Java Quiz
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Core Java Quiz – Test Your Java Knowledge
Java is a popular and versatile programming language used for developing a wide range of applications, from web and mobile applications to desktop software and embedded systems. A strong understanding of core Java concepts is essential for any Java developer. Test your knowledge with this Core Java Quiz, consisting of 10 multiple-choice questions.
Question Topics:
- String Comparison: This question evaluates your understanding of string comparisons in Java, specifically using the
==
operator. - Data Types: Java offers various data types for storing different kinds of values. This question assesses your knowledge of Java data types.
- Final Keyword: The
final
keyword has multiple uses in Java. This question checks your grasp of its purposes. - Synchronized Collections: Java provides synchronized collections for thread-safe operations. Identify the synchronized collection class in this question.
- Default Values: Java assigns default values to variables if they are not explicitly initialized. Understand what these default values are.
- Loop Control: Learn about the
break
statement in loops and how it affects program flow. - Constants: Constants are vital in Java programming. Identify the keyword used to declare constants.
- Object Class: All classes in Java inherit from a common parent class. This question evaluates your knowledge of this base class.
- Exception Handling: Java uses exceptions to handle errors gracefully. Understand which exception is thrown when accessing an array out of bounds.
- ArrayList vs. LinkedList: Java offers different data structures for various use cases. Differentiate between
ArrayList
andLinkedList
in terms of performance and usage.
This Core Java Quiz is a great way to assess your Java programming skills and identify areas for improvement. Whether you’re a beginner or an experienced Java developer, challenging yourself with these questions can help reinforce your Java knowledge. Good luck!
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- Question 1 of 10
1. Question
What is the output of the following code snippet?
String str1 = “Hello”;
String str2 = “Hello”;
System.out.println(str1 == str2);CorrectIncorrect - Question 2 of 10
2. Question
Which of the following is not a valid data type in Java?
CorrectIncorrect - Question 3 of 10
3. Question
What is the purpose of the final keyword in Java?
CorrectIncorrect - Question 4 of 10
4. Question
Which collection class is synchronized in Java?
CorrectIncorrect - Question 5 of 10
5. Question
What is the default value of a class variable (static field) that is not explicitly initialized?
CorrectIncorrect - Question 6 of 10
6. Question
In Java, what is the purpose of the break statement in a loop?
CorrectIncorrect - Question 7 of 10
7. Question
Which keyword is used to define a constant in Java?
CorrectIncorrect - Question 8 of 10
8. Question
What is the parent class of all classes in Java?
CorrectIncorrect - Question 9 of 10
9. Question
Which exception is thrown when an array is accessed with an index that is out of its bounds?
CorrectIncorrect - Question 10 of 10
10. Question
What is the difference between ArrayList and LinkedList in Java?
CorrectIncorrect