ESP32 Quiz by azka.xdlabin QuizMarch 3, 2025 ESP32 Quiz 1 / 60 What is the default operating voltage of the ESP32-WROOM-32 module? 12V 3.3V 1.8V 5V 2 / 60 Which pins on the ESP32 can be used for touch sensing? Touch-capable GPIOs (e.g., T0 to T9) GPIO 0 to 10 GPIO 32 to 39 Only GPIO 13 3 / 60 Which IDE is most commonly used by beginners for ESP32 development? Code::Blocks VS Code Arduino IDE Eclipse 4 / 60 How do you get the IP address of ESP32 after connecting to Wi-Fi? WiFi.localIP() WiFi.IP() WiFi.myIP() WiFi.getIP() 5 / 60 What does BLE stand for? Bluetooth Light Edition Bluetooth Long-range Extension Bluetooth Low Energy Basic Low Energy 6 / 60 What is the maximum voltage ESP32 GPIO pins can tolerate? 1.8V 12V 5V 3.3V 7 / 60 What keyword is used to define a constant pin number? define const int static pinDef 8 / 60 Which library is commonly used for Classic Bluetooth in Arduino IDE? BluetoothClassic.h BLEDevice.h BluetoothSerial.h WiFiSerial.h 9 / 60 What function is used to set the mode of a GPIO pin in ESP32? setPinMode() definePin() pinMode() gpioMode() 10 / 60 Which platform is used to manage ESP32 code with a modern interface and multiple boards? PlatformIO Notepad++ Tinkercad GitHub 11 / 60 What is the purpose of the "Boot" button on ESP32 boards? It enters firmware upload mode It resets Wi-Fi settings It opens a menu It opens the serial monitor 12 / 60 What peripheral is used to convert analog input to digital values? PWM DAC SPI ADC 13 / 60 What types of Bluetooth are supported by ESP32? None BLE only Classic only Both Classic and BLE 14 / 60 Which function is used to generate PWM signals on a GPIO pin in Arduino? setPWM() pwmOut() analogWrite() digitalPWM() 15 / 60 What function is used to connect ESP32 to a Wi-Fi network? WiFi.begin() WiFi.attach() WiFi.connect() WiFi.link() 16 / 60 What is the maximum clock speed of the ESP32-WROOM-32? 80 MHz 120 MHz 160 MHz 240 MHz 17 / 60 On Windows, where can you check if the CP2102 driver is installed correctly? Device Manager File Explorer Registry Editor Task Manager 18 / 60 What is the resolution of the ADC in ESP32 by default? 8-bit 10-bit 16-bit 12-bit 19 / 60 What is the function to create a Wi-Fi access point? WiFi.softAP() WiFi.apStart() WiFi.startAP() WiFi.apBegin() 20 / 60 Which USB driver is usually required for ESP32 on Windows? CH340 or CP210x USB to UART driver Arduino AVR driver GPIO bridge driver FTDI FT232R 21 / 60 If the ESP32 board is not detected on Linux, which command can help check connected USB devices? lsusb Both A and C usbconfig dmesg | grep serial 22 / 60 Which of the following can ESP32 act as? Neither A nor B Wi-Fi Access Point Both A and B Wi-Fi Station 23 / 60 How many GPIO pins are typically available on the ESP32 DevKit board? 10 20 34 54 24 / 60 How many ADC channels are available on the ESP32? 10 to 18(depends on chip variant) 32 2 3 25 / 60 What function is used to disconnect from Wi-Fi in ESP32? WiFi.disconnect() WiFi.shutdown() WiFi.stop() WiFi.end() 26 / 60 Which app is commonly used to test BLE communication on a smartphone? nRF Connect Arduino Bluetooth Serial Monitor ESP BLE Controller 27 / 60 What is the correct baud rate commonly used for ESP32 serial communication? 4800 115200 250000 9600 28 / 60 Which communication interfaces does ESP32-WROOM-32 support? SPI, RS485, Ethernet USB, RS232, VGA UART, HDMI, PCIe UART, SPI, I2C 29 / 60 Which function checks if ESP32 is connected to Wi-Fi? WiFi.signal() WiFi.status() WiFi.connected() WiFi.check() 30 / 60 Which command reads the value of a digital input pin? readInput() getPinValue() inputRead() digitalRead() 31 / 60 What is the purpose of a DAC in ESP32? Data access control Digital signal amplification Reset pin values Convert digital to analog signals 32 / 60 What is the typical range of BLE communication for ESP32? 