Article directory
- written in front
- written examination
- one side
-
- Talk about TCP's three-way handshake and four-way wave
- The difference between TCP and UDP
- How to make UDP reliable
- Write a sql query statement, for example, I want to query the user with id=3.
- Talk about the characteristics of InnoDB
- Talk about mysql index
- How to create index?
- Have you ever drawn a flow chart? We have to draw these pictures frequently in our work.
- Algorithm: Given you a string s and an integer m, please find the longest substring in s, and require that each character in the substring appears no less than m times. Returns the length of this substring.
- two sides
written in front
After the interview, Qi Anxin felt very ordinary. I was ridiculed by the interviewer (
don’t go to Qi’anxin if you’re not safe..
written examination
slightly
one side
The project asks more
Talk about TCP's three-way handshake and four-way wave
The difference between TCP and UDP
TCP is a reliable transmission, connection-oriented, and stream-based, which takes up a lot of resources and is inefficient.
UDP is best-effort delivery, based on connectionless and message-based, UDP occupies less system resources and has high efficiency.
How to make UDP reliable
Yes, we only need to imitate the reliable transmission mechanism of TCP. For example, set the ACK confirmation mechanism. Once the ACK of the previous message is not received or received three times, we will immediately retransmit the lost message. Another example is setting a sliding window to ensure the security of data transmission, etc...
Write a sql query statement, for example, I want to query the user with id=3.
Talk about the characteristics of InnoDB
Talk about mysql index
How to create index?
Have you ever drawn a flow chart? We have to draw these pictures frequently in our work.
Algorithm: Given you a string s and an integer m, please find the longest substring in s, and require that each character in the substring appears no less than m times. Returns the length of this substring.
two sides
There was a probability theory problem that got stuck and was ridiculed by the interviewer.
"Only you are still in xx school, xx major?"
I don't want to write anymore, don't go to Qi Anxin, Wisdom Company.