Ali was wildly asked by the interviewer on three sides. Redis dared not write 'proficient' on his resume anymore

Preface

The main reason why the interview was suspended was the two words on the resume “ Master ”, Bloggers think Redis I have mastered it thoroughly , So self righteous wrote on the resume “ Master Redis” A few words , As a result, I was asked to explode on three sides ！

Now the interview will not only catch a knowledge point, but also constantly ask in-depth questions , Many small and medium-sized factories have followed suit , therefore “ Master ” Don't write these two words casually on your resume , Unless you are sure ！

The following interview questions are arranged for you to see , See how much you can answer ：

• How caching is used in projects ？ Why cache ？ What are the consequences of improper use of cache ？

• Redis  and  memcached  What's the difference? ？Redis  What is the thread model of ？ Why?  Redis  Single thread can support high concurrency ？

• Redis  What are the data types ？ Which scenarios are suitable for use ？

• Redis  What are the expiration policies of ？ What are the memory elimination mechanisms ？ Write it by hand  LRU  Code implementation ？

• How to ensure  Redis  High concurrency and availability of ？Redis  Can you introduce the principle of master-slave replication of ？Redis  Can you introduce the sentinel principle of ？

• Redis  How to persist ？ What are the advantages and disadvantages of different persistence mechanisms ？ How to realize the specific bottom layer of persistence mechanism ？

• Redis  Can you explain the working principle of cluster mode ？ In cluster mode ,Redis  Of  key  How to address ？ What algorithms do distributed addressing have ？ Understanding consistency  hash  Algorithm ？

• Understand what is  Redis  The avalanche of 、 Penetration and breakdown ？Redis  What happens after the crash ？ How should the system deal with this situation ？ How to deal with it  Redis  The penetration ？

• How to ensure the double write consistency between cache and database ？

• Redis  What is the concurrent competition problem of ？ How to solve this problem ？ understand  Redis  The transaction  CAS  The plan ？

• In production environment  Redis  How it was deployed ？

The interview cooling off period of large factories is generally about half a year , So I haven't had an interview , If you haven't been fished by other parts, you can only wait for half a year to face ！

In order to be able to “ Master Redis” Enter Ali , The blogger chose to fight again , Simply put, put the interview recording into notes , According to the interview notes, solve the problems encountered in the interview process ！

Here's the organized Redis Interview notes （ With answers ）, The content is filled in and classified , Friends in need  

Click here to get the screenshot of this article ！

In addition to sorting out the interview notes , Bloggers have been watching some of them these days Redis Information , Here are two materials that make me feel very nice, Friends in need can get it together with the notes above ！

Redis Deep Adventure ： Core principles and application practices

application 、 principle 、 colony 、 The source code has been mentioned , There are also some additional extensions , You can see from the catalogue that the author is a very interesting person , Show you the hard to understand knowledge vividly

Catalog

Content

Limited to platform space , Only part of the content can be shown in the form of screenshots , Let's make do with it first , Friends in need help forward the article , Pay attention to private message reply 【

Study

】 You can get ！

The above is the general content of this information , Now share the second ~

Redis 5  Design and source analysis

From the perspective of the underlying source code , Yes Redis Data structure and persistence of 、 Master slave copy 、 The implementation principles of sentry and cluster are analyzed in detail , illustrated .

Limited to platform space , It can only be shown here , You need the above two Redis Information + Blogger Redis A friend of the interview notes  

Click here to get the screenshot of this article ！

Last

Learning is never overnight , The blogger found two extra Redis The purpose of learning materials is to make yourself understand Redis Have a thorough basis ！

If you just sort out and record the interview questions , I think it won't take long to forget . In this era of continuous learning , How long can you last ？