IOT102 SP26 B5 FE

Question 1 (Choose 1 answer)

Which of the following loop() functions is the most correct to display "Distance is: 1cm" on the LCD screen as shown in the image below?

A. void loop() { cm = readUltrasonicDistance(triggerPin, echoPin)/2/29.1; lcd.setCursor(0, 0); lcd.print("The distance is "); delay(400); lcd.clear(); }

B. void loop() { cm = readUltrasonicDistance(triggerPin, echoPin)/2/29.1; lcd.setCursor(0, 0); lcd.print("The distance is "); lcd.setCursor(0, 1); lcd.print(cm); lcd.print("cm"); delay(400); lcd.clear(); }

C. void loop() { cm = readUltrasonicDistance(triggerPin, echoPin)/2/29.1; lcd.setCursor(0, 0); lcd.print("The distance is "); lcd.setCursor(0, 1); lcd.print("cm"); delay(400); lcd.clear(); }

D. void loop() { lcd.setCursor(0, 0); lcd.print("The distance is "); lcd.setCursor(0, 1); lcd.print(cm); lcd.print("cm"); delay(400); lcd.clear(); }

Question 2 (Choose 1 answer)

What is Arduino?

A. Programming language

B. Open-source electronics platform

C. Image editing software

D. Text editor

E. None of the others

Question 3 (Choose 1 answer)

Which operation is appropriate when system calls notify the OS that the file is coming and set some of its attributes?

A. Delete

B. Create

C. Read

D. Write

Question 4 (Choose 1 answer)

For a voltage divider circuit with $R1=10k$ Ohm and $R2=15k$ Ohm. If $Vin=12V$ and $Vout$ is the voltage between two ends of $R1$, what is the value of $Vout$?

A. 4.8V

B. 4V

C. 8V

D. 7.2V

Question 5 (Choose 1 answer)

What is the purpose of the delay function in the sensor reading loop?

A. To set the sensor range

B. To avoid serial monitor overload

C. To control the brightness of LED

D. To initialize the pins

Question 6 (Choose two answers)

Which device commonly uses binary states to store information?

A. Resistor

B. Transistor

C. Capacitor

D. Inductor

Question 7 (Choose 1 answer)

What is the recommended input voltage for an Arduino Uno?

A. 5-10 V

B. 7-12 V

C. 9-15 V

D. 11-16 V

Question 8 (Choose 1 answer)

When designing an LED output circuit with an Arduino, what is the standard professional practice to ensure both the LED and the microcontroller are protected?

A. Connect the LED Anode directly to a Digital I/O pin and Cathode to GND

B. Connect the LED Anode to the TX pin and Cathode to the RX pin to monitor data

C. Connect the LED Anode to 5V and Cathode to any Analog Input pin without a resistor

D. Connect the LED Anode to a Digital I/O pin and Cathode to GND via a current-limiting resistor

Question 9 (Choose 1 answer)

What is the default I2C clock speed on the Arduino Uno?

A. 100 kHz

B. 400 kHz

C. 16 MHz

D. 10 kHz

Question 10 (Choose 1 answer)

What feature of IPv6 makes it particularly suitable for IoT?

A. It provides many more IP addresses.

B. It has better encryption.

C. It uses less power

D. It is easier to remember

Question 11 (Choose 1 answer)

Which category of actuators includes mechanisms that utilize air pressure to control or move objects?

A. Electrical

B. Mechanical

C. Hydraulic

D. Pneumatic

Question 12 (Choose 1 answer)

What is a Mock-up?

A. It is a horizontal prototype.

B. It is a particular approach to throwaway prototype.

C. It is a throwaway prototype.

D. It is a nonreleasable prototype.

Question 13 (Choose 1 answer)

Which communication protocol does the RC522 RFID module use?

A. I2C

B. UART

C. SPI

D. PWM

Question 14 (Choose 1 answer)

How many wires are used for communication in the I2C protocol?

A. 2

B. 3

C. 8

D. 5

Question 15 (Choose 1 answer)

What is the maximum input voltage limit for the Arduino Uno?

