Render Dynamic Card From API | Dataford Interview Questions

Implement a function that takes a JSON string returned by a mock API and converts it into a normalized card object with four required fields: heading, subheading, summary, and image. The input may contain extra fields, missing fields, or invalid JSON. Return the normalized object when valid, or null when the payload cannot produce a complete card.

Constraints

1 <= len(payload) <= 10^5
Input is a JSON string representing a single object
Required source fields are title, subtitle, description, and imageUrl
Ignore extra keys in the payload
Return null for invalid JSON or missing/empty required fields

Function Signature

def parse_card_payload(payload):

Your question is Render Dynamic Card From API. Start with the requirements in the Question tab.

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Problem

Constraints

1 <= len(payload) <= 10^5
Input is a JSON string representing a single object
Required source fields are title, subtitle, description, and imageUrl
Ignore extra keys in the payload
Return null for invalid JSON or missing/empty required fields

Function Signature

def parse_card_payload(payload):

Your question is Render Dynamic Card From API. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.