Explore topic-wise MCQs in Arduino.

This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Arduino knowledge and support exam preparation. Choose a topic below to get started.

1.

What are the functions of the SDA and SCL pins of the Arduino UNO?

A. They facilitate I2C communications
B. They facilitate SPI Communications
C. They facilitate USB Communications
D. They facilitate Ethernet Communications
Answer» B. They facilitate SPI Communications
Discussion
2.

In the diagram given below, there are two sets given. These sets represent pin clusters on a typical Arduino UNO. Which set do the Digital IO pins on the Arduino UNO belong to?

A. Set A
B. Set B
C. Set A and B
D. Neither Set A nor B
Answer» C. Set A and B
Discussion
3.

What is the function of the AREF pin in the Arduino UNO?

A. It is used as a reference voltage for all analog voltage calculations in the board
B. It is used as a reference voltage for all digital voltage calculations in the board
C. It is used as a reference voltage for the power source on the board
D. It is used as a reference voltage for the ground pins on the board
Answer» B. It is used as a reference voltage for all digital voltage calculations in the board
Discussion
4.

What is the function of the IOREF pin on the Arduino UNO?

A. To provide a constant 12V DC supply
B. To provide the voltage corresponding to the standard GPIO working voltage of the board
C. To take input voltage and set it as a reference for all GPIO operations
D. To provide ground
Answer» C. To take input voltage and set it as a reference for all GPIO operations
Discussion
5.

What is the full form of the I2C Protocol?

A. Inter-Integrated Circuit
B. Intra-Integrated Circuit
C. Integrated-Inter Circuit
D. Infinite-Integrated Circuit
Answer» B. Intra-Integrated Circuit
Discussion
6.

The pins SS, SCK, MOSI and MISO on the Arduino belong to the ___ bus.

A. I2C
B. SPI
C. GPIO
D. Ethernet
Answer» C. GPIO
Discussion
7.

What is the use for the 2 serial pins on the Arduino Diecimila?

A. To send and receive GPIO digital signals
B. To receive analog signals
C. To send PWM signals
D. To send and receive Serial TTL signals
Answer» E.
Discussion
8.

What does the analogRead() function do physically when invoked in a code?

A. It accepts a digital Input
B. Reads the raw voltage value
C. Activates the ADC Circuit to read voltage values
D. Activates the DAC Circuit to read voltage values
Answer» D. Activates the DAC Circuit to read voltage values
Discussion
9.

What is the use of the Vin pin present on some Arduino Boards?

A. To provide a 5V output
B. Is used for plugging in 3V supply
C. To power the Arduino Board
D. To ground the Arduino Board
Answer» D. To ground the Arduino Board
Discussion
10.

What is the use of the RESET button on the Arduino UNO?

A. To restart the code present in the Arduino
B. To restore a previous version of a code
C. To erase the code present in the Arduino
D. To erase the SRAM in Arduino Microcontroller
Answer» B. To restore a previous version of a code
Discussion