Java quiz

Test your Java knowledge with a free interactive quiz — 50 questions with answers and explanations. No signup needed to play.

Java code is organized into packages. The role of `package` and `import` is:

1. Java code is organized into packages. The role of `package` and `import` is:
2. A constructor in Java:
3. `this` and `super` refer to:
4. Which collection is best when you need fast random access by index and rarely insert in the middle?
5. When comparing two String values in Java, the correct way is:
6. Streams (`Stream<T>`, introduced in Java 8) are best described as:
7. Generic types like `List<String>` allow:
8. Java's garbage collector is responsible for:
9. A `static` method in Java:
10. A for-each loop in Java works on:
11. Method overriding vs overloading — the difference is:
12. What is the difference between JDK, JRE, and JVM?

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