Python Data Engineering Coding | Dataford Interview Questions

Tell me about a time you solved a coding problem related to the data lifecycle end to end.

For the coding portion, implement summarize_lifecycle(events). Each event is a dictionary with entity_id, stage, and integer timestamp. Return one dictionary per entity, ordered by entity_id, containing the unique stages in chronological order and the entity's final stage. Events may be unordered, and repeated stages should appear only once.

Input and Output

events is a list of event dictionaries. Return a list of dictionaries with keys entity_id, stages, and final_stage.

Constraints

0 <= len(events) <= 10^4
Each event contains entity_id, stage, and timestamp
entity_id and stage are non-empty strings
timestamp is an integer
Events with equal timestamps retain their input order

Function Signature

def summarize_lifecycle(events):

Your question is Python Data Engineering Coding. 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.

Problem