These interview questions and answers on Advanced Java will help you strengthen your technical skills Interview preparation PDF was generated at Monday 12th January, J2EE will be more friendly and efficiency in the code. variable. top 50 j2ee interview questions & answers - career guru99 - top 50 j2ee multiple choice questions jinzihao.info + java interview. Personal and Behavioral/Situational. ▫. Behaving right in an interview. ▫. Key Points. SECTION 2. Interview questions and answers on: Enterprise Java. ▫. J2EE .
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Advanced J2EE Interview Questions and Answers for Freshers or Experienced Pdf. This interview section questions contains a brief introduction to the Java. Top 50 J2EE interview questions & Answers. 1) What is J2EE? J2EE means Java 2 Enterprise Edition. The functionality of J2EE is developing multitier web-. J2EE means Java 2 Enterprise Edition. Top 50 J2EE interview questions & Answers. last updated February 9, .. Perfect! Download PDF.
Feel Free to add additional fields for the Quiz Taker to complete using the "Add Fields" options to the right. Java Server Pages. String Handling. Your email address will not be published. Similar considerations apply to the life cycle of all J2EE component types: Object Relational Mapping. Number of wrong answers.
The functionality of J2EE is developing multitier web-based applications. Java Servlet and Java Server Pages technology components are web components. Servlets are Java programming language that dynamically receives requests and makes responses.
JSP pages execute as servlets but allow a more natural approach to creating static content. JSF provides a set of reusable UI components, a standard for web applications. It automatically saves the form data to the server and populates the form date when display on the client side.
Hashtable is a collection Synchronized object. It does not allow duplicate values or null values. Hibernate is an open source object-relational mapping and query service. Hibernate has a more powerful association, inheritance, polymorphism, composition, and collections. It is a beautiful approach for persisting into the database using the Java objects. Hibernate also allows you to express queries using Java-based criteria. ORM stands for Object-Relational mapping. The objects in a Java class which is mapped into the tables of a relational database using the metadata that describes the mapping between the objects and the database.
It works by transforming the data from one representation to another. If the identifier is missing this method calls save. If the identifier exists, it will call update method. The load method may return a proxy instead of a real persistent instance get never returns a proxy.
So whenever it is necessary for an object, this mechanism is used to get objects without creating it. An object proxy is just a way to avoid retrieving an object until you need it. Hibernate 2 does not proxy objects by default. It also allows the user to express in native SQL. A thin client is a program interface to the application that does not have any operations like the query of databases, execute complex business rules, or connect to legacy applications.
These files are with the. For example, if you have: Struts help you to create an extensible development environment for your application, based on published standards and proven design patterns. Model in many applications represents the internal state of the system as a set of one or more JavaBeans. The Controller is focused on receiving requests from the client and producing the next phase of the user interface to an appropriate View component.
The primary component of the Controller in the framework is a servlet of class ActionServlet. This servlet is configured by defining a set of ActionMappings.
ActionErrors object that encapsulates any validation errors that have been found. If no errors are found, return null or an ActionErrors object with no recorded error messages. The default implementation attempts to forward to the HTTP version of this method. ActionForm is a Java bean that associates one or more ActionMappings.
A java bean become FormBean when extend org. ActionForm class. ActionForm object is automatically populated on the server side which data has been entered by the client from UI. ActionForm maintains the session state for a web application.
In action mapping, we specify action class for particular URL ie path and different target view ie forwards on to which request response will be forwarded. The ActionMapping represents the information that the ActionServlet knows about the mapping of a particular request to an instance of a particular Action class. The mapping is passed to the execute method of the Action class, enabling access to this information directly.
Model in many applications represent the internal state of the system as a set of one or more JavaBeans. Spring is a lightweight open source framework for the development of enterprise application that resolves the complexity of enterprise application development is also providing a cohesive framework for J2EE application development which is primarily based on IOC inversion of control or DI dependency injection design pattern.
Without new, the Factory methods are used to create objects for a class. Servlets is a server-side component that provides a powerful mechanism for developing server side programs.
Servlets is a server, as well as platform-independent and Servlets, are designed for various protocols. Most commonly used HTTP protocols. Servlets use the classes in the java packages javax. HttpServletRequest, javax.
HttpServletResponse, javax. All servlets must implement the Servlet interface, which defines life-cycle methods. The Servlet Interface must be implemented by all servlets. Your email address will not be published. Hashtable is a collection Synchronozed object.
It is stating that it allows null values is incorrect, Hash table neither excepts null keys nor null values. These are not precisely J2EE Qns. Perhaps you can consider renaming the title or add more JEE Qns. Latest Articles You are here: Compiled and shows output: XmlBeanFactory is one of the implementation of bean Factory org.
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Garbage Collection. Collection Framework.
String Handling. Exception Handling. IManages the execution of applets. Consists of a Web browser and Java Plugin running on the client together.
It manages the execution of enterprise beans for J2EE application. Enterprise beans and their container run on the J2EE server. The framework events of a J2EE component's existence. Each type of component has defining events that mark its transition into states in which it has varying availability for use. For example, servlet is created and has its init method called by its container before invocation of its service method by clients or other servlets that require its functionality.