Tricky Core Java Interview Questions – Must-Know for Java Developers!
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🚀 Tricky Core Java Interview Questions – Must-Know for Java Developers!

💡 Are you preparing for Java interviews? Here’s a list of tricky Core Java questions that often confuse even experienced developers! 🎯
🔥 Strings & Memory
🔹 Why is String immutable in Java?
🔹 Difference between StringBuffer and StringBuilder?
🔹 What happens when you modify a string stored in the String Pool?

🏗 Object & Classes
🔹 Can we override static methods? Why?
🔹 What happens if a constructor is private?
🔹 Can we make a class immutable? How?

⚠ Exception Handling
🔹 What happens if an exception is thrown in a finally block?
🔹 Can we have try without catch?
🔹 Checked vs. Unchecked exceptions?

🚦 Multi-threading
🔹 Difference between wait(), sleep(), and yield()?
🔹 Can synchronized methods run in parallel?
🔹 What happens if we call run() instead of start() in a thread?

📚 Collection Framework
🔹 Difference between HashMap and ConcurrentHashMap?
🔹 Can we store null keys in HashMap and Hashtable?
🔹 Why is ArrayList faster than LinkedList for searching?

🔄 JVM & Memory Management
🔹 How does the Garbage Collector work in Java?
🔹 What is PermGen vs. Metaspace?
🔹 What happens if an object has only finalize() and no references?

🤯 Miscellaneous
🔹 What happens if we modify a HashMap while iterating?
🔹 Can we have multiple public classes in a Java file?
🔹 Why does Java not support multiple inheritance?

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