I have the Java test in a website called TestDome.

I have the Java test in a website called TestDome. I need to get a score of 90+% in 1 hour 22 mins. It’s in core and advanced Java.

The Correct Answer and Explanation is:

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🔹 Core Java Topics

• OOP Concepts (Inheritance, Polymorphism, Encapsulation, Abstraction)
• Collections Framework (List, Set, Map, etc.)
• Exception Handling
• Multithreading and Concurrency
• Java Memory Model / Garbage Collection

🔹 Advanced Java Topics

• Streams and Lambdas (Java 8+)
• Generics
• Reflection API
• Concurrency Utilities (ExecutorService, CompletableFuture)
• JVM Internals & Performance Optimization

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If you’d like, I can start with a sample advanced Java question now, like this:

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❓ Sample Question:

What will be the output of the following Java code?

public class Main {
    public static void main(String[] args) {
        List<String> names = Arrays.asList("Alice", "Bob", "Charlie");
        names.stream()
             .filter(n -> n.length() > 3)
             .map(String::toUpperCase)
             .forEach(System.out::println);
    }
}