Question 1

How to install Zui Online Judge on Ubuntu?

Accepted Answer

Follow the README's environment preparation: install Ubuntu with jdk1.8, mysql8.0, and redis, then set up go-judge on port 5050 using binary or Docker. Note that backend and frontend startup steps are marked 'todo', so additional configuration may be needed.

Question 2

Does ZOJ support JavaScript or other languages?

Accepted Answer

Currently, ZOJ supports C/C++, Java, Python, and Go. While the system is extensible, adding new languages isn't documented, requiring custom development and integration with the sandbox.

Question 3

ZOJ vs HustOJ: which is better for a university coding competition?

Accepted Answer

ZOJ offers a modern microservices architecture with Spring Cloud for scalability and go-judge for robust security, but has incomplete documentation. HustOJ is older but may have more community resources. Choose ZOJ if you prioritize scalability and can handle the setup complexity.

Question 4

How to add custom programming problems to ZOJ?

Accepted Answer

The README doesn't specify, but based on the architecture, you'd likely need to configure the backend services and database. Since documentation is sparse, you might need to explore the codebase or contribute to the project.

Question 5

What security measures does ZOJ use for code execution?

Accepted Answer

ZOJ integrates go-judge sandboxing with strict limits on CPU, memory, and processes, as shown in the locale tests. This isolates untrusted code, preventing system damage and ensuring fair evaluation.

Question 6

Can ZOJ handle a high volume of submissions during contests?

Accepted Answer

With its distributed Spring Cloud backend, ZOJ is designed for scalability. However, performance depends on proper deployment and tuning, which isn't fully detailed, so load testing and configuration are recommended.

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