Future Energy surface Test

Side topic:

TCP three times handshake, four times handshake process.

Agent mode in design mode, façade mode, adapter mode.

JVM class loading mechanism and process.

Valitile keyword.

The database has four isolation levels.

AOP in spring. Two ways to implement AOP in spring. The IOC explains.

An int array has a number with only one, and the other numbers have two, and write an algorithm to get a unique number.

Give you two stacks to implement the queue algorithm.

The principle of hashmap. Java8 the improvement of HashMap.

10,000 employees sorted by age, requiring complexity O (n)?

Later to be continued ...