After years of cultivating the IT industry, we have discovered that for a programmer, being able to go to a first-line Internet company will have much impact on our future development.
Many people want to say, I also know this, but it is too difficult to enter a large factory, and the resume is basically ignored, let alone an interview invitation.
Let’s take a look at the Java programmers who require 25K for a Java interview. What questions do you ask him during the interview?
Share one, there are a lot of dry goods, including detailed explanations of netty, spring, thread, spring cloud, etc., as well as detailed study planning diagrams, interview questions collation, etc. I feel that the interview is very clear: to obtain interview information, just click : click Get it here!!! Password: CSDN
Basic skills
Object-oriented features
final, finally, finalize distinction
int Integer and any difference
overloading and rewriting the difference between
abstract classes and interfaces make any difference
to talk about the use of the reflected and implemented
talk custom annotations Scenarios and
HTTP request The difference between GET and POST The difference between
session and cookie
session Distributed processing
JDBC process
MVC design idea
The difference between equals and ==
set
The difference between List and Set The difference between
List and Map The difference between
Arraylist and LinkedList The difference between
ArrayList and Vector The difference between
HashMap and Hashtable The difference between
HashSet and HashMap The difference between
HashMap and ConcurrentHashMap
The working principle and code implementation of HashMap The working principle and code implementation of
ConcurrentHashMap
Thread
How to create a thread and
what is the difference between sleep(), join(), yield()
Talk about the principle of CountDownLatch
Talk about the principle of CyclicBarrier
Talk about the principle of Semaphore
Talk about the principle of Exchanger
Talk about the difference between CountDownLatch and CyclicBarrier
ThreadLocal principle analysis Talk
about thread pool Implementation principle
Several ways of thread pool
Thread life cycle
Lock mechanism
Talk about thread safety issues
volatile implementation principle
synchronize implementation principle
synchronized and lock the difference between
CAS optimistic lock
ABA problem
optimistic lock business scenarios and implementation methods
data storage
Precautions for the use of MySQL indexes
Talk about anti-pattern design
Talk about sub-database and sub-table design
Distributed dilemmas brought by sub-database and sub-table and countermeasures
Talk about SQL optimization methods
MySQL deadlock problems encountered
storage engine InnoDB and MyISAM
principles of database indexes
Why use B-tree
clustered index and non-clustered index difference
limit 20000 loads slowly how to solve
choose the right program distributed primary keys
to select the appropriate data storage scheme
ObjectId rule
chat MongoDB usage scenarios
inverted Index
talk about ElasticSearch usage scenarios
Cache usage
What types of
Redis have the internal structure of
Redis? Let’s talk about Redis usage scenarios.
Redis persistence mechanism.
How does Redis implement the persistent
Redis cluster solution and
why Redis is single-threaded.
Cache crashes.
Cache degradation
.
message queue
Use scenarios of message queues
Solutions for message retransmission compensation Solutions
for idempotence of
messages Solutions for accumulation of
messages How to implement message queues by yourself How
to ensure the orderliness of messages
Frame
Spring
What is the difference between BeanFactory and ApplicationContext
Spring Bean life cycle
Spring IOC How to implement
Spring AOP
Spring AOP implementation principles
Dynamic proxy (cglib and JDK)
Spring transaction implementation
Spring transaction underlying principles
How to customize annotations to achieve functions
Spring MVC operation process
Spring MVC Start-up process
Spring's singleton implementation principle
Which design patterns are used in the Spring framework?
Other Spring products (Srping Boot, Spring Cloud, Spring Secuirity, Spring Data, Spring AMQP, etc.)
Netty
Why choose Netty to
talk about the usage scenarios of Netty in business?
Native NIO has an epoll bug in JDK 1.7
What is the solution of TCP sticking/unpacking
TCP sticking/unpacking
Netty thread model
Talking about Netty's zero-copy
Netty internals Implementation process
Netty reconnection implementation
Microservices
Micro-service
end is how to do before and after the separation of
micro-services framework which
how you understand the RPC framework
to talk about the realization of the principle of RPC
to talk about the realization of the principle of Dubbo
how RESTful you understand
how to design a good API to talk about
how to understand the power of nature such as RESTful API
How to ensure the idempotence of the interface
Talk about the CAP theorem and the BASE theory
How to consider the problem of data consistency
Talk about the implementation of eventual consistency
What do you think
of the difference between
microservices and SOA How to split
services How to perform database management for
microservices Responding to the abnormal chain call of microservices
For fast tracking and locating problems
The security of microservices
distributed
Talk about the use of distributed scenarios in business
Session Distributed solutions
Distributed lock scenarios
Distribution is the realization of locks
Distributed transactions
Clustering and load balancing algorithms and implementations
Talk about sub-library and sub-table design,
sub-library and sub-table bring Distributed Dilemma and Countermeasures
safe question
Security elements and STRIDE threats
Prevent common web attacks
Server-side communication security attack and defense
HTTPS principle analysis
HTTPS downgrade attacks
Authorization and authentication
Role-based access control
Data-based access control
Performance optimization
What
are the performance indicators How to find performance bottlenecks
Common methods of performance tuning
Talk about how you perform performance tuning in your project
Engineering
Requirement analysis
How do you understand and split the requirement prototype
Talk about your understanding of functional requirements
Talk about your understanding of non-functional requirements
What interactions and improvements
do you propose for the product How do you understand user pain points
Designing ability
Talk about the UML diagrams
you have used in the project How do you consider componentization How do you consider serviceization
How do
you model the domain
How do you divide the domain boundary
Talk about the domain modeling in your project
Talk about the outline design
Design Patterns
Which design patterns are used in your project?
Talk about the analysis of the use of design patterns in commonly used open source frameworks.
Talk about your understanding of design principles.
The design concepts of 23
design patterns. The similarities and differences between the
design patterns , such as the difference between the strategy pattern and the state pattern. Design patterns The combination between, such as the strategy mode + simple factory mode,
the performance of the design mode, such as the singleton mode which is better.
Business engineering
Front and rear ends of your system separation is how to do
about your development process
you and your team how to communicate
how you code review
to talk about your understanding of technology and business
talk Exception you often encounter in the project
say Say you encountered the most difficult bug in the project, how to solve it.
Tell me about the most difficult bug you encountered in the project and how to solve it.
What do you think your project has shortcomings?
Have you encountered 100% CPU? Troubleshoot and solve
whether you have encountered memory OOM, how to troubleshoot and solve it,
talk about your practice of agile development,
talk about your practice of development, operation and maintenance, and
introduce one of the most valuable projects in your work, and in this process Role in
Soft power
Talk about your highlights.
Talk about what books
you are reading recently. Talk about the most meaningful technical books you
do.
Talk about your personal development direction.
Talk about what capabilities you think the server-side development engineer should have.
Talk about what you think of an architect, what does the architect do,
talk about the technical experts you understand