IoT QUIZ

Question 1

Which of the following components is used to control electrical power to a pump in an IoT system?

Accepted Answer

Relay Module

Question 2

In Blynk, what does a virtual pin (like V0) represent?

Accepted Answer

A software based reference for linking app and device data

Question 3

Which command is used in ESP32 to get the local IP address after connecting to Wi-Fi?

Accepted Answer

WiFi.localIP()

Question 4

Which of the following is used to store historical sensor data in an IoT web application?

Accepted Answer

Database

Question 5

Which of the following is a true benefit of using ESP32 over Arduino Uno in IoT projects?

Accepted Answer

Built-in Bluetooth and Bluetooth

Question 6

What does WiFi.begin(ssid, password); do in your ESP32 setup code?

Accepted Answer

Sets the board to receive Wi-Fi

Question 7

Which GPIO pin mode should be used to control a relay module using ESP32?

Accepted Answer

OUTPUT

Question 8

Which statement about MQTT is TRUE?

Accepted Answer

It is suitable for low power devices

Question 9

In Blynk IoT platform, what is a “template ID” used for?

Accepted Answer

It links your project to specific project on Blynk cloud

Question 10

In Blynk, what does a virtual pin (like V0) represent?

Accepted Answer

Using Wi-Fi

Question 11

Which of the following best describes an embedded system?

Accepted Answer

A dedicated system designed to perform specific tasks

Question 12

Which microcontroller pin mode is required to read data from a digital sensor like DHT11?

Accepted Answer

INPUT

Question 13

Which protocol is more suitable for real-time IoT communication?

Accepted Answer

MQTT

Question 14

What does the function WiFi.status() return when ESP32 is successfully connected?

Accepted Answer

WL_CONNECTED

Question 15

Which communication protocol uses separate lines for data (MOSI, MISO), clock, and chip select?

Accepted Answer

SPI

Questions 15