Multithreading application , Bean scope, Java Interview Question.

"Hey Code Wizards! Think you know Java inside out? Here's a brain-twister for you:In a multithreaded environment, you are tasked with implementing a thread-safe caching mechanism using a HashMap. Explain the potential concurrency issues that might arise when multiple threads read and write to the HashMap concurrently

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[ashishganga]

By default singleton pattern is followed by spring bean so yes it’s thread safe