit operation of PIC18F4550 compare the Timer 0,1, and 2.

    May 2025 ·May 2023

  16. 2×asked

    Explain the criteria for choosing PIC18F184550 Microcontroller.

    May 2025 ·May 2023

  17. 2×asked

    State features of SPI bus and compare RS232 and RS 485.

    May 2025 ·May 2023

Insem questions (4)

  1. 3×asked

    Draw and explain internal memory organization of 8051.

    Aug 2025 ·Oct 2024 ·Oct 2023

  2. 2×asked

    Enlist various modes of operation of Timer & Explain in details.

    Aug 2025 ·Oct 2023

  3. 2×asked

    State salient features of 8051 microcontroller.

    Aug 2025 ·Oct 2024

  4. 2×asked

    Compare RISC and CISC processor

    Oct 2024 ·Oct 2023

Questions count as repeated when their wording matches closely across papers. Numericals that depend on a figure are left out, since the figure changes from paper to paper.