A. 6-20V

B. 7-15V

C. 9-15V

D. 5-12V

Question 16 (Choose 1 answer)

How does the veracity of big data impact IoT applications?

A. By increasing the data transmission range

B. By improving the energy efficiency of devices

C. By ensuring the reliability and accuracy of the data used for decision-making

D. By decreasing the cost of data storage

Question 17 (Choose 1 answer)

Which of the following is an example of a fog computing concept in IoT?

A. Storing data on remote servers

B. Routing data through multiple gateways

C. Performing data analytics on edge devices

D. Using blockchain technology for secure transactions

Question 18 (Choose 1 answer)

According to Ohm's Law, what is the relationship between electric current (I), voltage (V), and resistance (R)?

A. Current is inversely proportional to voltage and directly proportional to resistance

B. Current is directly proportional to voltage and resistance

C. Current is directly proportional to voltage and inversely proportional to resistance

D. Current is not related to voltage or resistance, but to other factors

Question 19 (Choose 1 answer)

In a common cathode seven-segment display, what is common among all segments?

A. All segments are connected to VCC

B. All segments are connected to GND

C. All segments have individual resistors

D. All segments are controlled by separate pins

Question 20 (Choose 1 answer)

What technology is primarily used for short-range, contactless data exchange in payment systems?

A. Bluetooth

B. NFC (Near Field Communication)

C. Wi-Fi

D. LoRa

Question 21 (Choose 1 answer)

Which of the following statements about the MQ-3 sensor is NOT TRUE?

A. It has a preheat time requirement

B. It responds instantly after power-on

C. It needs warm-up for stable readings

D. Temperature affects its sensitivity

Question 22 (Choose 1 answer)

Is the Arduino code an Object-Oriented programming language or a Procedural programming language?

A. The Arduino Code follows the Top-Down Procedural ideology

B. The Arduino Code follows a custom Procedural Ideology

C. The Arduino Code follows the Object-Oriented ideology

D. The Arduino Code follows the Bottom-Up Procedural ideology

Question 23 (Choose 1 answer)

What is the purpose of "Authentication" in a Secure IoT Framework?

A. To establish a trust relationship by validating the identity of an IoT device connecting to the network

B. To control all elements that route and transport endpoint traffic securely over the network

C. To determine what information an authenticated device can access and share.

D. To provide threat detection and threat mitigation for aggregated information

Question 24 (Choose 1 answer)

What is the process of identifying a trusted device in IoT network?

A. Auditing

B. Authorization

C. Authentication

D. Accounting

Question 25 (Choose 1 answer)

Which part of the ATmega328p is responsible for executing instructions?

A. Flash memory

B. ALU

C. EEPROM

D. UART

Question 26 (Choose 1 answer)

Which of the following is a common communication protocol used to interface a 16x2 LCD with a microcontroller?

A. UART

B. PWM

C. SPI

D. I2C

Question 27 (Choose 1 answer)

Which of the following is an example of an IoT device?

A. Smart thermostat

B. Calculator

C. Mechanical typewriter

D. Standard light bulb

Question 28 (Choose 1 answer)

When using software serial, how many ports can receive data at a time?

A. Multiple ports can receive data simultaneously.

B. Only one port can receive data at a time.

C. All ports can send and receive data simultaneously.

D. No ports can receive data, only send.

Question 29 (Choose 1 answer)

What does the statement delay(1000); do in Arduino C?

A. Repeat the program 1000 times

B. Pause the program for 1000 microseconds

C. Pause the program for 1 second

D. Send data after 1 second

Question 30 (Choose 1 answer)

What type of communication does the RX and TX pins on the Arduino Uno facilitate?

A. Power transfer

B. Wireless communication

C. Serial communication

D. Analog signal processing

Question 31 (Choose 1 answer)

What programming strategies could be employed to handle the "velocity" aspect of big data in an IoT system?

A. Implementing strict data type casting in all functions

B. Utilizing just-in-time compilation for all code

C. Employing data streaming and real-time processing frameworks

D. Using older data protocols to ensure compatibility

Question 32 (Choose 1 answer)

Which component is used to store electrical energy?

