Baidu side experience

The time is about 1:30 pm and lasts for 20 minutes.
Question:
The java version currently in use
How do the two items in the resume achieve
the isolation level of the database
java multithreading
java virtual machine
spring what is Ioc and aop
locked threads calling sleep () Will the lock be released after the method
? What method can be called to release the lock if the requested resource cannot be satisfied by the thread with the lock.
Finally, let me ask a question.
Springboot is still a relatively mainstream technology.
Now the java version at work is mainly 1.7 and 1.8. The
java virtual machine is very important.
Summary: Also due to the reason that I just returned from the holiday, many problems will come before and now they won’t. Java Virtual machines are still very important.
Finally: feeling cold on one side.