面试题参考，前面数字代表题目估计需要的回答时间（分钟），部分后面括号代表答案重点。
[Common]
- (3m) Self introduction.
- (5m) Work experience.
- (3m) What is your favorite job?
- (3m) What is your role in your job?
- (5m) What is the most difficulty you had in your job? How did you deal with it?
- (3m) What is your next 3 years' career plan?
[SQL]
- (1m) What is the difference between primary key and unique key? (primary key cannot be null, unique key can be null)
- (1m) How to filter the result set when using grouping? (use having)
- (3m) What is the difference between bitmap index and b-tree index? How do they work?
- (3m) When to use "in" and when to use "exists"? (where a.id in (b.id), b.id should be a small set; where a.id exists (select 1 from b where b.id=a.id), b.id is a big set)
- (5m) What is the difference between inner join, outer join and cross join?
- (5m) What is the difference between hash join and sort merge join?
- (3m) What should we pay attention when checking the SQL execution plan? （table full access, nest loop)
- (3m) Give some advice on SQL tuning.
[BigData]
- (1m) What is HDFS?
- (1m) What is Yarn used for?
- (3m) What is parquet file?
- (3m) What is Spark?
- (3m) What is the difference between Spark RDD, DataFrame and DataSet?
[Programming]
- (1m) In MQ, what is the difference between topic and queue?
- (1m) What is asynchronous call used for?
- (1m) What is thread safe?
- (1m) What is deadlock, for example?
- (3m) If your Java application got hang in Linux environment, list out the things you want to check in sequence.
- (3m) What is micro service?
- (3m) Why we need to consider the consistency in distributed system?
- (3m) What is SQL injection? How to prevent?
- (1m) What is DDOS?
[CICD]
- (1m) Your understanding of Agile.
- (1m) What is the concept of git commit, branch, tag?
- (3m) The experience of maven, nexus, jenkins, or any other build tool.
[Cloud Computing]
- (3m) Comparing to VM, what is the advantage that container can provide?
- (3m) Give any sample of network file system, and object storage?
- (3m) How to setup SSH key exchange?