CS3691 Embedded Systems and IoT Previous Year Question Papers - Anna University

Access Anna University Embedded Systems and IoT (CS3691) previous year question papers on LearnSkart for smarter semester exam preparation. This Anna University PYQ page offers year-wise Anna University exam papers aligned with Regulation 2021, so students can understand recurring questions, important units, and expected marking schemes. You can view every CS3691 Embedded Systems and IoT question paper online and use free PDF download options for focused revision before internal and semester exams.

2024

2024 - CSE-AM-2024-CS 3691-Embedded Systems and IoT-170340446-50909.pdf

View Download
2024 - CSE-ND-2024-CS 3691-Embedded Systems and IoT-205807490-20250604161745 (25).pdf

View Download

Important Questions - CS3691 Embedded Systems and IoT

UNIT I: 8-Bit Embedded Processor

Part A (2 Marks)

List the features of the 8051 microcontroller.
How is a register bank selected in 8051?
State the function of the EA and PSEN pins.
What are the addressing modes available in 8051?

Part B (13/16 Marks)

8051 Architecture: Detailed block diagram and functional description.
Instruction Set: Explain the arithmetic, logical, and data transfer instructions with examples.
Timers/Counters: Explain the timer modes and programming with TMOD and TCON registers.
Interrupt Structure: Discuss the various interrupts and their priority levels.

UNIT II: Embedded C Programming

Part A (2 Marks)

Define RTOS and its characteristics.
What is context switching?
Difference between C and Embedded C.
List scheduling algorithms used in embedded systems.

Part B (13/16 Marks)

Scheduling Policies: Compare Rate Monotonic (RMS) and Earliest Deadline First (EDF) scheduling.
Interfacing: Draw and explain the interfacing of a matrix keyboard and LCD with 8051.
Multi-tasking & Processes: Explain task management and the different states of a task in RTOS.

UNIT III: IoT Infrastructure

Part A (2 Marks)

List the core characteristics of IoT.
What are Arduino shields?
Difference between sensors and actuators.

Part B (13/16 Marks)

IoT Architecture: Explain the functional components and basic building blocks of a typical IoT system.
Arduino Features: Discuss the types of Arduino boards, pin structures, and Arduino programming.
Sensor Integration: Explain how sensors and actuators are integrated with Arduino for real-time applications.

UNIT IV: IoT Protocols and Cloud

Part A (2 Marks)

Define ZigBee and its typical application range.
What are the states involved in a Bluetooth connection?
Mention the role of the GSM/GPRS module in IoT.

Part B (13/16 Marks)

Raspberry Pi: Detailed architecture and its applications in complex IoT systems.
Communication Protocols: Comparative study of Bluetooth, Wi-Fi, and ZigBee in terms of range and power.
GSM & GPS: Draw and explain the GSM architecture and how it supports mobile IoT communication.

UNIT V: Case Studies and Design

Part A (2 Marks)

Define a "Smart City" and its key characteristics.
What are the design metrics for embedded systems?
Explain the concept of smart irrigation.

Part B (13/16 Marks)

Embedded Design: Explain the complete design life cycle of an embedded system.
Home Automation: Architecture and implementation levels of smart lighting systems.
Healthcare & Agriculture: Detailed case studies on how IoT is used for remote health monitoring and smart farming.

Most Repeated / High-Weight Questions

8051 architecture and instruction set, IoT architecture and components, Arduino programming and interfacing, communication protocols (Bluetooth, ZigBee, Wi-Fi), case studies on smart cities and healthcare IoT applications.

Additional Resources

View Syllabus View Notes

How to Use These Question Papers

Unit-Wise Progression: Master Unit I (8051 processor architecture) as foundation. Dedicate 40% of time to Units II-III (embedded C programming and IoT infrastructure - most frequently tested).
Architecture & Interfacing: Draw block diagrams for 8051 and IoT systems. Practice keyboard/LCD interfacing circuits. These diagram-based questions appear with 13-16 marks regularly.
Protocol Comparison: Compare Bluetooth, Wi-Fi, ZigBee, and GSM protocols in terms of range, power consumption, and application scenarios. Understand trade-offs between each.
Case Study Analysis: Study smart city, agriculture, and healthcare case studies. Understand how IoT components integrate in real-world applications.
Time Management: Allocate 60-90 minutes per design or architecture problem; practice circuit diagrams and protocol comparisons under timed conditions.

Frequently Asked Questions about CS3691 Embedded Systems and IoT

Which topics are most critical in CS3691 exams?

8051 microcontroller architecture and instruction set (Unit I), embedded C programming with RTOS (Unit II), IoT infrastructure with Arduino (Unit III), and communication protocols (Unit IV) together account for 70% of exam marks. Unit V case studies appear with 13-15 marks combining multiple topics.

How should I approach 8051 architecture questions in CS3691?

Understand memory organization, register banks, and special function registers. Learn interrupt structure with priority levels and edge detection modes. Master addressing modes (immediate, direct, indirect, indexed). Practice writing simple 8051 assembly programs for mathematical operations.

What is the best strategy for IoT and Arduino questions in CS3691?

Understand IoT system architecture: sensors, microcontrollers, cloud servers. Master Arduino board features, pin structures, and digital/analog I/O programming. Practice connecting sensors (temperature, humidity) and actuators. These hands-on questions appear with 13-16 marks regularly.

How can I master communication protocols in CS3691?

Compare Bluetooth (short range, high power), Wi-Fi (medium range, medium power), ZigBee (short range, low power), and GSM (long range). Understand frequency bands, data rates, and power requirements. Know which protocol suits specific IoT applications. These comparison problems appear with 13-16 marks.

What should I prioritize in RTOS scheduling questions?

Understand context switching mechanism and task states (ready, running, blocked, suspended). Master Rate Monotonic Scheduling (RM) and Earliest Deadline First (EDF) algorithms. Practice scheduling feasibility analysis and task timeline construction. These scheduling problems appear with 13-16 marks.

How should I handle case study questions in CS3691?

Analyze real-world IoT systems: smart cities, healthcare monitoring, smart agriculture. Understand system architecture, component selection, communication protocols used. Identify design considerations and trade-offs. Practice writing detailed case analysis with hardware/software integration points.