oops concepts interview questions

environment. The Web container is more of a deal with HTTP-based requests. And the EJB container is not. It is more about dealing with databases and other services. But they are all interacting with the outside world to reduce the burden on the application. For example, the servlet does not care about the details of HTTP, directly referencing the environment variable session,request,response, EJB does not care about the database connection speed, various transaction control, directly by the con

can join, can not delete the original method, but cannot add the instance variableExtension: Extension can add instance variables and methods at the same time, and the method must be implemented, can be regarded as a private classProtocol: A protocol is a list of methods that are shared by multiple classes, and the methods listed in the protocol do not have a corresponding implementationInheritance: Not only can add instance variables and methods, but also can rewrite the method of the original

IOS interview questions: basic concepts of OC 1. What are classes and objects? Class is the abstraction of a group of things with the same features and functions Describes the features and behavior of an object. Class is the abstract object of an object is an instance of a class. 2. Define classes in OC, create objects, and use objects. Classes defined in OC

Summarize the Java Background Development interview questions and the java Background interview questions. Jing er has been summing up some interview questions recently, because he must take everything seriously. The same is true

Latest Android interview questions and Android interview questions Recently, I want to change my job for some reasons. I want to sort out some questions that I think are worth recording during the interview and give them a referen

. NET Common interview questions,. net questions Interview question 1 What are CTS, CLS, and CLR The Common Language Runtime Library (CLR) is an implementation of CLI, including the. NET runtime engine and a class library conforming to CLI.The general type System (CTS) includes the CLI specification submitted by Micros

Thinking about fork interview questions and fork interview questionsI. Reasons for the article It is still a convention to explain why the article came about. Good evening, you asked questions on the Internet and saw an interesting question. So I started my research and got this article.Ii. Enter the subject The

(Various companies interview original questions) online has done a set of CC ++ integrated test questions, also to test your level (2), cc integrated test questions I have read the last 10 questions and sent them to me. The following is a question, and I have some understan

English Original: Java Exception and Error interview Questions Answers In the Java Core Knowledge interview, you always encounter questions about handling exception and error. Exception processing is a very important aspect of Java application development and the key to writing robust and stable Java programs, which n

virtual.Attention:If you do not need a base class to manipulate derived classes and objects, you cannot define virtual functions, including virtual destructors, because this increases memory overhead.How C + + makes the function of the returned object not call the copy constructor"Explicit" keyword before copy constructor35. Orphan process and zombie processHttp://www.cnblogs.com/Anker/p/3271773.htmlWritten and interview

Development and running environments is the first step to become a Java programmer. By examining the basic aspects of Java programming, we can fully reflect the degree of understanding and proficiency of the interviewer in Java. In this chapter, I will explain the test points of the basic part of Java programming from multiple perspectives through real interview questions, so that the interviewer can quick

Below is a list of 125 basic C # interview questions. These interview questions are simple and straightforward, covering the most basic concepts of C #, mostly related to object-oriented concepts. So if you're preparing a C #

want to implement multiple inheritance, you can use protocol instead.Extended Interview Questions: because it involves multiple inheritance, if your resume contains other programming languages, you may be asked (Many interviewers will mention C ++ and Java in their resumes, at this time, the interview is very likely to ask about multiple

JQuery Interview Questions and AnswersJavaScript is the standard language for client-side scripting, and jQuery makes it easier to write JavaScript. You can achieve more with just a few lines of jquery code. It is one of the longest used JavaScript libraries, and there are few new projects that use native JavaScript without jquery. For you as a Java Web Developer, it means you'll find many of the jquery

may not have the same understanding of the same position. The definition on my side is the same as that on my previous blog. http://www.cnblogs.com/PurpleTide/archive/2012/05/16/2502547.html) This is just a question for a technical interview. It is not a complete interview, and this question is not mandatory. If the interviewer is not good at this aspect, he may not ask it at all. This is just a simple

Let's talk about some questions about the java programmer interview. This blog post is intended for recent graduates and java programmers who have been working for about two or three years. Why do I need to change jobs? This is a broad question. Everyone has an answer. For example: The company is not well-treated, The salary increase does not meet the expected requirements, Tired of the hard work of travel

[Switch] Top 50 Java thread interview questions, javatop No matter whether you are a new programmer or veteran, you must have encountered thread problems during the interview. An important feature of Java is its built-in support for concurrency, which makes Java popular among enterprises and programmers. Most well-received Java Development jobs require developer

below is a list of 125 basic C # interview questions. These interview questions are simple and straightforward, covering the most basic concepts of C #, mostly related to object-oriented concepts. So if you're preparing a C #

candidate, it is also difficult to meet the requirements, however, it is much easier to be a bystander, so it is very important to keep a clear mind during the interview process. I believe that many interviewers do not require you to answer questions. He just wants to fully understand you, therefore, the interview process should be clear-minded and express what

Next, let's continue to summarize the questions we encountered during the interview yesterday. First, let's take a non-technical question that we encountered during the interview as a refreshing use. The Quick answer should not exceed 5 minutes. Q0: How can I create a 5-litre water tank and a 3-litre water tank? Bytes -----------------------------------------