Explain JavaScript Scope, Closures, Timers, and the Event Loop
Company: Apple
Role: Frontend Engineer
Category: Software Engineering Fundamentals
Difficulty: medium
Interview Round: Technical Screen
Overview: Explain JavaScript execution order through scope, closures, host APIs, the event loop, task queues, and microtasks. The interview also examines var versus let in timer callbacks, temporal dead zones, timeout and interval behavior, and the precise role of the HTML defer attribute.
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