Accumulation of interview questions

• Talk about your most impressive project , Or what optimization has been done .
• Your project mentioned distributed locks , How do you use distributed locks ? Common distributed transaction solutions
• How is idempotence of your interface guaranteed ？ Yours MySQL What is the architecture ？ Common index structures are ？ What kind of scenario does the hash table structure belong to ？
• Here you are. ab,ac,abc Field , How do you index ？ Whether the database isolation level is known ？ The default isolation level of your database is ？ Why choose it ？
• RR Isolation level implementation principle , How does it solve the problem of non repeatable reading ？ Your project uses RocketMQ Right ？ Do you know how to ensure that messages are not lost ？
• Whether the transaction message knows ？ Scene question ： Such as placing an order and emptying the shopping cart , How do you design ？ How to quickly judge whether a number is odd or even , Except right 2 What about the surplus .
• Spring The principle of declarative transactions ？ Which scenario transactions will fail ？ You are microservice architecture ？ If you design a system similar to Taobao , How do you divide micro Services ？
• How do you divide the database and table ？ Distributed ID How to generate ？ The common ancestor of all anomalies is ？ How many runtime exceptions are there ？