From telecommuting to rejection of your resume, to getting Ali's offer, this PDF of "The Most Comprehensive Test Questions for Java Post" is indispensable

From a personal point of view, whether it is to get rid of difficulties or pursue better development, as long as it helps to improve one's own ability, conforms to one's career development plan, and quit, it is a good choice in itself. So the question is, how do Java people in the bottleneck period deal with rounds of technical interviews?

If the personal technology is insufficient and the mainstream market demand is not understood, the result can be imagined.

Recently, we have collected the latest interview questions from companies such as Alibaba, ByteDance, Baidu, NetEase, Tencent, Meituan, etc., and sorted out the technical points into a large and comprehensive "Java post most comprehensive test question". PDF (actually more than expected Spent a lot of energy)

This PDF interview document includes Kafka, RabbitMQ, Linux, Spring, SpringBoot, SpringCloud, SpringMVC, microservices, concurrent programming, MySQL, Redis, Memcached, Elasticsearch, Dubbo, Zookeeper, Mybatis, algorithms and data structures, etc., due to limited space , Here is a part of it in the form of pictures.

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Kafka

1. There are three key differences between Kafka and traditional MQ messaging systems
2. Talk about the three mechanisms of kafka's ack
3. Consumer failure, how to solve the livelock problem?
4. In the case of Kafka distributed (not stand-alone), how to ensure the sequential consumption of messages?
5. What is the high availability mechanism of Kafka?

 

 

RabbitMQ

1. What are the benefits of using RabbitMQ?
2. How to ensure that the message is not lost?
3. How to avoid repeated delivery or repeated consumption of messages?
4. What transmission is the message based on?
5. How is the message distributed?

 

Linux

1. How to check the current process? How to perform exit? How to check the current path?
2. What command is used for directory creation? What command is used to create a file? What command is used to copy files?
3. What commands can be used to view file contents?
4. How to make a command run in the background?
5. What command is used to terminate the process? What parameters?

 

Spring

1. What is the Spring framework? What are the main modules of the Spring framework?
2. What are the benefits of using the Spring framework?
3. What are the different types of events in the Spring framework?
4. What design patterns are used in the Spring framework?
5. What is Inversion of Control (IOC)?

 

SpringBoot

1. What is Spring Boot?
2. What are the advantages of Spring Boot?
3. What is JavaConfig?
4. How to reload changes on Spring Boot without restarting the server?
5. What is the monitor in Spring Boot?

 

SpringCloud

1. What is Spring Cloud?
2. What are the advantages of using Spring Cloud?
3. What does service registration and discovery mean? How to achieve Spring Cloud?
4. What is the significance of load balancing?
5. What is Hystrix? How does it achieve fault tolerance?

 

 

SpringMVC

1. What is SpringMvc?
2. Advantages of Spring MVC:
3. How does SpringMVC work?
4. SpringMVC process?
5. Is the controller of SpringMvc a singleton mode? If so, what are the problems and how to solve them?

 

Microservice

1. What are the advantages of microservice architecture?
2. What is the difference between monolithic, SOA and microservice architecture?
3. What is the main difference between SOA and microservice architecture?
4. What is Spring Cloud?
5. What problems does Spring Cloud solve?

 

Concurrent programming

1. Three elements of concurrent programming?
2. The value of multithreading?
3. What are the ways to create threads?
4. Advantages of thread pool?
5. The role of the volatile keyword

 

 

MySQL

1. Does MySQL support transactions?
2. The MySQL database is used for the storage of the publishing system, with an increment of more than 50,000 entries per day. It is expected to operate and maintain for three years. How to optimize?
3. The underlying implementation principle and optimization of the index
4. How to optimize MySQL in practice
5. Explain the difference between MySQL outer connection, inner connection and self connection

 

Redis

1. Have you ever used Redis cluster and what is the principle of cluster?
2. Under what circumstances will the Redis cluster solution cause the entire cluster to be unavailable?
3. What are the commands related to Redis transactions?
4. Do you understand the synchronization mechanism of Redis?
5. Are there any ways to reduce the memory usage of Redis?

 

 

Memcached

1. How does memcached handle fault tolerance?
2. How to batch import and export items in memcached?
3. What is multithreading in memcached? How to use them?
4. What is the maximum key length that memcached can accept?
5. What is the maximum size of a single item that memcached can store?

 

 

Elasticsearch

1. How does the client select a specific node to execute the request when connecting to the cluster?
2. Describe in detail the process of Elasticsearch indexing documents.
3. In Elasticsearch, how do you find the corresponding inverted index based on a word?
4. For GC, what should I pay attention to when using Elasticsearch?
5. In the case of concurrency, what if Elasticsearch guarantees consistent reading and writing?

 

 

Mybatis

1. What is the use of Mybatis dynamic sql? How does it work? What are the dynamic SQL?
2. In the Xml mapping file, besides the common select|insert|updae|delete tags, what other tags are there?
3. Why is Mybatis a semi-automatic ORM mapping tool? What is the difference between it and fully automatic?
4. Talk about one-to-one, one-to-many related queries?
5. There are several ways to realize one-to-one in MyBatis? How to operate?

 

 

Dubbo

1. Why use Dubbo?
2. The difference between Dubbo and Spring Cloud?
3. Does Dubbo support distributed transactions?
4. Does Dubbo support service downgrades?
5. What are the layers of Dubbo's overall architecture design?

 

 

Zookeeper

1. How does zookeeper ensure the sequential consistency of transactions?
2. Why is there a Master in a distributed cluster?
3. How to deal with zk node downtime?
4. The difference between zookeeper load balancing and nginx load balancing
5. The connection and difference between ZAB and Paxos algorithm?

 

 

The detailed information of the PDF document is too comprehensive, and there are too many details. In order not to affect the appreciation of the article, only some of the knowledge points are screenshots for a rough introduction. Each small node has more detailed content! Code friends in need can help like + follow, click here to get it for free!

Catalogue outline