object oriented interview questions

From: http://www.leezao.cn/article.asp? Id = 465 This article focuses on several common C # And. Net classic interview questions, such as "differences between classes and structures in. Net", and "How many methods of passing values between ASP. NET pages ?", The answer is concise and concise, hoping to help readers who want to learn C # And. net. 　1. What is the difference between classes and structures i

executes , that is, initialize the call is lazy , Its implementation is basically the same as the lazy initialization properties we use in our usual way. I have not encountered the need to use this method in the actual project, in which the static variable is primarily set and used to ensure that certain conditions must be met before the instance is initialized . 7. Why a function call is called in other languages, Objective-c is sending a message to the

the Java 5 annotation.Spring's MVC Framework64. What is the Spring MVC framework?Spring provides a full-featured MVC framework for building Web applications. The spring framework can be easily fused with other MVC frameworks (such as struts), which uses the inversion of control (IOC) to separate the controller logic from the business object. It also allows the request parameters to be bound declaratively on the business

The php interview questions collected on the Internet are posted for you in the php Tutorial! I. Basic question 1. what is object-oriented? What are the main features? A face object is an elegant method to directly map objects and concepts in nature to the program world! Mai

First, let's talk about your understanding of object-oriented (that is, the understanding of the three major features, encapsulation, inheritance, and polymorphism) Encapsulation: Just like a box, you don't need to know what is in it, just know its usefulness. Inheritance: Like a parent-child relationship, a son is a father's inheritance. Polymorphism: for example, a father has multiple sons and each son h

PHP classic interview questions (Basic I) with answers. Interview and written examination are often indispensable for job hunting and recruitment. as a php programmer, more or less will have similar experiences. The following are the PHP interview questions I have collected

problem for us. After the online pool submits the callable task, a future object is returned, using which we can know the status of the callable task and get the result of the execution callable returned. The future provides a get () method so that we can wait for callable to end and get its execution results.6. What is Futuretask?Futuretask is a fundamental implementation of the future, and we can use it with executors to handle asynchronous tasks.

Php interview questions for medium-level programmers An interview for medium-level php programmers to check whether php developers have reached the medium level, including php and javascript. if you have any need, refer to it.If you are familiar with the following content, it indicates that you have achieved a moderate level of php Development. Generally

several ways to pass parameters. What method is used to implement multi-state parameter transfer, and what is the cause if no method is used;Pass value, pass pointer or reference6. Use a project to describe how to apply the design pattern.Design Patterns are more concerned with expansion and reuse, and these two aspects are often ignored.However, I do not recommend that you abuse the design pattern to make simple problems more complicated.7. Introduce your understanding of the design model. (Ma

are several ways to pass parameters. What method is used to implement multi-state parameter transfer, and what is the cause if no method is used;Pass value, pass pointer or reference6. Use a project to describe how to apply the design pattern.Design Patterns are more concerned with expansion and reuse, and these two aspects are often ignored.However, I do not recommend that you abuse the design pattern to make simple problems more complicated.7. Introduce your understanding of the design model.

several ways to pass parameters. What method is used to implement multi-state parameter transfer, and what is the cause if no method is used;Pass value, pass pointer or reference 6. Use a project to describe how to apply the design pattern.Design Patterns are more concerned with expansion and reuse, and these two aspects are often ignored.However, I do not recommend that you abuse the design pattern to make simple problems more complicated. 7. Introduce your understanding of the design model

. There are several ways to pass parameters. What method is used to implement multi-state parameter transfer, and what is the cause if no method is used;Pass value, pass pointer or reference 6. Use a project to describe how to apply the design pattern.Design Patterns are more concerned with expansion and reuse, and these two aspects are often ignored.However, I do not recommend that you abuse the design pattern to make simple problems more complicated. 7. Introduce your understanding of the desi

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 th

a daily sentence: Life is full of expectations, the dream of connecting the future! Java fresh or self-taught beginner's written interview topic summary, I hope that everyone has help, the topic from their own learning summary and teacher explanation, network resources, books and materials. Knock out everyone to see, every time to update the topic, I hope you can find a good job.Part I: The basic partThe underlying sections include: basic syntax, simi

Frontier Dream Workshop 2017-04-18 18:14 Most of the Java interview is divided into written and interview, the following issues are cutting-edge education small series according to the major IT enterprises interview asked the questions sorted out, such as the need for relevant learning materials can leave a mailbox, I

1: Object-oriented programming has many important features:Encapsulation, inheritance, polymorphism, and abstraction.2: What is a Java virtual machine? Why is Java called a "platform-agnostic programming language"?(1) A Java Virtual machine is a virtual machine process that can execute Java bytecode. The Java source file is compiled into a bytecode file that can be executed by the Java virtual machine.(2) J

reference, and then in some way the interface of an instance of an implementation class injected into the reference, so that the interface and the implementation of the specific class loosely coupled.The relationship between the container control program (through XML configuration), rather than being manipulated directly by the program code in the traditional implementation, (when referencing another class object in a class

object-oriented programming is not a full-scale silver bullet, it can not solve all the problems encountered by large software projects, but it proposed a more natural way to describe the software, to a certain extent, to solve the software crisis.6.1.1-oriented process programming for "top-down, gradual refinement"The simplest and most straightforward way to un

An index is a special file (an index on an InnoDB data table is an integral part of a tablespace) that contains reference pointers to all records in the data table. Summary of PHP Elementary classic interview questions (part 1) 17. differences between isset, empty, and is_null Isset determines whether the variable is defined or empty If a variable exists, true is returned. otherwise, false is returned. if t

separately, which belongs to the salvage function operation.Interview question: Please explain the difference between ArrayList and Vector.· These two classes are subclasses of the List interface;· The Vector class is provided at JDK 1.0, and the method of operation provided is synchronous, so it is thread-safeThe Operation class;· The ArrayList class is provided at JDK 1.2, and the method provided is asynchronous, so it belongs to the non-linearProcess-safe Operation classes.If later in develo