The key points of Java interview clearance summarize Java basics, collections, databases, spring frameworks, distributed, and microservices (preparing for the autumn move). Here, based on my past interview experience, I have compiled a list of some core knowledge to help you better review and review
Java core technologies.
This article is shared with friends who need to interview and brush questions, and I wish you all the best offers you want. This information mainly includes Java basics, data structures, jvm, multithreading, etc. Due to limited space, only a small part is shown below. For interview questions, friends who need the full version can click a link to jump to receive: link: just click! ! ! Password: CSDN
01 Basics
1.1 Basic skills
1. Object-oriented features
2. The difference between final, finally, finalize 3.
What is the difference between int and Integer
4. The difference between overloading and rewriting
5. What is the difference between abstract classes and interfaces
6. Talk about the use of reflection And implementation
7. Talk about the scenario and implementation of custom annotations 8.
The difference between the GET and POST methods of HTTP requests 9. The difference between
session and cookie
10. The distributed processing of
session 11. JDBC process
12. MVC design idea
1.2 collection
1.List and Set difference
2.List and Map distinguish
3.Arraylist and LinkedList difference
4.ArrayList and Vector difference
5.HashMap and Hashtable difference
6.HashSet and HashMap difference
7.HashMap and ConcurrentHashMap difference
8.HashMap of Working principle and code implementation
1.3 Thread
1. How to create a thread and its implementation
2. What is the difference between sleep(), join() and yield()
3. Talk about the principle of CountDownLatch
4. Talk about the principle of CyclicBarrier
5. Talk about the principle of Semaphore
6. Talk about the principle of Exchanger
7. Talk about the difference between CountDownLatch and CyclicBarrier
8. ThreadLocal principle analysis
9. Talk about the realization principle of
thread pool 10. Several ways of thread pool
1.4 Locking mechanism
1. Talk about thread safety issues
2. Volatile implementation principle
3. Synchronize implementation principle
4. The difference between
synchronized and lock 5. CAS optimistic lock and optimistic lock business scenarios and implementation methods
