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