Hard review two months, the line opened on three sides Ali Java Kong, and finally got the offer to do so

Foreword

Each programmer has a giant's dream, and the Internet giant is naturally bear the brunt of Alibaba 's most popular, today small to share a guy into Ali Baba (Alipay three sides) of the surface by!

This year due to the outbreak, the Internet industry as a whole are more severe, I am more fortunate accident recently received Alipay interview (three sides) has got the offer.

Originally Spring Festival, is a gold and three silver four season looking for a job, most people year after year are also ready for a finding that their favorite work in two months, but since the year 2020 some special, pneumonia wreak havoc on our work and life have caused a great impact. So, is not the case, we do not work, do not learn of it? In fact, precisely because of the spread of the virus during infection Now is the time, so we stay home to learn is no better. For Java programmers, use two to three months time, study hard, preparing for them, until the epidemic better, the beginning of the interview, you will not be timid.

I also continue to review at this time, was fortunate enough to be able to get the offer of Alipay!

Alipay side

1. Introduce myself.
2. Project participants core design which
3. ArrayList and LinkedList bottom
4. HashMap and thread-safe ConcurrentHashMap, as well as their strengths and weaknesses
5. How to implement a thread-safe Java
6. Synchronized and Lock which is better?
7. How to get HashMap in () method is implemented?
8. HashMap which can be used in the scene?
9. JVM, garbage collection, memory division, etc.
10. SQL optimization, commonly used index?
11. What question needs to be asked.

Alipay two faces

1. Did not introduce themselves, ask directly what Java development related projects done.
2. More familiar with what technology?
3. Multithreading state diagrams, state how transfer?
4. Deadlock, deadlock reasons
5. Page locks, optimistic locking, pessimistic locking?
6. How optimistic locking to ensure thread safety?
7. I used the thread pool, the corresponding benefits, how to use?
8. Two 10G files, which are some of the url, memory is only 1G, how to merge these two files, find the same url?
9. Designed thread pool size over 1000 concurrent threads, 10 machines, each machine 4-core.
10. Code Title: two ordered array, the array duplicate numbers, merge into an ordered array, removing duplicate numbers.
11. Talk about your strengths.

Alipay three sides

1. jvm performance tuning have done what
2. How do database performance tuning
3. Distributed Systems Principle: CAP, eventual consistency, power and other operations, etc.
4. High concurrency, our system is how to support a large number of requests
5. How the cluster synchronization session state
6. Common NOSQL, have done more?
7. What happens avalanches, as well as how to deal with?
8. Load balancing principle
9. Database transaction attribute
10. When communicating with colleagues, if you encounter a conflict how to solve?
11. Which would work in terms of lack?
12. There are questions to ask it?
13. Salary expectations?
14. Why leave your present company?

Interview Collection

The following interview documents I have put together a very long time, used to brush review interview questions are very appropriate, engineers and friends of those interested in learning the interview documents can focus on my private letter reply [information] to take the interview! Finishing is not easy, after reading this article that you have to help remember help forward a wave of Oh! ! ! !

java core document

Java part : Java foundation, collections, concurrency, multithreading, JVM, design patterns

Data structure algorithms: the Java algorithms, data structures

Open source framework part: the Spring, MyBatis, MVC, Netty, Tomcat

Distributed parts: architecture, Redis cache, Zookeeper, kafka, RabbitMQ, load balancing, etc.

Micro Services section: SpringBoot, SpringCloud, Dubbo, Docker

Combat series: spring family bucket combat document

     Spring Cloud micro combat service

brief introduction:

Book from the popular micro-services architecture concept, detailing SpringCloud solutions and basic components of several core elements of the micro-architecture for the service. For the introduction of the various components, the book mainly by way of example in conjunction with the source code to help readers better understand how to use these components and operating principles. Meanwhile, in the process of introduction, the author also includes some of the problems encountered in practice and Solutions, for readers as a reference in practice.

This book is suitable for all Java developers, especially for doing micro-architecture technology selection or service being implemented micro Services Architecture team access and reference.

 

 

Spring Micro combat service

This book is written for work JavalSpring developers who need practical advice and examples of how to build and micro-based applications and services implementation. Writing this book, I hope it is based on micro-kernel mode service in conjunction with the Spring Boot and Spring Cloud examples that demonstrate these patterns. Thus, the reader will find almost every chapter will discuss specific micro-service design patterns, usage patterns and examples of Spring Boot and Spring Cloud implementation.

 

 

Depth practice Spring Boot2.x

 

 

to sum up

For manufacturers interview, I want to emphasize that last point is that the mentality is really important, is the key to your decision to play in the interview process, if it can not function properly, most likely because of a small mistake and offer to pass up, so be sure to pay attention stand up. Another reminder that full review, is to eliminate the tension in your mental state of the key, but you fully review the natural course of the interview will have much more confidence.

Above all learning materials are available free of charge, we hope everyone can get their favorite offer!

How to Obtain

I also interviewed more than a document put together for a long time, used to brush review interview questions are very appropriate, engineers and friends of those interested in learning the interview documents can focus on my private letter reply [information] to take the interview! Finishing is not easy, after reading this article that you have to help remember help forward a wave of Oh! ! ! !

Access: thumbs small series of private letters + Watch interview [information] to obtain