Java is one of the most popular and widely used programming languages in the world.
It is an object-oriented, platform-independent, and versatile language that can be used for various applications such as web development, mobile development, desktop development, and more.
If you are a beginner or an intermediate learner of Java, you might want to test your knowledge and skills by solving some multiple-choice questions (MCQs) on Java. MCQs are a great way to assess your understanding of the concepts and syntax of Java, as well as to prepare for exams or interviews.
In this blog post, we will provide you with 30 MCQs on Java (Part-1) that cover some of the basic and important topics of Java such as variables, data types, operators, control statements, methods, classes, objects, inheritance, polymorphism, and more.
Each question will have four options to choose from, and only one option will be correct. You will also see a green check mark for the correct answer and a red cross mark for the wrong answer.
Also, check MCQ on Java (Part-2)
MCQ on Java (Part-1)
Question 1: What is Java?
Question 2: Which of the following is not a Java keyword?
Question 3: What is the output of the following Java code snippet?
System.out.println(10 % 3);
Question 4: Which Java keyword is used to create a subclass?
Question 5: Which of the following is an example of a Java wrapper class for the primitive type 'int'?
Question 6: What is the purpose of the `break` statement in Java?
Question 7: What is the difference between `ArrayList` and `LinkedList` in Java?
Question 8: Which access modifier allows a class to be accessed only within the same package?
Question 9: Which Java keyword is used to create an instance of a class?
Question 10: What is the purpose of the `super` keyword in Java?
Question 11: What is the output of the following code snippet?
int x = 5;
System.out.println(x++);Question 12: Which of the following is NOT a valid Java identifier?
Question 13: Which Java keyword is used to handle exceptions?
Question 14: Which data structure uses the LIFO (Last-In-First-Out) principle?
Question 15: What is the default value of an uninitialized `int` variable in Java?
Question 16: What is the output of the following code snippet?
String str1 = "Hello";
String str2 = "Hello";
System.out.println(str1 == str2);Question 17: Which keyword is used to define a constant in Java?
Question 18: What does the `break` statement do?
Question 19: Which access modifier provides the highest level of visibility in Java?
Question 20: Which of the following is true about constructor overloading?
Question 21: What is the output of the following code snippet?
int x = 5;
System.out.println(x++ + ++x);Question 22: Which of the following is not a valid Java identifier?
Question 23: Which of the following statements is true about Java exceptions?
Question 24: Which data structure follows the Last-In-First-Out (LIFO) principle?
Question 25: What is the default value of an uninitialized boolean variable in Java?
Question 26: Which of the following is NOT a primitive data type in Java?
Question 27: What is the correct way to declare and instantiate an array of integers in Java?
Question 28: What is the output of the following code snippet?
String str1 = "Hello";
String str2 = new String("Hello");
System.out.println(str1 == str2);Question 29: What is the purpose of the "finally" block in a try-catch-finally statement?
Question 30: Which keyword is used to prevent a variable from being modified in Java?
The Bottom Line
We hope you enjoyed solving these 30 MCQs on Java (Part-1) and learned something new or refreshed your memory.
These questions are designed to help you improve your Java knowledge and skills, as well as to prepare for exams or interviews.
You can also comment below if you have any doubts or feedback about these questions.
In the next blog post, we will provide you with another set of 30 MCQs on Java (Part-2) that will cover some more advanced topics of Java such as exceptions, collections, threads, I/O streams, networking, JDBC, servlets, JSPs, and more. Stay tuned for that and keep practicing!
Abdur Rohman is an Electrical Engineer from Charaideo, Assam, who wears multiple hats as a part-time teacher, blogger, entrepreneur, and digital marketer. Passionate about education, he founded The Assam School blog to provide free, comprehensive textbook solutions, MCQs (Multiple Choice Questions), and other academic content for students from Class V to XII.