oops concepts interview questions

IOS classic interview Summary-memory management, ios questions-memory managementI made a summary based on my own situation. The answer is my summary. If you have any bad answers, I hope to criticize, correct, and communicate. Thank you!Memory Management1. What is ARC?ARC is the automatic reference count of automatic reference counting, which is automatically added to retain/release during program compilatio

Spring, hibernate, struts interview questions, hibernatestruts 1. Is Action thread-safe? If there is no way to ensure the thread security of Action? If yes, explain the reasonNoDeclare local variables, or expand RequestProcessor to create an Action each time, or use scope = "prototype" in spring to manage 2. MVC: analyze how struts implements MVC.M: JavaBean or composed of EJB components or pojoC: Action to

are characterized by the inability to define variables, and all methods are abstract methods . abstract classes can have variables and do not enforce the need for abstract methods .Inheritance of class 16 and implementation of interfacesParsing: Class Inheriting the parent class implements the interface with the class, which is essentially the same. is to either extend or rewrite the parent class or interface as a template on this template. In practical programming, programmers often need to in

after the real object is called.Proxy mode,The proxy class and the proxy class implement the same interfaceAn instance of a proxy class in a proxy classBehavioral patterns: Focus on communication between objectsSuch as: Responsibility chain mode, iterator mode, command modeResponsibility chain ModelSimilar interceptors, etc.Command mode:Separates callers from Callee's behaviorInterpreter mode:Each syntax is an interpreter classIterator mode:Change the collection class's view traversal and add a