Preface
As we all know, the more lucrative the offer, the later it will be reviewed, so I will share the summary of my back-end JAVA development autumn tricks now that I got two million offers.
Personal background: Bachelor degree in the middle and lower reaches of 985, no internship at a big factory (small factories), no competition, no related papers, half-disciplinary class (transfer to computer).
Offer: Tencent, Baidu, Byte, Meituan, Lao Tie, Shopee, VIVO, Bank of Communications, China Merchants Bank, Bank of China The
annual salary adds up to more than two million (forgive me for the title party)
One or two sides of flying book:
- Personal experience
- project
- Know NIO
- The difference between IO model select and epoll
- The difference between interceptor, listener and filter
- RESTful and SOAP
- get / post difference
- How to cross domain
- csrf prevention, http/dns hijacking
- How does rabbititmp solve the problem of missed and frequent posts? How to make persistence?
- The difference between redis and mysql
- How to improve performance when mysql design table
- Symmetric encryption and asymmetric encryption, RSA specifically
- The difference between DES and AES
- What is an HTTPS certificate? Encrypted content?
- Can the certificate be forged? Can man-in-the-middle attacks be prevented?
- How does tcp calculate time, RTT and RTO?
- How big is the UDP pseudo header, what is it, and what is it useful for?
- Common congestion control algorithms (BBR, RENO, BIC-tcp)
- Database paradigm? BCNF? Fourth and fifth paradigm?
- What happens when the index fails?
- How to design the index?
- How does the DBA design an index without knowing the business?
- limit optimization
- The maximum number of fields in the joint index
- Transaction isolation level of the database
- Talk about mvcc mechanism
- linux command Kill principle
- tcp exception handling, when is RST,
- When will there be PSH URG packages
- Reptile countermeasures
- What to do if team members conflict
- How to convince the product
- How to convince the test
- What to do if you disagree with the team leader
- Do the problem
Flying books on three sides:
- Project related
- Http1.1 features and disadvantages
- http2.0 features, disadvantages
- http3.0 features, disadvantages
- QUIC features, disadvantages
- Let’s talk about the perspective of blocking tcp http
- How fast is BBR, how is it implemented, and what is the difference from the previous one
- What are the tcp options
- How big is the tcp header
- The difference between fragmentation and segmentation
- The difference between half open and half closed tcp
- The meaning of udp
- How to thread communication
- Multi-thread creation, how to exit the thread, exit the process
- Thread pool parameters
- The state of the thread pool
- How to prevent deadlock
- What to do if there is a deadlock
- How does the banker achieve
- Process scheduling CFS
- Clock scheduling algorithm
- Slow query optimization
- ThreadLocal scene application, is it useful in spring
- JVM architecture, garbage collection
- How to design a log system
- What is the disk scheduling algorithm
- linux file system architecture
- What information does inode have
- How to find files in LINUX
- How does Linux see ports,
- See what the load average of the process of tw status is, how to see, how to analyze
- How to do io detection in linux
- What is the difference between different Linux distributions
- How do you think linux is better than win
- Endian, what is network endian
- What to do if you need to lead the project
- How to design test cases
- How to summarize the work
- Advantages Disadvantages
- hobby
- Do the problem
One or two aspects of technology:
-
tcp, http, https and other common problems
-
The per capita project kills, the interviewer is impatient
-
How does Innodb solve phantom reading
-
redis cluster
-
Why is 16384?
-
netty model
-
Netty advantages
-
How to solve the nginx whale group
-
rabbitmq build
-
What about dns deception? arp cheating? CSRF attack? xss attack? syn flood attack? solution
-
Spring Boot startup process and life cycle
-
https://blog.csdn.net/u011277123/article/details/104476683
-
How to implement spring transactions
-
ipc which is faster
-
What are the functions of B tree and b+ tree respectively
-
JVM memory model
-
GC collector JVM tuning parameter configuration
-
Talk about various locks in Java, CAS mechanism
-
Is volatile ever useful? The underlying implementation
-
What log does the database have?
-
The role of mvcc
-
The realization principle of transaction
-
Do the problem
Three sides:
- Talk project
- ipc which is faster
- B tree and b+ tree are introduced separately
- Various locks in Java
- CASE
- volatile
- Do the problem
