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Java 8 Interview Questions with Real-Time Examples
Java 8 introduced powerful features like Lambda Expressions, Streams, and Functional Interfaces—but are you truly ready to answer real interview questions?This guide covers the most frequently asked Java 8 interview questions with clear explanations and practical examples to help you crack your next interview with confidence. Program1 : Write a program that, given a list of integers, extracts and returns only the even numbers from the input collection. Program2 : Write a program to Find the maximum number of given list using java8 Program3: Write a program to Find duplicate elements in a list What is Collections.frequency()?. It counts how many times an element (o) appears in a collection (c).frequency()…
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Java 8 Features
Java 8 was introduced to modernize Java by adding functional programming features, improving performance, and making the language more concise, readable, and expressive. It aimed to reduce boilerplate code, improve parallel processing, and enable more declarative coding styles—especially important for handling large data collections and multi-core processors. Lambda Expressions 2. Functional Interfaces 3. Default Method in Interface 4.Static Method in Interface Interface MyInterface { default void show() { System.out.println("Default method"); }} 5. Stream API list.stream().filter(s -> s.startsWith("A")).collect(Collectors.toList()); Intermediate (Non-Terminal) operations Example : Terminal operations 6. Method References 7. Optional Class 8. New Date and Time API (java.time package) Old API problems: New API advantages: 9. Collectors Class Commonly Used Collectors…