MCQ on Java (Part-2) – Boost Your Java Knowledge With These 30 MCQs 

Question 1: What is the result of the following code snippet?

int x = 5;
int y = x++ + ++x;
System.out.println(y);

Question 2: What is the output of the following code snippet?

int[] numbers = {1, 2, 3, 4, 5};
int sum = 0;
for (int i = 0; i < numbers.length; i++) {
    sum += numbers[i];
}
System.out.println(sum);

Question 3: Which of the following is the correct way to declare a constant variable in Java?

Question 4: Which data structure follows the "first-in, first-out" (FIFO) principle?

Question 5: What is the default value of an uninitialized boolean variable in Java?

Question 6: Which keyword is used to create an object of a class in Java?

Question 7: What is the purpose of the "break" statement in a loop?

Question 8: What does the "static" keyword mean for a variable in Java?

Question 9: Which of the following is NOT a valid access modifier in Java?

Question 10: Which Java keyword is used to handle exceptions?

Question 11: What is the output of the following code snippet?

        int x = 5;
        int y = 2;
        int result = x / y;
        System.out.println(result);
    

Question 12: Which of the following is NOT a valid type of loop in Java?

Question 13: What does the "this" keyword refer to in Java?

Question 14: Which of the following is NOT a valid method signature in Java?

Question 15: Which of the following statements about interfaces in Java is true?

Question 16: Which of the following is NOT a primitive data type in Java?

Question 17: What is the result of the following code snippet?

        String str1 = "Hello";
        String str2 = "World";
        String result = str1 + str2;
        System.out.println(result);
    

Question 18: Which keyword is used to define a subclass in Java?

Question 19: What is the purpose of the "break" statement in a switch statement?

Question 20: Which of the following statements about constructor overloading in Java is true?

Question 21: What is the output of the following code snippet?

        int x = 5;
        System.out.println(x++);
        System.out.println(++x);
    

Question 22: What is the access modifier used for a class member that can be accessed within the same class and its subclasses, but not from outside?

Question 23: Which of the following statements about abstract classes in Java is true?

Question 24: What does the "final" keyword in Java indicate?

Question 25: Which of the following is NOT a valid way to create an instance of a class in Java?

Question 26: Which keyword is used to create an object in Java?

Question 27: What is the purpose of the "super" keyword in Java?

Question 28: Which of the following statements about interfaces in Java is true?

Question 29: What does the "this" keyword refer to in Java?

Question 30: What is the purpose of the "static" keyword in Java?