Question 1

Why must the call stack be empty for setTimeout callbacks to run?

Accepted Answer

Because the event loop only moves callbacks from the queue onto the stack when the stack is empty. If a synchronous function is still running, queued callbacks wait.

Question 2

What data structure is used by the Call Stack?

Accepted Answer

The Call Stack follows the Last-In-First-Out (LIFO) principle.

Question 3

Why is the Call Stack important?

Accepted Answer

It tracks function execution and execution contexts.

Question 4

Can the Call Stack overflow?

Accepted Answer

Yes. Excessive recursion can lead to a stack overflow error.

Why must the call stack be empty for setTimeout callbacks to run?

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