Q1. What is an input device?, A. A device that produces an action, B. A device that sends information into a computer or controller, C. A device that stores electricity, D. A device that provides mechanical movement, Q2. Which component detects changes in the environment?, A. Sensor, B. Motor, C. LED, D. Buzzer, Q3. Which component processes information and makes decisions?, A. Sensor, B. Actuator, C. Microcontroller, D. LED, Q4. Which of these is an actuator?, A. LDR, B. Ultrasonic sensor, C. Servo motor, D. PIR sensor, Q5. Complete the sequence: Sensor → ______ → Actuator, A. Battery, B. Microcontroller, C. Keyboard, D. Monitor, Q6. A smart classroom uses a PIR sensor to detect people. The ESP32 checks the light level and turns an LED on only when the room is dark. What is the correct sequence?, A. LED → ESP32 → PIR → Light, B. PIR + LDR → ESP32 → LED, C. ESP32 → PIR → LED → LDR, D. LDR → LED → PIR → ESP32, Q7. A soil moisture sensor gives the following reading:18% moisture. The program says: IF moisture < 30% THEN turn pump ON, What will happen?, A. Pump OFF because 18% is high, B. Pump ON because 18% is below 30%, C. Sensor turns OFF, D. ESP32 turns OFF, Which statement is correct?, A. The system needs only the PIR sensor., B. The PIR and LDR are inputs, the ESP32 processes the data, and the buzzer/LED are outputs., C. The buzzer is an input because it detects sound., D. The ESP32 is an actuator because it produces light., Which combination is MOST appropriate?, A. LDR + LED, B. Ultrasonic sensor + microcontroller + DC motors, C. Buzzer + microphone + printer, D. Soil moisture sensor + water pump, Q10. A smart greenhouse must:, A. DHT11 + soil moisture sensor → ESP32 → fan + water pump, B. LED → Arduino → keyboard, C. PIR → buzzer → soil moisture sensor, D. Motor → LDR → printer

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