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Design an Online Coding Contest Platform
Sandboxing and ContainerizationMessage Queues and Asynchronous ProcessingDistributed Systems Design and ScalabilityDatabase Design and Consistency ModelsResource Management and Monitoring
Design an Online Coding Contest Platform
Design a comprehensive online coding challenge platform capable of supporting both regular practice problems and live, scheduled contests.
Functional Requirements
- User Interaction: Users must be able to browse available problems, read problem statements, select a programming language, submit their code, and receive a verdict for their submission. Supported verdicts include: Accepted, Wrong Answer, Time Limit Exceeded, Compile Error, and Runtime Error.
- User History: Users should be able to view their complete submission history and basic statistics related to problems they have attempted.
- Admin Capabilities: Administrators need the ability to create new problems, upload hidden test cases for judging, configure time and memory limits for each problem, and define the set of supported programming languages.
- Contest Mode: The platform must support a dedicated contest mode, including features for scheduling contests, allowing participants to register, handling contest-specific submissions, calculating scores, maintaining rankings, and displaying live leaderboards.
Non-Functional Requirements
- Security: All user-submitted code is considered untrusted and must be executed in a secure and isolated environment to prevent system compromise or interference with other submissions.
- Scalability: The judging system must be highly scalable to effectively handle significant traffic spikes, particularly during live contests.
- Performance: The system should provide reasonably low-latency feedback for normal problem submissions, while strictly preserving correctness and isolation guarantees.
- Data Management: Discuss appropriate database choices and their associated tradeoffs for storing various types of data, including users, problems, submissions, contests, test cases, and leaderboards.
Key Focus Area
Pay particular attention to the architectural considerations and mechanisms required for safely executing third-party submitted code.
AI interview prep
Core dilemma
Balancing the extreme security requirements of executing untrusted, potentially malicious code with the demands for high throughput, low latency, and robust scalability, especially during high-stakes live contests.
Mid-level signals3
Senior signals3
Red flags4
3 tradeoffs and 3 stress tests locked
Interview prep
Unlock the interviewer X-Ray rubric, tradeoff matrix, stress tests, clarifying questions, and key concepts.
Design an Online Coding Contest Platform
Sandboxing and ContainerizationMessage Queues and Asynchronous ProcessingDistributed Systems Design and ScalabilityDatabase Design and Consistency ModelsResource Management and Monitoring
Design an Online Coding Contest Platform
Design a comprehensive online coding challenge platform capable of supporting both regular practice problems and live, scheduled contests.
Functional Requirements
- User Interaction: Users must be able to browse available problems, read problem statements, select a programming language, submit their code, and receive a verdict for their submission. Supported verdicts include: Accepted, Wrong Answer, Time Limit Exceeded, Compile Error, and Runtime Error.
- User History: Users should be able to view their complete submission history and basic statistics related to problems they have attempted.
- Admin Capabilities: Administrators need the ability to create new problems, upload hidden test cases for judging, configure time and memory limits for each problem, and define the set of supported programming languages.
- Contest Mode: The platform must support a dedicated contest mode, including features for scheduling contests, allowing participants to register, handling contest-specific submissions, calculating scores, maintaining rankings, and displaying live leaderboards.
Non-Functional Requirements
- Security: All user-submitted code is considered untrusted and must be executed in a secure and isolated environment to prevent system compromise or interference with other submissions.
- Scalability: The judging system must be highly scalable to effectively handle significant traffic spikes, particularly during live contests.
- Performance: The system should provide reasonably low-latency feedback for normal problem submissions, while strictly preserving correctness and isolation guarantees.
- Data Management: Discuss appropriate database choices and their associated tradeoffs for storing various types of data, including users, problems, submissions, contests, test cases, and leaderboards.
Key Focus Area
Pay particular attention to the architectural considerations and mechanisms required for safely executing third-party submitted code.