Instruction: Explain the garbage collection process in JavaScript and how it helps manage memory.
Context: This question tests the candidate's knowledge of memory management in JavaScript and how garbage collection contributes to efficient memory use.
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JavaScript employs an automatic garbage collection strategy, which means developers don't need to manually free up memory. This is crucial in preventing memory leaks and allowing us to focus on the core logic of our applications. The garbage collection mechanism uses two primary algorithms: mark-and-sweep and reference-counting.
Initially, JavaScript utilized the reference-counting algorithm, which tracks the number of references to an object. When the number of references drops to zero, meaning no part of your application is using that piece of data, it is considered garbage and gets collected. However, this approach has a significant drawback in the form of circular references, where two objects reference each other,...