5–10 meters 10–30 meters 500 meters 100–200 meters 33 / 60 What is the purpose of setup() in ESP32 Arduino code? Delays execution Initializes code and runs once Runs the main loop repeatedly Sets up the display 34 / 60 What is the function of the CP2102 chip in ESP32 development boards? It manages Wi-Fi connectivity It controls GPIO pins It provides USB-to-Serial communication It converts 5V to 3.3V 35 / 60 What tool is used for professional development with ESP32 (official SDK)? PlatformIO Core Arduino Core ESP-IDF ESP-Terminal 36 / 60 What data type is commonly used to store HIGH or LOW? boolean bool byte int 37 / 60 Which function initializes the serial communication? Serial.begin() Serial.read() Serial.init() Serial.start() 38 / 60 How do you print text to the Serial Monitor in ESP32 Arduino code? console.log("text") Serial.println("text") monitor.write("text") print("text") 39 / 60 Which file is used to configure board settings in Arduino IDE for ESP32? board_config.json platform.ini setup.ini boards.txt 40 / 60 How can you install ESP32 board support in Arduino IDE? By downloading an EXE installer Through Tools > Manage Libraries It is built-in automatically Using the Board Manager URL 41 / 60 What must be installed in Arduino IDE to program the ESP32? Bluetooth driver Java SDK Python interpreter ESP32 Board Support Package 42 / 60 What is the role of a "BLE Server" on ESP32? It advertises services and sends data to clients It connects to other devices and receives data It stores data in flash It connects to Wi-Fi networks 43 / 60 What problem can occur if the CP2102 driver is not installed on a computer? The ESP32 will not be recognized by the computer The ESP32 will overheat The Wi-Fi module will not work ESP32 will not power on 44 / 60 Which function turns an output pin HIGH or LOW in Arduino-style code for ESP32? pinOutput() digitalWrite() setPin() writePin() 45 / 60 Which driver is required for the CP2102 chip on Windows systems? CP210x USB to UART Bridge VCP Driver FTDI Driver Arduino USB Driver CH340 Driver 46 / 60 What is the purpose of delay(1000); in ESP32 Arduino code? Waits for user input Waits for 1000 milliseconds Reads pin 1000 Turns off power for 1000 ms 47 / 60 What UUIDs are used for in BLE communication? Define services and characteristics Identify devices on Wi-Fi Create random values Set device frequency 48 / 60 Which pins should be avoided during boot because they affect the boot process? GPIO 2, 4, 5 GPIO 21, 22 GPIO 6 to GPIO 11 GPIO 18, 19 49 / 60 Which library is used in Arduino IDE to connect ESP32 to Wi-Fi? WiFi.h ESP32WiFi.h Ethernet.h WiFiClient.h 50 / 60 Which company manufactures the ESP32 chip? Intel Microchip Atmel Espressif Systems 51 / 60 What does the loop() function do? Repeats code continuously Declares variables Uploads code Executes only once 52 / 60 Which ESP32 function sets the duty cycle for PWM output? analogWrite(pin, value) digitalWrite(pin, HIGH) setDutyCycle(pin, value) pwmSet(pin, value) 53 / 60 What constant indicates a successful connection in WiFi.status()? CONNECTED ONLINE OK WL_CONNECTED 54 / 60 What is the core processor used in ESP32-WROOM-32? ARM Cortex-M3 AVR RISC-V Xtensa LX6 55 / 60 What is the typical range of Wi-Fi for ESP32 in open space? 50–100 meters 10–20 meters 1 km 200–300 meters 56 / 60 In BLE, what is the purpose of a "Characteristic"? Used to identify the device Stores Wi-Fi credentials Transfers data between server and client Assigns power levels 57 / 60 Which library is used to implement BLE on ESP32? ESPBLE.h BLESerial.h BLEDevice.h BluetoothLowEnergy.h 58 / 60 What is the maximum number of BLE connections ESP32 can typically support as a server? 3 4 7 1 59 / 60 What is the default Wi-Fi mode of ESP32 when it powers up? OFF AP mode STA mode AP+STA mode 60 / 60 Which company manufactures the ESP32-WROOM-32 module? Espressif Systems Microchip Atmel Texas Instruments Your score isThe average score is 63% 0% Restart quiz