6. ABA problem
02 Core
2.1 Data storage
1. Precautions for the use of MySQL indexes
2. Talk about anti-pattern design
3. Talk about sub-database and sub-table design
4. Distributed dilemma and countermeasures brought by sub-database and sub-table
5. Talk about SQL Optimization
method
6. Deadlock problem encountered by MySQL 7. InnoDB and MyISAM storage engine
8. The principle of database index
9. Why use B-tree
10. The difference between clustered index and non-clustered index
11. Limit 20000 loading is very How to solve the slow
12. Choose a suitable distributed primary key scheme
13. Choose a suitable data storage scheme
14. ObjectId rules
15. Talk about MongoDB usage scenarios
16. Inverted index
2.2 Cache usage
1. What types of Redis 2. Redis
internal structure
3. Talk about Redis usage scenarios 4. Redis
persistence mechanism
5. How Redis achieves persistence
6. Redis cluster solution and implementation
7. Why Redis is single-threaded
8 .Cache crash
9. Cache downgrade
10. Reasonable use of cache
2.3 Message queue
1. Message queue usage scenarios
2. Message retransmission compensation solutions
3. Message idempotence solutions
4. Message accumulation solutions
5. How to implement message queues myself
6. How to ensure the order of messages Sex
03 Frame
3.1 Spring
1. What is the difference between BeanFactory and ApplicationContext 2. Spring
Bean life cycle
3. How
Spring IOC is implemented 4. Talk about Spring AOP
5. Spring AOP implementation principle
6. Dynamic proxy (cglib and JDK)
7. Spring transaction implementation
8. Spring transaction underlying principles
9. How to customize annotations to achieve functions
10. Spring MVC running process
11. Spring MVC startup process
12. Spring singleton implementation principle
13. Which design patterns are used in the Spring framework
14. Spring other products ( Srping Boot, Spring Cloud, Spring Secuirity, Spring Data, Spring AMQP, etc.)
3.2 Netty
1. Why choose Netty
2. Talk about the usage scenarios of Netty in business
3. Native NIO has epoll bug in JDK 1.7
4. What is TCP sticking/unpacking
5. TCP sticking /unpacking solution Method 6. Netty
threading model
7. Talk about the zero copy of Netty 8. Netty
internal execution process, Netty reconnection realization
04 Microservices
4.1 Microservices
1. How to separate front and back ends
2. What frameworks for microservices
3. How do you understand the RPC framework
4. Talk about the implementation principle of RPC
5. Talk about the implementation principle of Dubbo
6. How do you understand RESTful
7. Say Talk about how to design a good API
8. How to understand the idempotence of RESTful API
9. How to ensure the idempotence of the interface
10. Talk about CAP theorem and BASE theory
11. How to consider the problem of data consistency
12. Talk about eventual consistency the implementation
13. how do you see the micro-services
14. the difference between SOA services and micro
15. how to split the service
16. how micro database management services
17. how to deal with chained calls micro-services exception
18. for fast tracking and positioning problem
4.2 Distributed
1. Talk about the use of distributed scenarios in the business 2.
Session distributed solution
3. Distributed lock scenario
4. Distribution is the realization of the lock
5. Distributed transaction
6. Cluster and load balancing algorithm and implementation
7. Talk about sub-database and sub-table design
8. The distributed dilemma brought by sub-database and sub-table and countermeasures
4.3 Security issues
1. Security elements and STRIDE threats
2. Preventing common web attacks
3. Server communication security attack and defense
4. HTTPS principle analysis
5. HTTPS downgrade attacks
6. Authorization and authentication
7. Role-based access control
8. Data-based Access control
4.4 Performance optimization
1. What are the performance indicators
2. How to find performance bottlenecks
3. Common methods of performance tuning
4. Talk about how you perform performance tuning in your project
05 Engineering
5.1 Requirements analysis
1. How do you understand and split the requirement prototype
2. Talk about your understanding of functional requirements
3. Talk about your understanding of non-functional requirements
4. What interactions and improvements do you propose for the product
5.2 Design Ability
1. Tell me about the UML you used in the project Figure
2. How do you think about componentization
3. How do you think about service
4. How do
you model the domain 5. How do you divide the domain boundary
6. Tell me about you Domain modeling in the project
5.3 Design Patterns
1. Which design patterns are used in your project
2. Talk about the analysis of the use of design patterns in commonly used open source frameworks
3. Talk about your understanding of design principles
4.23 design patterns design concepts
5. Similarities and differences between design patterns , Such as the difference between strategy mode and state mode
6. Combination between design modes, such as the practice of strategy mode + simple factory mode
5.4 Business Engineering
1. How does the front-end and back-end separation in your system do?
2. Tell me about your development process
3. How do you communicate with
your team 4. How do you conduct code reviews
5. Tell me about your technology and business Understanding
6. Talk about the Exception
you often encounter in the project 7. Talk about the most difficult bug you encountered in the project, how to solve it
8. Talk about the most impressive difficulty you encountered in the project, how to solve it
9 .What do you think your project has shortcomings?
10. Have you ever encountered CPU 100%, how to troubleshoot and solve
11. Have you encountered memory OOM, how to troubleshoot and solve
12. Tell me about your practice of agile development
13. Talk about your practice of development, operation and maintenance.
14. Introduce one of the most valuable projects in your work and your role in this process
5.5 Soft power
1. Talk about your highlights
2. Talk about what books you are reading recently
3. Talk about the most meaningful technical books you think
4. What to do after work
5. Talk about your thinking about your personal development direction
6. Talk about what capabilities you think a server-side development engineer should have.
7. Talk about what kind of architect you think and what the architect does.
8. Talk about the technical experts you understand.
This article is shared with friends who need to interview and brush questions, and I wish you all the best offers you want. This information mainly includes Java basics, data structures, jvm, multithreading, etc. Due to limited space, only a small part is shown below. For interview questions, friends who need the full version can click a link to jump to receive: link: just click! ! ! Password: CSDN
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