Senior JavaScript

Test your Senior-level Programming Languages Javascript skills in Programming Software Development. This timed assessment evaluates your expertise in Information Technology.

Duration: 5 minutes

•40 questions

Time Remaining: 05:00

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40 questions remaining

Question 1 of 40Assessment

When analyzing a memory leak in a long-running SPA, why might a closure over a large DOM reference persist after the DOM node is removed?

A. The garbage collector cannot traverse the reference if the closure is attached to a global event listener.

B. The internal [[Scopes]] property of the function keeps the lexical environment alive if the function is reachable.

C. JavaScript's mark-and-sweep algorithm prioritizes heap allocation over stack deallocation for local variables.

D. Closures automatically promote variables to the root context to prevent immediate reclamation during execution.

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