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