Question 1

Why is setImmediate() asked in interviews?

Accepted Answer

Because understanding it requires knowledge of Event Loop phases and Node.js internals.

Question 2

What is setImmediate() in Node.js?

Accepted Answer

setImmediate() schedules a callback to execute during the Check Phase of the Event Loop.

Question 3

When does setImmediate() execute?

Accepted Answer

It executes after the Poll Phase when the Event Loop enters the Check Phase.

Question 4

Is setImmediate() the same as setTimeout(fn, 0)?

Accepted Answer

No. setTimeout executes in the Timers Phase, while setImmediate executes in the Check Phase.

Why is setImmediate() asked in interviews?

More FAQs in What Is setImmediate() in Node.js?