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FebTop 50 Java MCQ Questions – Master Java for Interviews & Exams
30 Jan 2026
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Java MCQs are a good way to practice and become a master in Java programming. Java is a high-level object-oriented programming language. It is easy to understand and used to develop programs. For the preparation of the Java interview or exam, Java developers and students should go through the multiple-choice questions and answers of Java once in a lifetime.
So, in this Java tutorial , I brought some multiple-choice questions and answers on Java programming language only for you. It will help you to prepare well for your exams or interviews. So let's explore the top 50 Java MCQ questions and answers. Only 5% of Java beginners unlock high-paying roles without proper guidance. Don’t miss out—Enroll now in our Free Java Course to kickstart your career with expert-led training.
Java MCQ Quiz (50 Questions)
1. Which of these is not a feature of Java?
2. Which component runs compiled Java bytecode?
3. Purpose of PATH environment variable in Java setup?
4. Feature that allows Java programs to run on different platforms?
5. Standard naming convention for Java class names?
6. Correct syntax for multi-line comment in Java?
7. What does multithreading mean in Java?
8. Default value of a boolean instance variable in Java?
9. Result of (int)(7.9) in Java?
10. Keyword used to create constants in Java?
11. Range of short data type in Java?
12. What will be the output of the following code snippet? int a = 10; int b = 20; System.out.println(a + b);
13. Output of: boolean fun = true; System.out.println(!fun);
14. Which statement is correct about Java?
15. Pseudocode: SET x=10; IF x>5 PRINT 'Greater' ELSE 'Lesser'
16. Pseudocode: SET a=3, b=4; PRINT a*b
17. Pseudocode: SET n=4; IF n MOD 2 = 0 PRINT 'Even' ELSE 'Odd'
18. Error in: int[] a = new int[2]; a[0]=1; a[1]=2; a[2]=3;
19. What prints? int i=0; while(i<5){i++;} System.out.println(i);
20. Control structure for repeating code multiple times?
21. Output: if(false) println('True'); else println('False');
22. Role of break in switch statement?
23. Main difference between while and do-while?
24. Keyword to exit loop early in Java?
25. Output of: for(int i=0; i<4; i++) println(i);
26. What is the output of this code? int x = 1; while(x < 4) { System.out.println(x); x++; }
27. What will this pseudocode output? SET count = 5 DO PRINT count COUNTDOWN count
28. Analyze this pseudocode. SET num = 0 WHILE num <= 5 IF num MOD 2 = 0 THEN PRINT num END IF INCREMENT num
29. Identify the error. for(int i=0; i<=5; i++) { System.out.println(i); } System.out.println(i);
30. Spot the mistake. int counter = 0; while(counter < 5) { counter++; } System.out.println('Count: ' + counter);
31. Find the error in this code. int num = 1; do{ System.out.println(num); num++; } while(num <= 3); System.out.println(num);
32. Which class is commonly used for simple keyboard input in Java?
33. In Java, what is the default value of an array of integers?
34. What does 'BufferedReader' in Java provide that 'Scanner' does not?
35. How do you access the third element in an array named 'arr'?
36. What happens when you try to access arr[3] in an array of size 3?
37. What is the purpose of the 'length' attribute in a Java array?
38. Which of these is not a valid way to instantiate an array in Java?
39. In a multi-dimensional array, how do you access the element in the second row and third column of an array named 'matrix'?
40. What will the following code output? int[] arr = {1, 2, 3}; for(int num : arr) { System.out.println(num); }
41. What does this Java code do? int[][] arr = {{1, 2}, {3, 4}}; for(int i = 0; i < arr.length; i++) { for(int j = 0; j < arr[i].length; j++) { System.out.print(arr[i][j] + ' '); } System.out.println(); }
42. What will be the result of executing this code snippet? String[] names = {'Java', 'Python', 'C++'}; System.out.println(names[1].length());
43. Analyze this code. int[] nums = new int[3]; nums[1] = 10; int x = nums[1] + nums[0]; System.out.println(x);
44. What will this pseudocode output? SET arr = [1, 2, 3] FOR EACH num IN arr PRINT num
45. Determine the output of this pseudocode. SET arr = [10, 20, 30] SET sum = 0 FOR i = 0 TO LENGTH(arr) - 1 INCREMENT sum BY arr[i] PRINT sum
46. What will be the result of this pseudocode? SET matrix = [[1, 2], [3, 4]] PRINT matrix[0][1]
47. Identify the issue in this code snippet. int[] numbers = new int[5]; for(int i = 0; i <= numbers.length; i++) { System.out.println(numbers[i]); }
48. Spot the mistake in this code. String[] names = {'Java', 'Python', 'C'}; for(int i = 0; i < names.length; i++) { System.out.println(names[i].length()); }
49. Find the error in this Java code. int[][] matrix = new int[2][2]; matrix[0][0] = 1; matrix[0][1] = 2; matrix[1][0] = 3; System.out.println(matrix[1][1]);
50. Identify the flaw in this Java code. char[] chars = new char[-1];
51. Which is NOT a valid access modifier in Java?
52. What does StringBuilder do better than String for concatenation?
Your Score: / 50
Conclusion
Java Multiple Choice Questions (MCQs) and answers are an important resource for testing Java programming expertise. We covered various Java concepts, including multithreading and memory management which will help you in interviews and exams.
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FAQs
James Gosling is considered the father of Java.
JAVA stands for Just Another Virtual Accelerator.
It functions as a virtual machine, translating Java bytecode into machine language.
We should focus on various concepts such as Basic Syntax and Data Types, Operators Control Structures (if-else, switch, loops), Arrays and Strings, Object-Oriented Programming (OOP), Exception Handling, Collections Framework, Java Memory Management, Java I/O and NIO
To effectively prepare for Java MCQ questions:
- Review Core Concepts: Focus on key topics such as OOP, collections, exceptions, multithreading, and Java 8+ features.
- Practice Coding: Solve coding problems on platforms like LeetCode or HackerRank to reinforce your understanding.
- Use Online Resources: Take advantage of Java quizzes and MCQ practice tests available online.
- Study Past Papers: Go through previous interview questions to identify common patterns.
- Read Documentation: Familiarize yourself with Java documentation for detailed explanations and examples.
- Join Study Groups: Engage with peers to discuss concepts and solve problems together.
- Utilize Flashcards: Create flashcards for quick revision of important concepts and syntax.
By combining these strategies, you'll build a strong foundation and improve your confidence in tackling Java MCQs.
Overlooking Details, Confusing Similar Concepts, Neglecting Syntax, Skipping Basics, Not Practicing Enough, Ignoring Time Management , Relying on Memory
To stand out in a Java interview, consider developing additional skills such as ,Advanced Java Features Spring Framework, Hibernate, Microservices, Design Patterns, Testing, integration testing, test-driven development (TDD), DevOps Tools, and also soft skills
Take our Java skill challenge to evaluate yourself!
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