


What are concurrent collections in Java? Why are standard collections like `ArrayList` and `HashMap` not thread-safe for concurrent access?
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java what is synchronized Informational
- How does thread safety relate to the scalability of concurrent Java applications? What are some design patterns that help in building thread-safe Java components?
- How has the memory model changed in Java 5 to address issues like double-checked locking? What are memory barriers (or fences) and how do they relate to synchronization and the Java Memory Model?
- How does synchronization in Java relate to concepts like mutual exclusion and critical regions in concurrent programming theory? Can you explain the concept of condition variables in concurrent programming and how they are implemented in Java using `wait()/notify()` or `Condition` objects?
- How has the JMM evolved over different versions of Java? Are there any tools or techniques to help visualize or reason about the memory model and happens-before relationships in Java?
- How does the JMM relate to the underlying hardware memory architecture?
- How do executors simplify the management of threads compared to manual thread creation? What are futures and callables in Java concurrency and how do they relate to synchronization?
- How are thread-local variables different from shared variables?
- What are the common certification standards or guidelines that address thread safety in software development? How can code reviews help in identifying potential thread safety issues in Java?
- When should you consider using atomic variables instead of `synchronized` blocks? What are the challenges in debugging multithreaded Java applications with synchronization?
- How does `CopyOnWriteArrayList` ensure thread safety?
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