Career Growth · interview question
In a code review, what is a severe concurrency issue you might spot in a Java program?
Multiple choiceHardchapter-20-curatedpremiumcareer-growthtransitioning-to-senior
Answer and explanation
Correct answer
A. Implementing a singleton with double-checked locking without volatile.
Why
Using double-checked locking without the volatile keyword can lead to a severe concurrency issue due to improper memory visibility guarantees. The volatile keyword ensures changes to a variable are visible to all threads, which is crucial for thread-safe singleton implementation.
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