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

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.