Today we share with you are the most frequently used interview questions in mainstream enterprises, and are also the latest answers rearranged after the Java version is upgraded, which will make the interviewer take many unnecessary detdetments. At the same time, each topic has done a detailed interview analysis documents, to ensure that readers at each stage can understand, at the same time, this part of the interview documents can also be provided for free to students who need to learn, there is a need to see the way to obtain the end of the article!
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MySQL
- Primary key Superkey Candidate key Foreign key
- Four features of database transactions and their implications
- What does a view do? Can a view change?
- Differences between DROP, DELETE, and TRUNCate
- How indexes work and their types
- Type of connection
- Database paradigm
- The idea of database optimization
- The difference between stored procedures and triggers
MySQL Performance optimization: 21 good things and Cheap things
MySQL55 questions and answers
Redis
- What are the benefits of using Redis?
- What advantages does Redis have over memcached?
- Redis Common performance problems and solutions
- MySQL has 2000W data, redis only 20W data, how to ensure that the data in Redis is hot data
- What are the differences between Memcache and Redis?
- What are the common performance issues with Redis? How to solve it?
- Redis is the most suitable scenario
- How about Redis synchronization?
- Have you used Redis clustering? How does clustering work?
- How does redis cluster ensure consistency?
The most complete Redis
Database interview question analysis:
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MongoDB
- What is MongoDB?
- What language is MongoDB written in?
- What are the advantages of MongoDB?
- What is a database?
- What is a set?
- What is a document?
- Comparison of MongoDB and relational database terms
- What is “Mongod”?
- What are the “Mongod” parameters?
- What is “mongo”?
- Which MongoDB command can switch databases?
- What is a non-relational database?
- What are the types of non-relational databases?
- Why MOngoDB?
- In what scenarios is MongoDB used?
- What do namespaces in MongoDB mean?
- What languages support MongoDB?
- How do I create a new database in MongoDB?
- How do I view a list of databases in MongoDB?
- What is sharding in MongoDB?
- How do I view connections using MongoDB?
- What is replication?
- How do I insert a document into a collection in MongoDB?
- How do YOU remove – a database in MongoDB?
- How do YOU create a collection in MongoDB?
- How do I view a created collection in MongoDB?
- How do I delete a collection in MongoDB?
- Why use profilers in MongoDB?
- Does MongoDB support primary and foreign key relationships?
- What data types does MongoDB support?
- Why use “Code “data type in MongoDB?
- Why use “Regular Expression” in MongoDB?
- Why use “Object ID” data type in MongoDB?
- How do I insert a document into a collection?
- What are the components of “ObjectID”?
- What is an index in MongoDb?
- How do I add indexes?
- What are the alternatives to MongoDB?
- How do I query documents in a collection?
- In what way can the output be formatted?
- How do I use “AND” OR” conditional loops to query documents in a collection?
- How do I update data in MongoDB?
- How do I delete a document?
- How do you sort in MongoDB?
- What is aggregation?
- What is a replica set in MongoDB?
- Mongodb storage features and internal principles?
Mongodb interview questions:
Zookeeper
- What is Zookeeper?
- What does ZooKeeper offer?
- Zookeeper file system
- Four types of ZooKeeper ZNodes
- Zookeeper notification mechanism
- What are the application scenarios of ZooKeeper?
- Zk naming service
- Zk configuration management service
- Cluster management for ZK
- Zk distributed lock
- Zk queue management
- Zk data replication
- How zK works
- How does ZK keep things in the same order
- Server status in the ZK cluster
- How does ZK elect its Leader?
- Zk synchronization process
- Distributed notification and coordination
- Zk session mechanism
ZooKeeper
Ngnix
- Please explain what Nginx is.
- Can you list some features of Nginx?
- List the differences between Nginx and Apache?
- Explain how Nginx handles HTTP requests.
- How can an undefined server name be used in Nginx to prevent requests from being processed?
- What are the advantages of using a “reverse proxy server”?
- List the best uses of the Nginx server.
- What are the Master and Worker processes on the Nginx server?
- Please explain how you can start Nginx through a different port than 80.
- Please explain if it is possible to replace Nginx error with error 502, 503?
- In Nginx, explain how to preserve double slashes in URLS.
- Please explain what ngx_ http_ upstream_ module does.
- Please explain what the C10K problem is and how it was solved later.
- State what the stub_ STATUS and sub_ filter directives do.
- Explain does Nginx support compression of requests upstream?
- Explain how to get the current time in Nginx?
- What is the purpose of interpreting -s with Nginx servers?
- Explain how to add modules to an Nginx server?
- How can multiple work processes in nginx listen on the same port? How to handle customer connection stampedes?
- How do hot updates to Nginx programs work?
Nginx interview question analysis
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Screenshots of some materials:
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