Spring 2019 Ali trick interview questions + java programmers Advanced Learning Path Reference

BAT cattle more and more ordinary people, although they are not everyone can achieve this level of technology it is looking at, but after all, high platform, so the eyes become wide; the code more stringent requirements, so programmers will be common forced to become better; many people around cattle, ordinary programmers will also be affected, upgrade faster.

Just, Xiao Bian today to see an article, Ali is about to face questions, but also to share for everyone to see themselves from the Ali [into] there is much difference.

Java multi-threading

1. Principle thread pool, why should create a thread pool?
2. Thread of the life cycle, when there will be zombie processes;
3. What achieve thread safety, how to achieve thread-safe;
4. Several core parameters which have to create a thread pool? How to properly configure the size of the thread pool?
5. synchronized, volatile difference, the synchronized lock granularity, deadlock scenario simulation, and visibility of atoms;

JVM-related

1. JVM memory model, GC mechanisms and principles; GC What two points; when it will trigger the Full GC?
2. There are several JVM in classloader, why are there more?
3. What is a parent to delegate mechanism? Introduce some of the operational processes, the benefits of delegating parental model; (this I really do not ...)
4. Under what circumstances we need to destroy parent delegation model;
5. Common JVM tuning methods are there? Which can be adjusted to the specific parameters, tune into what values?
6. JVM virtual machine memory division, class loader, garbage collection algorithm, the garbage collector, class is how to parse the file structure;

Java Extensions

1. The principle and application scenarios red-black tree;
2. NIO What is that? What applies to the scene?
3. Java9 improved than what Java8;
4. What internal data structure of the HashMap? The bottom layer is how to achieve?
5. Use and talk about the realization of reflection, reflection is not very slow, if we want to avoid in the project using reflection;
6. Scenarios and annotations to talk about custom;
7. List and Map distinction, Arraylist and differences between LinkedList, ArrayList and the Vector difference;

Spring

1. Spring AOP implementation principle and scenarios; (application scenario is very important)
2. Spring bean scope and life cycle;
3. Spring Boot done what improvements over Spring? Spring 5 Spring4 than what had been done to improve; (shame Yeah, we still use Spring4, high version did not care about)
4. What Spring IOC that? What advantage is that?
5. SpringMVC, dynamic agency, reflection, AOP principle, the transaction isolation level;

Middleware

1. Dubbo complete a call to link introduction;
2. Dubbo supports several load balancing strategy?
3. Dubbo Provider service providers to control the concurrent request limit, specifically how to do?
4. Dubbo start time supports several configurations?
5. Learn several messaging middleware product? Introduce the advantages and disadvantages of each product;
6. How to ensure the consistency of messaging middleware and retry mechanism of how the message is the message?
7. Spring Cloud fuse mechanism introduced;
8. Spring Cloud contrast of Dubbo, under what scenario the use of Spring Cloud?

Articles database

1. Lock mechanism introduced: line lock, table lock, exclusive lock, shared lock;
2. The business scenario and implementation of optimistic locking;
3. Services introduced, distributed understand things, common solutions which, what two-phase commit, the three-phase commit;
4. MySQL binlog record includes three modes of fashion? What are the advantages and disadvantages of each model is?
5. MySQL locking, pessimistic locking, optimistic locking, an exclusive lock, shared lock table-level locking, row-level locking;
6. The principle of the distributed transaction Stage 2 submission, blocking synchronous asynchronous non-blocking;
7. Database transaction isolation level, MySQL default isolation level, Spring how affairs,
8. How to achieve JDBC transactions, nested transactions realized, distributed transaction implementation;
9. Entire SQL parsing, execution principle, SQL turn row column;

Redis

1. Redis Why so fast? redis multithreading have what issues?
2. What kinds of data structures Redis support;
3. Redis jumping problem table;
4. Redis Redis single-process single-threaded how can high concurrency?
5. How to use Redis Redis implement a distributed lock?
6. How Redis distributed atomic lock operations, internal Redis is implemented?

Learn how to break through, to grow into a good architect, architects need advanced technical knowledge to grasp what?

Currently architects need both the overall and the need to control the local bottleneck and give insight into the solutions based on the specific business scenarios, identify and assess the needs of the system, given the development of norms, build core architecture system implementation, and to clarify the technical details, clearing the main difficulties .

Throughout the software development process plays an important role in the development process and with the advancement of its duties or concerns constantly changing.

• In the requirements phase , the software architect is responsible for understanding and managing non-functional system requirements.
• In the software design phase , responsible for the design of the entire software architecture, key components, interfaces, and development policies.
• In the coding phase , then as a consultant architect and designer details of the code writers. With the software start testing, integration and delivery, integration and testing support will be the focus of a software architect;
• * At the beginning of software maintenance , software architects began for the next version of the product whether to add new functional modules to make decisions.

Core competence is the ability to connect all the architects, the architect Slogan should be "connected to create value."

Java Architect large Internet came into practical technical courses come

After learning can help us to understand the following knowledge and skills, we enhance their core competitiveness. And the value of the company (enterprise).

All courses are explained in detail by the architect BAT manufacturers more than ten years, to teach you

• Step by step how to architect;
• How to break the bottleneck;
• How out of confusion;
• A few years into the future of the industry.
  Syllabus knowledge points to explain roughly as shown below
  

After learning that we can reap the

This concludes the paper like a friend little praise and attention, thanks!