Essential Java 8 Features and Top Interview Questions | Java for Developers

Описание: 💡 Master the Most Important Java 8 Features — and Get Ready for Interviews!
In this video, we’ll cover all the essential Java 8 features that every developer must know — from Lambda Expressions and Streams to Optional and Default Methods — along with real-world examples and popular interview questions you can expect in coding interviews.

By the end, you’ll understand how and why Java 8 transformed the language and how to confidently explain its features in interviews.

You’ll learn:
✅ Key new features introduced in Java 8
✅ How to use Lambdas, Streams, Optional, and Method References
✅ Functional Interfaces and Default/Static Methods
✅ Java 8 Date & Time API
✅ Common interview questions with answers and examples

💬 Perfect for Java developers, interview prep, and anyone upgrading from older Java versions!

💡 Timestamps (YouTube Chapters)

0:00 – Intro: Why Java 8 Is a Game Changer
1:00 – Overview: Major Features in Java 8
2:30 – Lambda Expressions Explained
4:30 – Functional Interfaces (Predicate, Function, Consumer, Supplier)
6:30 – Method References (:: operator)
7:45 – Stream API (filter, map, collect, reduce)
10:15 – Optional Class – Avoiding NullPointerExceptions
12:00 – Default & Static Methods in Interfaces
13:30 – Java 8 Date & Time API (LocalDate, LocalTime, LocalDateTime)
15:00 – forEach() and Iteration Improvements
16:15 – Parallel Streams (Introduction & Caution)
17:00 – Common Java 8 Interview Questions
19:00 – Sample Coding Task: Streams & Lambdas
21:00 – Recap & Interview Tips
22:00 – Outro: Next Topic – Java 9 Features & Updates

🧠 Sample Interview Questions Covered

What is a Lambda Expression and how is it different from an anonymous class?

What is a Functional Interface? Name a few built-in ones.

How does the Stream API differ from Collections?

What is the purpose of the Optional class?

How do you create and use Method References?

What are Default and Static methods in interfaces?

Explain the difference between map() and flatMap() in Streams.

What are some key improvements in the Date and Time API?

How do Parallel Streams work, and when should you use them?

Write a Stream example that filters even numbers and sums them.

📌 Hashtags

#Java8 #JavaInterview #LearnJava #JavaStreams #JavaLambda #JavaProgramming #CodingInterview #JavaDeveloper #TechInterview