4 aspects of the latest ant team technology in March: thread pool + index + distributed lock + middleware + project, etc.

In fact, in addition to presentation skills and interview skills, it is nothing more than preparation from these aspects:

1. So how to write professional skills?

Ask yourself what you will first, and then see what your intended company needs. What I'm talking about is that the general HR may not know much about technology, (of course, it's not the same for internal staff to interview), so when he screens his resume, he may focus on the keywords of your professional skills. For skills that the company requires but you don't, you can spend a few days in advance to learn it, and then write on your resume that you understand this skill. For example, you can write like this (the following part is taken from your resume, you can make some modifications and improvements according to your own situation):

Basic knowledge of computer network, data structure, algorithm, operating system, etc.: master
Java basics: master
JVM virtual machine (Java memory area, virtual machine garbage algorithm, virtual garbage collector, JVM memory management): master
High concurrency, high availability, high performance system development: master
Struts2、Spring、Hibernate、Ajax、Mybatis、Redis、JQuery ：掌握
SSH integration, SSM integration, SOA architecture: master
Dubbo: Master
Zookeeper: master
Common message queue: master
Linux: Master
MySQL common optimization methods: master
Spring Boot +Spring Cloud +Docker:了解
HDFS, Storm, MapReduce, Hive, Hbase in Hadoop ecological related technologies: understand
Python basics, some common third-party libraries such as OpenCV, wxpy, wordcloud, matplotlib: familiar

One side of the ant flower (one hour):

What are the Java containers? Which are synchronous containers and which are concurrent containers?
How does the thread pool work, and several important parameters?
Given a few specific parameters, what will the analysis thread pool do?
The time complexity of inserting and accessing ArrayList and LinkedList?
The execution process of the HashMap push method?
Java reflection principle, annotation principle?
Talk about the principle of consistent Hash
Under what circumstances will HashMap expand, or what operations will cause expansion?
After HashMap detects a hash conflict, will the element be inserted at the end or the beginning of the linked list?
1.8 also adopted the red-black tree to talk about the characteristics of the red-black tree. Why do people have to use the red-black tree instead of AVL, B-tree, etc.
The difference between https and http, have you used other secure transmission methods?
How many regions are the Cenozoic divided into? What algorithm is used for garbage collection? Why use this algorithm?
The working principle of the thread pool, several important parameters, and then gave a few specific parameters to analyze how the thread pool will do, and finally ask what is the role of the blocking queue?
Code writing: two threads, one thread prints odd numbers, one prints even numbers, and controls alternate printing of odd and even numbers. (There are many ways to achieve, it is best to compare the advantages and disadvantages)
How to check the system load in linux?
Please describe in detail the whole process of springmvc processing request?
Spring process of a bean assembly?
Many projects use Spring. Do you understand the principles of Spring? Principles of AOP and IOC

Ant flower chanting two sides

Know which sorting algorithms, talk about complexity
Shredded merge sort
Which situations will not use the index in the query?
Database index, how is the bottom layer realized, why use B-tree index?
The realization principle of Mysql master-slave synchronization?
How does MySQL use B+ trees?
Talk about database optimistic locking and pessimistic locking?
What NoSQL databases have you used? Which scenarios are applicable to MongoDB and Redis?
Describe the TCC service design for distributed transactions?
What is the difference between Redis and memcache? Why does Redis have an advantage over memcache?
Redis data structure
Mass data filtering, blacklist filtering a url.
Talk about AtomicInteger, why use CAS instead of synchronized?

Ant flower chanting three sides

When considering redis, did you consider capacity? What is the approximate amount of data?
The underlying implementation of Redis's list zset
The difference between solr and mongodb, why not use solr for storing data?
What are the sharing schemes of distributed session and what are the advantages and disadvantages
Talk about the implementation comparison of distributed locks and distributed global unique ID?
When cluster monitoring, which technical indicators should be focused on? How to optimize these indicators?
From tens of millions of data to billions of data, what technical challenges will it face? Your technical solution ideas?
How to implement database sub-database sub-table?
The complexity of the sorting algorithm, quick sort is implemented non-recursively.
What are the message middleware? The advantages and disadvantages between them?
How to solve the data consistency of database master-slave synchronization? What are the advantages and disadvantages of technical solutions?
What do you know about the implementation of distributed locks? What is the mainstream solution?

Ant flower chanting all around

Introduce the most helpful projects for your technical ability, focusing on architecture design ideas
Which aspect of distributed architecture design is more familiar
Introduce your practical performance optimization cases and your optimization ideas
Introduction project
Talk about a project you think you have learned the most, what technology was used, and where are the challenges
Various chat projects, from project architecture design to deployment process.
Have you learned a new technology recently?
What do you want to ask me?
The biggest setbacks encountered in the last two years, what have you learned from the setbacks?

HR face

Apart from work, how would you arrange your study time? What are the ways to improve technical capabilities?
What is the biggest challenge in your work and how did you overcome it?
What are your greatest strengths and greatest weaknesses?
Did the last company often work overtime? What do you think of the problem of overtime?
Have you ever made your own career plan, talk about it?

The above is the Ant Flower Advanced Java Interview Questions, the following is the most complete Ant Flower Advanced Java required test range and answers.

4 aspects of the latest ant team technology in March: thread pool + index + distributed lock + middleware + project, etc.

How to get answers

+ Focus point after praise

you can get answers to receive detailed way Oh!