Java Programming - MCQ Practice Questions

Which of the following is a valid method name in Java?

Which keyword is used to create a constant variable in Java that cannot be modified after initialization?

What will be the result of: int a = 10; int b = 20; System.out.println(a + b + "Java");?

Consider the following code: int x = 5; x += 3; System.out.println(x); What is the output?

What is the size of 'long' data type in Java?

What is the output of: System.out.println($\frac{10}{3}$);?

Which of the following is true about the 'break' statement?

Which of the following is NOT a Java keyword?

What is the output of: System.out.println(5 > 3 ? "Yes" : "No");?

Consider the following code snippet. What is the primary purpose of the 'final' keyword when applied to a class in Java?

Which of the following statements about Java's garbage collection is TRUE?

What will happen when you execute the following code? int[] arr = new int[5]; System.out.println(arr[5]);

Consider the following code. What will be printed? String s = "Java"; s = s.concat(" Programming"); System.out.println(s.length());

Which of the following is a valid declaration of a two-dimensional array in Java that can store 3 rows and 4 columns of integers?

Which of the following is NOT a pillar of Object-Oriented Programming?

Which access modifier allows a member to be accessed only within the same package?

What will be the output? class Parent { void show() { System.out.println("Parent"); } } class Child extends Parent { void show() { System.out.println("Child"); } } parent obj = new Child(); obj.show();

What is the purpose of the 'super' keyword in Java?

Which interface in Java represents a collection that does not allow duplicate elements?

Which of the following correctly describes the 'this' keyword?