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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.
- String Comparison: This question evaluates your understanding of string comparisons in Java, specifically using the
- 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
finalkeyword 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
breakstatement 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
LinkedListin 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
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
Which of the following is not a valid data type in Java?CorrectIncorrect
- Question 3 of 10
What is the purpose of the final keyword in Java?CorrectIncorrect
- Question 4 of 10
Which collection class is synchronized in Java?CorrectIncorrect
- Question 5 of 10
What is the default value of a class variable (static field) that is not explicitly initialized?CorrectIncorrect
- Question 6 of 10
In Java, what is the purpose of the break statement in a loop?CorrectIncorrect
- Question 7 of 10
Which keyword is used to define a constant in Java?CorrectIncorrect
- Question 8 of 10
What is the parent class of all classes in Java?CorrectIncorrect
- Question 9 of 10
Which exception is thrown when an array is accessed with an index that is out of its bounds?CorrectIncorrect
- Question 10 of 10
What is the difference between ArrayList and LinkedList in Java?CorrectIncorrect