Design a JSON Merge API with Pluggable Behaviors
Last updated: August 5, 2026
Quick Overview
Design a JSON Merge API that allows for customizable merging behaviors through a pluggable architecture.
Tesla
August 5, 20265
0
64 solved
Design a JSON Merge API that allows for customizable merging behaviors through a pluggable architecture.
This question is typically asked in the technical screening round at Tesla to evaluate a candidate's understanding of API design and their ability to implement flexible and maintainable code. The interviewer is looking for the candidate's ability to think critically about how to structure an API that can accommodate various merging strategies while ensuring ease of use and extensibility.
What the Interviewer Expects
- Clearly define the requirements for the JSON Merge API.
- Outline a high-level design that includes the main components and their interactions.
- Discuss how to implement pluggable behaviors for merging strategies.
- Consider error handling and edge cases in the design.
- Explain how the design can be tested and validated.
Key Topics to Cover
How to Approach This
- Apply SOLID principles. Single Responsibility makes code testable, Open/Closed makes it extensible.
- Choose data structures based on access patterns, not familiarity.
- Prefer immutable data and message passing over shared mutable state for concurrency.
- Design APIs with RESTful conventions, versioning, meaningful errors, and pagination from day one.
Possible Follow-up Questions
- How would you handle conflicting keys during the merge?
- Can you describe a scenario where a specific merging strategy would be beneficial?
- What testing strategies would you employ to ensure the API works as intended?
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Practice System Design ProblemsSample Answer
Requirements
The JSON Merge API should allow users to merge multiple JSON objects into one. It needs to support customizable merging behaviors through a pluggable architecture, enabling users to define how conflic...
High-Level Design
The API will consist of the following components: 1. Merge Function: The core function that takes an array of JSON objects and a merging strategy. 2. Strategy Interface: An interface that all ...
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