Jigou Technology Interview Experience - First Interview

May 27, 2023#面试133

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The interview for a DevOps developer position took place in May 2023 and lasted 52 minutes. It focused on open-ended questions rather than standard interview formats. Key topics included: - Challenges faced during database migration, with a discussion on various databases beyond MySQL and PostgreSQL. - Considerations for database comparison, including performance and future scalability. - Differences between container scalability and physical servers. - Concepts of vertical and horizontal database scaling, particularly for MySQL and PostgreSQL. - Ensuring data consistency after database scaling. In the Java section, the candidate was asked about familiarity with open-source components, understanding of object-oriented vs. procedural programming, Spring AOP implementation, and the core logic and benefits of Spring dependency injection. The interview also included a logical problem about programming language proficiency among employees and an algorithm question regarding finding the k-th largest element in an unsorted array, with a focus on time and space complexity.

This interview did not ask too many standard questions, but rather some divergent ones.

Position: DevOps Developer
Time: May 2023
Interview Duration: 52 minutes

Project#

Talk about a challenging area where you gained a lot.
- Besides MySQL and PostgreSQL databases, have you considered and compared other databases in the migration process?
- What aspects are there for database comparison (besides performance, have you considered whether future data growth might cause bottlenecks)? How did you make decisions and considerations on different points? Can you elaborate?
- How does the scalability of containers compare to physical servers?
- What are vertical and horizontal scaling for databases?
- How is horizontal scaling achieved for MySQL and PostgreSQL databases, and what are the differences between them?
- How is data consistency ensured after database scaling (discuss commonly used methods in the industry)?

Java#

Which open-source components are you familiar with in the Java community? Share your understanding.
Explain your understanding of object-oriented and procedural programming.
The implementation logic of Spring AOP aspects.
What is the core logic of Spring dependency injection and what benefits does it bring?

Logic Question#

In a company of 100 people, 75 know C++, 90 know Java, and 60 know Go. What is the maximum and minimum number of people who know all three languages?

Algorithm Question#

Inquire about the time and space complexity of the implementation.