121 distributed interview questions and answers

Distributed transactions

A total of interview questions related to distributed transactions 17 Avenue , Continuous improvement later .

Tell me about your understanding of distributed systems CAP Theoretical understanding ,CAP What do they mean respectively ？

What is phase two submission ？

What is a three-stage submission ？

What is compensation business ？

What distributed transaction solutions do you know ？

Why can't the consistency and availability of a distributed system be satisfied at the same time ？

How do you understand data consistency ？ What are the models of data consistency ？

When you do system design , How to choose between strong consistency and weak consistency ？

In your project , How to design distributed transactions , To achieve ultimate consistency ？

Sagas What is the transaction model ？

Be familiar with distributed lock implementation schemes ？

What conditions should distributed locks have ?

Which distributed lock implementation scheme is better ？

You know the database binlog and redolog Do you ？ How to achieve consistency ？

How to design distributed idempotency ？

A simple and complete HTTP The steps of the request ？

How to improve the concurrent ability of the system ？

Distributed microservices

The micro service module collected a total of interview questions 42 Avenue , Basically, the coverage has been completed , Make progress and Optimization on these topics in the later stage .

Why Dubbo？

Dubbo Main application scenarios of ？

Dubbo Core functions ？

Dubbo Service registration and discovery process ？

Dubbo The service invocation process of ？

Dubbo Which protocols are supported , Application scenarios of each protocol 、 Advantages and disadvantages ？

Dubbo Which registries are there ？

Dubbo How to realize service governance ？

Dubbo The registry cluster of hangs up , How to consume normally ？

Dubbo What load balancing strategies does the cluster provide ？

Dubbo What are the cluster fault tolerance schemes of ？

Dubbo What serialization methods are supported ？

Say it once Dubbo Service request process ？

say something Dubbo working principle

The registry has gone up ,consumer Can we call provider？

How to realize the offline of dynamic sensing service ？

The service provider didn't hang up , But I can't see it in the registry ？

say something Dubbo Priority configuration

What's the point of load balancing ？

What are the common load balancing algorithms ？

What current limiting algorithms do you know ？

Tell me what a counter is （ Fixed window ） Algorithm

What is the sliding window algorithm

What is the leaky bucket algorithm

What is the token bucket algorithm

What is microservice ？

Spring Cloud What are the core components of ？

Spring Cloud What are the advantages ？

What is service fusing ？ What is service degradation ？

Eureka and Zookeeper, As a registry , What's the difference?

Spring Boot and Spring Cloud The difference between ？

What is? Hystrix？ How does it achieve fault tolerance ？

say something RPC Implementation principle of

Eureka What is the self-protection mechanism ?

What is? Ribbon？

What is? Feigin？ What are its advantages ？

Ribbon and Feign The difference between ？

Talk about how micro services communicate independently ？

Spring Cloud How to register services ?

say something Dubbo And Spring Cloud The difference between ？

Briefly describe what is Nginx, What advantages and functions does it have ？

Nginx How to deal with a HTTP What about the request ？

Distributed storage

common 10 Avenue

When designing high concurrency systems , Why do we need to divide the database and the table ？

Which database and table middleware have been used ？

What are the advantages and disadvantages of different sub database and sub table middleware ？

How to split the database vertically or horizontally ？

If you want to design a database and table scheme that can dynamically expand and shrink capacity , How to do ？

After the database is divided into databases and tables , How to deal with design primary key generator ？

What are the differences between different ways of generating primary keys ？

Distributed ID There are several schemes for generating ？

What are the third-party frameworks for sub database and sub table ？

Distributed message queuing

common 27 Avenue

Why use message queuing ？

What are the disadvantages of message queuing ？

How to ensure high availability of message queues ？

How to ensure that messages are not consumed repeatedly ？

How to ensure that consumption is idempotent ？

How to ensure the reliable transmission of messages ？

What if the message is lost during transmission ？

How to ensure the order of messages ？

How to solve the delay problem of message queue ？

How to solve the expiration problem of message queue ？

What to do when the message queue is full ？

There are millions of messages that keep piling up for hours , How to solve ？

If you write a message queue , How to design architecture ？

With Kafka For example , You can ask the following questions ：

Describe the Kafka Design framework ？

Kafka、ActiveMQ、RabbitMQ、RocketMQ What is the difference between ？

Kafka Whether there may be repeated consumption on the consumer side ？

Kafka Why partition ？

Kafka How to ensure data consistency ？

Kafka in ISR、OSR、AR What is it? ？

Kafka Under what circumstances will a message be lost ？

Kafka The message is to adopt Pull Pattern , still Push Pattern ？

Kafka How and ZooKeeper Interact ？

Kafka How to achieve high throughput ？

If it is RocketMQ, Many problems are similar , We can start from the following questions ：

RocketMQ and ActiveMQ What are the differences ？

Why? RocketMQ No messages will be lost ？

RocketMQ What are the applications of transaction messages ？

RocketMQ How to ensure the high availability of the system ？

Distributed cache

common 25 Avenue

Cache avalanche 、 How to understand cache penetration ？

How to avoid related problems in business ？

How to ensure the consistency between database and cache ？

How to warm up the cache ？

How cache clusters fail ？

What are the applications of consistent hashing ？

How cache monitors and optimizes hotspots key？

Redis What are the data structures ？

Redis and Memcached What are the differences ？

Single threaded Redis How to achieve high-performance reading and writing ？

Redis Do you support transactions ？

Redis How to realize the pipeline of ？

Redis What are the failure strategies ？

Redis How to realize master-slave replication ？

Redis Of Sentinel What are the applications ？

Redis There are several ways of clustering ？

Redis and memcached What's the difference ？

Redis How to implement the cluster mode of ？

Redis Of key How to address ？

Redis How to realize the persistence bottom layer of ？

Redis What are the expiration policies ？

What to do if the cache is inconsistent with the database ？

Redis Common performance problems and solutions ？

Use Redis How to implement asynchronous queues ？

Redis How to implement delay queue ?

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