Virtual Labs

Simulation of establishing master slave model using Arduino and I2C Protocols

1. What is the working principle of I2C communication?

a: Single-wire asynchronous communication Explanation

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b: Master–slave communication using clock and data lines Explanation

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c: Parallel data transfer Explanation

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d: Wireless data communication Explanation

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2. Which statement correctly compares I2C with SPI and UART?

a: I2C uses more wires than SPI Explanation

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b: UART supports multiple slaves like I2C Explanation

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c: I2C uses fewer wires than SPI and supports multiple devices Explanation

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d: SPI is slower than I2C Explanation

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3. Why are pull-up resistors required on SDA and SCL lines?

a: To increase communication speed Explanation

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b: To keep lines at logic HIGH when idle Explanation

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c: To reduce clock noise Explanation

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d: To protect the microcontroller Explanation

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4. How does the master identify the correct slave?

a: Using pin numbers Explanation

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b: By matching device frequency Explanation

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c: By calling the slave's unique address Explanation

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d: By detecting voltage levels Explanation

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5. Which of the following is a real-life IoT use case of I2C?

a: Controlling DC motors in robotics Explanation

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b: Reading temperature sensor data with an OLED display Explanation

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c: Communicating with Wi-Fi routers Explanation

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d: Sending audio signals to speakers Explanation

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6. What happens if two slaves share the same address?

a: Communication becomes faster Explanation

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b: Both slaves respond causing data collision Explanation

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c: One slave automatically turns off Explanation

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d: Master blocks communication Explanation

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7. How can a slave send data back to the master?

a: By initiating communication itself Explanation

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b: When master sends a read command Explanation

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c: By generating its own clock pulse Explanation

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d: By using external interrupts Explanation

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8. Why is clock synchronization important in I2C?

a: It increases voltage stability Explanation

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b: It ensures all devices communicate at the same speed Explanation

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c: It provides wireless synchronization Explanation

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d: It reduces the number of wires Explanation

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9. How does I2C reduce wiring complexity?

a: Uses a separate wire for each slave Explanation

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b: Uses high-speed serial communication Explanation

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c: Uses only two wires for all devices Explanation

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d: Eliminates the need for ground connection Explanation

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10. Why is I2C preferred in multi-sensor IoT devices?

a: High speed for large data transfer Explanation

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b: Ability to connect many sensors with minimal pins Explanation

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c: Works only with analog sensors Explanation

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d: Requires no addressing Explanation

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