Master the CCBank Online Interview: 30+ Must‑Know Backend Questions
This article outlines the first, second, and HR interview rounds for a CCBank online position, detailing over thirty technical and behavioral questions covering Elasticsearch, Redis, Spring Cloud, JVM, data structures, performance optimization, and candidate queries, followed by a concise summary.
First Round (35 min)
Self‑introduction
Details of internship projects
Specific operations of Elasticsearch
Common Redis data structures
How to cache user‑profile tags
ArrayList, LinkedList
HashMap, Hashtable
Specific components of Spring Cloud
Implementation and role of the project gateway
Understanding threads and thread pools
JVM memory model, garbage‑collection algorithms, determining reclaimability
Hand‑write: implement
String.equals()Candidate Questions
Business and technology stack
Interview evaluation and suggestions
Second Round (30 min)
Self‑introduction
Details of internship projects
Performance optimization (SQL, concurrency)
Slow SQL optimization
Horizontal sharding and partitioning scenarios
IO‑intensive optimization
Dealing with differing solutions from a technical manager
What is most important in team development
Understanding of agile development
Candidate Questions
Training mechanism
Recommended books
HR Round (16 min)
Self‑introduction
Plans for graduate exams? Reasons?
Current offers
Views on internships
How to quickly learn a new tech stack
Most recent achievement
Internship gains and reflections
Hobbies
Open‑source project status
How to resolve work conflicts
Are you an only child? Have a partner?
Preferred work location
Focus points when evaluating offers
Candidate Questions
Working hours
Training system
Summary
The questions are relatively basic; coding tasks are simple and may involve some business‑scenario problems.
That concludes the interview experience; can you answer these yourself?
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