86. Watchdog Operation

Consider the following Arduino UNO code that uses the Watchdog Timer. What will be printed on the Serial Monitor?

#include <avr/wdt.h>
#include <avr/interrupt.h>

void setup() {
  Serial.begin(115200);
  delay(1000);

  wdt_enable(WDTO_1S); 		// Enable watchdog timer with 1-second timeout
  Serial.println("Watchdog Timer Initialized");

  wdt_reset();		 // Reset watchdog timer
  sei(); 			// Enable global interrupts

  Serial.println("System Setup Complete");
}

ISR(WDT_vect) {
  Serial.println("Watchdog Interrupt Triggered");
}

void loop() {
  Serial.println("Loop execution started");
  delay(1200);  	
  Serial.println("Loop execution completed");
  wdt_reset(); 		// Reset watchdog timer
}