Build an API Data App | Dataford Interview Questions

Tell me about how you would create a mobile app that reads and displays data from an API.

Implement the data-preparation portion: deduplicate API records by id, retain the record with the newest published_at, sort records newest first, and return at most limit records.

Signature: prepare_feed(items, limit). Each item is a dictionary with string keys id, title, and ISO-8601 UTC string published_at; return a list of dictionaries.

Constraints

0 <= limit <= 10^5
0 <= len(items) <= 10^5
Each item contains string fields id, title, and published_at
published_at values use the same ISO-8601 UTC format
If duplicate records have equal timestamps, retain the first occurrence

Function Signature

def prepare_feed(items, limit):

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