Walk me through integrating two systems where one sends data through webhooks and the other only accepts batch uploads.

What the interviewer is looking for

• This question tests apis & system integration. Explains webhooks, REST calls, authentication, pagination, rate limits and data mapping between systems.
• Strong answers: Receives and verifies webhooks, stores events durably, batches on a schedule, maps fields, handles duplicates and failed uploads.
• Likely follow-up: What if the warehouse rejects some rows in a batch?

Another way it may be asked: The online store pushes each order as it happens, but the warehouse system only takes a file every hour. How would you connect them?

A structure to follow: Answer, explain, example, limits

1. Step 1

   Answer

   Give your direct answer in the first sentence so the interviewer knows where you are going.

2. Step 2

   Explain

   Say how it works or why you would do it that way, in plain words before jargon.

3. Step 3

   Example

   Anchor it in something you have actually done or seen, with the detail that shows hands-on experience.

4. Step 4

   Limits

   Say when your approach would not be the right one. It shows judgement.

This is guidance on shape, not a script. Use your own real experience and facts; never invent details to fill a gap. See the STAR guide and answer frameworks.

Common slips

• Reciting a definition without showing you have applied it.
• Using terms you cannot explain if asked a level deeper.
• Claiming experience beyond what you can discuss in detail.

How to practise it

Say the answer in 90 seconds, then answer the follow-up as if it were a new question.

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