A. Resistor

B. Capacitor

C. Diode

D. Transformer

Question 33 (Choose 1 answer)

What is the maximum humidity measurement range of the DHT11 sensor?

A. 20% to 90%

B. 20% to 80%

C. 0% to 100%

D. 40% to 60%

Question 34 (Choose 1 answer)

Which layer of IoT architecture directly interacts with physical sensors and actuators?

A. Perception layer

B. Application layer

C. Network layer

D. Security layer

Question 35 (Choose 1 answer)

Which function in the Arduino is used to initialize the serial communication?

A. Serial.println()

B. Serial.available()

C. Serial.read()

D. Serial.begin()

Question 36 (Choose 1 answer)

In the given Arduino code, what is the purpose of the "analogWrite" function, and how is it used to control the LED's behavior?

A. The "analogWrite" function is used to read analog values from a sensor.

B. The "analogWrite" function is used to blink the LED on and off

C. The "analogWrite" function is used to control the brightness of the LED

D. The "analogWrite" function is used to read digital values from a sensor

Question 37 (Choose 1 answer)

Which Arduino board is most suitable for large projects requiring a significant number of I/O pins?

A. Arduino Nano

B. Arduino Uno

C. Arduino Mega

D. Arduino Mini

Question 38 (Choose 1 answer)

What value range is used with the analogWrite() function for PWM control?

A. 0 to 1023

B. 0 to 5

C. 0 to 255

D. -255 to 255

Question 39 (Choose 1 answer)

Which factor is NOT essential for a successful IoT project?

A. Addressing a real-world problem

B. Providing a unique benefit

C. Targeting a specific audience

D. Using the most expensive technology available

Question 40 (Choose 1 answer)

What type of light does the TCS34725 measure in addition to RGB?

A. Infrared filtered channel

B. Clear light

C. Narrowband blue light

D. Polarized light

Question 41 (Choose 1 answer)

Which of the following is an example of a device that could be connected to the internet in the future?

A. A washing machine

B. A toaster

C. A refrigerator

D. All of the above

Question 42 (Choose 1 answer)

What are the characteristics of an 8x8 LED Matrix in an IoT system?

A. It has 16 LEDs

B. It can display only numerical characters

C. It consists of 64 LEDs arranged in an 8x8 grid

D. It requires a separate power source for each LED

Question 43 (Choose 1 answer)

Which communication protocol does the MAX30102 use?

A. SPI with open-drain outputs

B. Inter-Integrated Circuit

C. UART with parity bit

D. SWD debug interface

Question 44 (Choose 1 answer)

What type of signal is generated by PWM on the Arduino Uno?

A. Pure sine wave

B. Square wave with variable duty cycle

C. Continuous DC voltage

D. Square wave with variable frequency

Question 45 (Choose 1 answer)

How many times does the loop() function run on every startup of the Arduino System?

A. 1

B. Depends upon the setup() function

C. Infinitely till the power is supplied to the Arduino

D. 3

Question 46 (Choose 1 answer)

What is the full form of IDE in Arduino IDE software?

A. Intra Defense Environment

B. Intra Development Environment

C. Integrated Development Environment

D. Integrated Deployed Environment

Question 47 (Choose 1 answer)

What is a critical consideration when programming analog input/output for IoT applications?

A. The color depth of the display

B. The refresh rate of the display

C. The precision of the sensor data

D. The size of the code

Question 48 (Choose 1 answer)

What is the primary purpose of PWM signals in IoT development boards?

A. They are used by sensors to have analog input

B. They are used by sensors to have digital input

C. They are used by actuators to have analog input

D. They are used by actuators to have digital input

Question 49 (Choose 1 answer)

How many bits are in an IPv6 address?

A. 8

B. 32

C. 64

D. 128

Question 50 (Choose 1 answer)

In a thin client setup, where is most of the software and data processing performed?

A. Locally on the thin client device

B. On a central server or cloud infrastructure.

C. On a central server or client infrastructure

D. On a dedicated network switch

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