24 common Elasticsearch interview questions (intercept part)
1. When the client is connected to the cluster, how to select a specific node to execute the request?
2. Describe in detail the process of Elasticsearch indexing documents.
3. Describe in detail the process of Elasticsearch updating and deleting documents.
4. Describe in detail the search process of Elasticsearch.
5. In Elasticsearch, how to find the corresponding inverted index based on a word?
6. When deploying Elasticsearch, what are the optimization methods for Linux settings?
7. For GC, what should I pay attention to when using Elasticsearch?
8. How does Elasticsearch achieve aggregation of large amounts of data (on the order of hundreds of millions)?
9. In the case of concurrency, if Elasticsearch guarantees consistent reading and writing?
10. How to monitor the status of Elasticsearch cluster?
30 Dubbo high frequency interview questions
1. What is the difference between Dubbo SPI and Java SPI?
2. Does Dubbo support distributed transactions?
3. Can Dubbo cache the results?
4. How does the service go online compatible with the old version?
5. What packages must Dubbo have to rely on?
6. What can the Dubbo telnet command do?
7. Does Dubbo support service downgrade?
8. How does Dubbo shut down gracefully?
9. What is the difference between Dubbo and Dubbox?
10. What is the difference between Dubbo and Spring Cloud?
50 Java Microservices Interview Questions
1. What is the use of WebMvcTest annotations in Spring MVC applications?
2. Can you give the main points about rest and microservices?
3. What are the different types of microservice testing?
4. What do you know about Distributed Transaction?
5. What is Idempotence and where is it used?
6. What is a bounded context?
7. What is two-factor authentication?
8. What are the types of credentials for two-factor authentication?
9. What is a client certificate?
10. What is the use of PACT in the microservices architecture
28 ZooKeeper interview questions
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ZooKeeper interview questions?
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What does ZooKeeper offer?
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Zookeeper file system
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ZAB agreement?
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Four types of data nodes Znode
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Zookeeper Watcher mechanism-data change notification
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Client registration Watcher implementation
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The server handles Watcher implementation
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Client callback callback
- ACL permission control mechanism
18 kafka high frequency interview questions
1. How to get a list of topic topics
2. What is the command line for producers and consumers?
3. Is the consumer pushing or pulling?
4. Talk about the method of Kafka maintaining consumption status tracking
5. Talk about master-slave synchronization
6. Why do I need a messaging system, can mysql not meet the demand?
7. What is the role of Zookeeper for Kafka?
8. What are the three transaction definitions for data transmission?
45 Linux interview questions
1. What symbol is used to indicate the absolute path? What is the current directory and upper directory used for? What is the main directory? What command is used to switch directories?
2. How to view the current process? How to exit? How to view the current path?
3. How to clear the screen? How to exit the current command? How to perform sleep? How to check the current user id? What command is used to view the specified help?
4. What function does the Ls command perform? What parameters can be taken and what is the difference?
5. Create soft links (shortcuts) and hard link commands.
6. What commands are used to create the directory? What command is used to create the file? What command is used to copy files?
7. What commands can be used to view the file content?
8. Write file commands at will? How to output a string with spaces, such as "helloworld" to the screen?
9. Which file in which folder is the terminal? Which command in which folder is the black hole file?
10. Which command is used to move files? Which command should be used to rename?
22 Spring Boot interview questions
1. What is Spring Boot?
2. What are the advantages of Spring Boot?
3. What is JavaConfig?
4. How to reload the changes on Spring Boot without restarting the server?
5. What is the monitor in Spring Boot?
6. How to disable Actuator endpoint security in Spring Boot?
7. How to run Spring Boot application on a custom port?
8. What is YAML?
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