Java Programming Interview Guide : 200+ Questions & Answers Course Course

Module 1: Course Introduction & Interview Mindset

⏳ 20 minutes

• Understand the structure and goals of the course.

• Learn proven strategies for approaching technical interviews.

• Tips for framing answers and handling tricky follow-ups.

Module 2: Core Java Concepts

⏳ 1 hour

• Questions on data types, operators, and control flow.

• Deep dive into inheritance, polymorphism, and encapsulation.

• Best-practice explanations for common pitfalls.

Module 3: Object-Oriented Design & Patterns

⏳ 1 hour

• Discuss SOLID principles and their interview applications.

• Review key design patterns: Singleton, Factory, Observer, Strategy.

• Sample questions on applying patterns to solve real problems.

Module 4: Collections Framework & Generics

⏳ 1 hour

• Compare List, Set, and Map implementations and their performance.

• Explain generics, wildcards, and type safety in collections.

• Answer design and complexity questions for common operations.

Module 5: Exception Handling & I/O

⏳ 45 minutes

• Differentiate checked vs. unchecked exceptions.

• Write robust try-with-resources examples.

• Handle file and network I/O in interview code snippets.

Module 6: Multithreading & Concurrency

⏳ 1 hour

• Thread lifecycle, synchronization, and locks.

• Discuss volatile, synchronized, and higher-level constructs.

• Answer concurrency challenges like deadlocks and thread safety.

Module 7: Java 8+ Features

⏳ 45 minutes

• Lambda expressions, functional interfaces, and method references.

• Stream API operations and parallel streams discussion.

• Default and static methods in interfaces.

Module 8: JVM Internals & Performance Tuning

⏳ 45 minutes

• Explain class loading, garbage collection, and memory regions.

• Tuning JVM flags and troubleshooting memory leaks.

• Sample tuning questions with practical examples.

Module 9: Advanced Topics & Best Practices

⏳ 30 minutes

• Discuss annotations, reflection, and module system.

• Explain dependency injection concepts.

• Best practices for clean, maintainable Java code.

Module 10: Mock Interview & Answer Strategies

⏳ 1 hour

• Simulated interview walkthrough with timed questions.

• Feedback on answer structure and depth.

• Final tips for follow-up questions and behavioral scenarios

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