Moderate Node.js Question 82 of 226

How should you handle errors with async/await in Express?

MERN Full Stack · Speak this in 60–90 seconds · Faridabad & Delhi NCR

PICTURE THIS: STACK VS QUEUE

StackLIFOlast in, first out

QueueFIFOfirst in, first out

Simple meaning

Wrap awaited calls in try/catch or use a wrapper that forwards rejections to next.

WHY — Node.js instead of guessing?

Why interviewers care about Node.js:

Node.js questions separate people

who only read docs from people who shipped.

Keep it short, concrete,

and tied to Full Stack work.

Stay structured

Name the idea, why it exists, then one short example.

Close cleanly

End with when you use it and one common pitfall.

STEPS — What happens step by step?

Before you speak the answer, walk the interviewer through these steps:

1
Wrap awaited calls in
try/catch or use a wrapper that forwards rejections to next.
2
Unhandled promise rejections can
crash the process depending on Node settings.
3
Always map known errors
to 4xx responses and unexpected ones to 500 without leaking stack traces.
4
Give an example
One tiny concrete case you can say aloud.
5
Common mistake
What juniors usually get wrong.
6
Close
When you pick this over the alternative.

EXAMPLE — See it in action

Here's a short line you can speak, broken into clear beats:

Say this line

“Unhandled promise rejections can crash the process depending on Node settings.”

Break into beats

Unhandledpromiserejectionscancrashthe

Speaking order

2987408337471632900

Note: Adapt this scaffold to your own project — keep it under 60–90 seconds.

Key takeaway

Wrap awaited calls in try/catch or use a wrapper that forwards rejections to next. Unhandled promise rejections can crash the process depending on Node settings.