Arduino Uno - Microcontroller Components and Interfaces

What is the primary function of a microcontroller?

• To act as a small computer that can be programmed

• To serve as a power supply

• To store large amounts of data

• To provide internet connectivity

What is the operating frequency of the Arduino UNO?

• 32 MHz

• 16 MHz

• 64 MHz

• 8 MHz

Which component is used to stabilize the DC voltages in the Arduino board?

• Crystal Oscillator

• Voltage Regulator

• Analog Pins

• Power LED Indicator

How many digital I/O pins does the Arduino UNO have?

• 16

• 14

• 13

• 10

What is the purpose of the AREF (Analog Reference) pin on the Arduino UNO?

• To supply power to the board

• To reset the microcontroller

• To set the reference voltage for analog input

• To transmit data

Which pin is used to reset the Arduino UNO?

• TX pin

• GND pin

• RX pin

• RESET pin

What does the USB port on the Arduino board primarily provide?

• Analog signal input

• Programming interface for the microcontroller

• Digital output for LEDs

• Digital input for LEDs

What is the function of the TX and RX LEDs on the Arduino UNO?

• To indicate power status

• To provide analog input

• To show data TRANSMISSION and RECEIVER

• To reset the board

How many analog input pins does the Arduino UNO have?

• 8

• 3

• 5

• 6

What does the Power LED indicator signify?

• The board is in programming mode

• The microcontroller is powered up

• The board is connected to the internet

• The analog pins are active