Java Programming - MCQ Practice Questions

Which of the following will compile and run without errors?

What is the result of: System.out.println('A' + 'B');?

Which method is called automatically when an object is garbage collected?

What will happen in this code: int x = Integer.MAX_VALUE; x++;?

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 be the output of the following code? String str1 = "Hello"; String str2 = new String("Hello"); System.out.println(str1 == str2);

Consider a scenario where you need to create a variable that can hold references to objects of any type. Which of the following approaches would be most appropriate in Java 2024 standards?

Which of the following correctly demonstrates method overloading in Java?

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

In the context of Java 2024-25 exam pattern, which statement about the enhanced 'var' keyword (local variable type inference) is INCORRECT?

Consider a real-world scenario where you need to implement a logging system. Which access modifier would you use for internal helper methods that should not be accessible outside the class?

What is the output of the following code snippet? int x = 10; int y = x++ + ++x; System.out.println(x + " " + y);

Which of the following statements about Java's String class is TRUE?

What will be the result of executing the following code? boolean result = (5 > 3) && ($\frac{10}{0}$ > 5); System.out.println(result);

In Java, what is the relationship between an interface and a class in terms of implementation?

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?