1. What technologies or frameworks are used for the projects on your resume?
2. Do you know maven and master the basic commands?
3. For the problem of binary tree traversal.
4. What is your understanding of java virtual machine? Explain the definition and understanding of the new generation, middle age and old age
5. Do you know hadoop, hbase, hdfs, hive, spark and elasticsearch?
6. Give an example to show whether you have used the linux operating system and whether you are familiar with the basic instructions.