22 questions for “JRE & Memory”

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C# Arrays, Span<T> & Memory<T> 1

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1What is the role of Span<T> and Memory<T> in .NET, and why can't Span<T> be used inside an async method? C# › Arrays, Span<T> & Memory<T>C#Arrays, Span<T> & Memory<T>Advanced
2What is garbage collection in the JVM, and what fundamental problem does it solve compared to manual memory management (like in C/C++)? Java › Garbage CollectionJavaGarbage CollectionBeginner
3What is the difference between Error and Exception in Java's Throwable hierarchy, and why should application code generally avoid catching Error subclasses like OutOfMemoryError or StackOverflowError? Java › ExceptionsJavaExceptionsIntermediate
4How does an inner class's implicit reference to its outer instance create a potential memory leak risk, and in what specific scenario does this become a genuine practical concern? Java › Inner Classes & Anonymous ClassesJavaInner Classes & Anonymous ClassesIntermediate
5How does the Java Memory Model's happens-before relationship formally define when changes made by one thread are guaranteed to be visible to another thread, and what role does the volatile keyword play? Java › Concurrency & ThreadsJavaConcurrency & ThreadsAdvanced
6How would you implement memory-mapped file I/O using MappedByteBuffer, and what performance advantage does this provide for very large files compared to traditional stream-based reading? Java › I/O & NIOJavaI/O & NIOAdvanced
7What is the role of the ClassLoader in the JVM, and what are the three built-in bootstrap/platform/application class loaders? Java › Class Loading & Bytecode VerificationJavaClass Loading & Bytecode VerificationBeginner
8What does it mean for an object to be 'eligible for garbage collection' in terms of reachability from GC roots? Java › Garbage CollectionJavaGarbage CollectionBeginner
9What is the parent delegation model in Java class loading, and why is it important for security and consistency? Java › Class Loading & Bytecode VerificationJavaClass Loading & Bytecode VerificationIntermediate
10What are the phases of class loading (loading, linking, initialization), and what specifically happens during each? Java › Class Loading & Bytecode VerificationJavaClass Loading & Bytecode VerificationIntermediate
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