The Event Loop checks the first. It finds the Promise callback and logs 'Promise' .

Code it Out: Open your console and test the snippets yourself.

function debounce(func, delay) let timer; return function(...args) const context = this; clearTimeout(timer); timer = setTimeout(() => func.apply(context, args); , delay); ; Use code with caution. Implementation of Throttle: javascript

Holds promises, MutationObserver , and queueMicrotask . This queue has higher priority.

function memoize(fn) { const cache = {}; return function(...args) const key = JSON.stringify(args); if (cache[key]) return cache[key]; const result = fn.apply(this, args); cache[key] = result; return result; ; } Use code with caution. Final Strategy Checklist for Your Technical Round

The Event Loop continuously monitors the Call Stack and checks if it is empty. If empty, it processes tasks from the queues.

Do not write code immediately. Ask about edge cases, input types, and expected error handling.

5. Deep Dive: Differentiate between call() , apply() , and bind() .

To pass any intermediate to senior JavaScript interview, you must understand how code executes under the hood. The Execution Context and Call Stack