java web developer interview questions

Multithreading and concurrency issues are among the questions that interviewers prefer to ask in a Java technology interview. Here, the most important questions are listed from the interview point of view, but you should still have a solid grasp of the basics of

Controller: When the user clicks the Submit button in the Web page, the controller accepts the request and invokes the appropriate model to process the request. The corresponding view is then called according to the result of the processing to display the results of the processing. MVC process: First the controller accepts the user's request, invokes the corresponding model for business processing, and returns the data to the controller. The

COSCO Java interview question zzz COSCO Java interview questions Java training materialsI. Java language1. Three basic features of object-oriented2. Concepts and differences between met

Do not write any scopes (that is, access rights) represent friendlyPublic, the largest, the largest scope, within the class, the same package, descendants class, other package can be accessedProtected protection, can be accessed within the class, the same package, descendant classes, but other package cannot accessFriendly friendly, within the class, the same package can be accessed, descendant class, other package cannot accessPrivate, minimal permissions, minimal scope, access within the class

adapter pattern? Ø database How are you usually optimized, what other tools are used to optimize no, how to use the Ø Now there is a lot of tables to correlate the query SQL, the child table data is very much, then you only from the SQL point of view of the SQL statement optimization, do not need to consider the index, predicate Ø you don't have a Java project, do you? Ø your major is to control the direction, why do the current direction O you have

Translation Links: http://www.codeceo.com/article/java-hashmap-value-sort.htmlThe English version: How to Sort HashMap Based on the Values in JavaTranslation Author: Code Rural network – Xiao Feng HashMap in Java is a data structure for storing "key" and "value" information pairs. Unlike array, ArrayList, and linkedlists, it does not maintain the order in which elements are inserted. Therefore, sorting hash

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

The Java Collection framework is the foundation of the Java programming language and is an important knowledge point in the Java interview. Here, I've listed some important questions and answers about the Java collection.In additi

The Java Collection framework is the foundation of the Java programming language and is an important knowledge point in the Java interview. Here, I've listed some important questions and answers about the Java collection.In additi

or a group of people who are difficult to deal with, try to tolerate it, at least in the first half of the project group. Because on the one hand all kinds of people have, we have to learn to deal with different people, on the other hand, if you are in a project for less than six months, the subsequent interviewer will most likely consider your personal problem.I write this article according to the experience of the interviewer, and these are from the Java