Design a Configurable Order Validator with DAG Dependencies
Last updated: July 31, 2026
Quick Overview
Design a configurable order validator that can handle dependencies represented as a Directed Acyclic Graph (DAG).
ByteDance
July 31, 20264
0
29 solved
Design a configurable order validator that can handle dependencies represented as a Directed Acyclic Graph (DAG).
This question is typically asked during the technical screening round to assess a candidate's ability to design complex systems that require an understanding of data structures and algorithms. The interviewer is evaluating the candidate's problem-solving skills, their ability to think through system requirements, and how well they can implement a solution that is both efficient and maintainable.
What the Interviewer Expects
- Clearly define the requirements for the order validator.
- Design a scalable high-level architecture using a DAG to represent dependencies.
- Discuss potential edge cases and how to handle them.
- Provide a detailed deep dive into the core components of the system.
- Explain trade-offs in design decisions and how to scale the solution.
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 circular dependencies in the DAG?
- What strategies would you use to optimize the validation process?
- Can you explain how you would test this order validator?
Sharpen Your Skills on Codemia
Practice similar problems with our interactive workspace, get AI feedback, and track your progress.
Practice System Design ProblemsSample Answer
Requirements
To design a configurable order validator, we first need to establish the requirements. The validator should be able to process orders with various dependencies, ensuring that all prerequisites are met...
High-Level Design
The system can be designed using a Directed Acyclic Graph (DAG) to represent the dependencies between different orders. Each node in the DAG represents an order, while the edges represent the dependen...
Submit Your Answer
