Therefore, the compiler will throw an error. . How to forward a request to another source. It supports dynamic loading of classes. This will be very helpful for the technical people to prepare for the interview very quickly.Next
Method overriding is also known as dynamic polymorphism. Multiple inheritance C++ supports multiple inheritance. These objects are called implicit objects because they are automatically instantiated. There are various advantages of defining packages in Java. Some of the popular tag libraries are Apache display tag library and String tag library. It is not executed if existing object was found and only if a new object was instantiated. Or, does it cause a StackOverflowException? In the method call, the integer is passed.Next
The PrintWriter uses the character encoding returned by getCharacterEncoding. ServletContext is an application specific object and it is shared by all servlet. Ans: yes, The constructor implicitly returns the current instance of the class You can't use an explicit return type with the constructor. Spring is based on an inversion of control or dependency injection design patterns. Hardware C++ is nearer to hardware. There are the following differences between this and super keyword.Next
They are document centric, whereas servlets are programs. The second tag content of file is textually embedded having similar directive. What is the difference between creating String as new and literal? An interface is a description of a set of methods that conforming implementing classes must have. In Java, there are four access specifiers given below. Only public and abstract modifiers are allowed for methods in interfaces. Java doesn't support the goto statement. The isScriptingEnabled attribute determines if scripting elements are allowed for use.Next
Inheritance Tree C++ creates a new inheritance tree always. Q 10 What the identified advantages are of hibernate? How do you prevent a method from being overridden? You can write and compile program in one Operating system and run in other operating system. Hi how to used doget and dopost method in jsp. Yes, there can be an abstract class without abstract methods. When the object not available in either cache or database, get returns null. For example, if a stack overflow occurs, an error will arise.Next
If it is override, the compiler gives an error, but the other 2 lifecycles can be easily override. This action helps in insertion of a specific object in the browser or embed the element needed to specify the running of applet using Java plugin. An abstract class can have any visibility: public, private, protected. If the response's character encoding has not been specified then it does default character encoding. If the attribute is set to false, then expressions are not evaluated but rather treated as static text. The request goes out of scope, thus, it cannot be accessed. Can we refresh servlet in client and server side automatically? Today, however, servlet containers still call only no-arg constructor.
The object is required to call the instance methods. Holding the reference of a class within some other class is known as composition. A method is used to expose the behavior of an object. Here, Runtime polymorphism is achieved between class Base and Derived. We can execute the Java program on every machine. Ans When you invoke a forward request, the request is sent to another resource on the server, without the client being informed that a different resource is going to process the request.Next
Interfaces are slow as it requires extra indirection to find corresponding method in the actual class. Its implementation has been provided by Oracle and other companies. When init method of servlet gets called? Can we have try without catch block in java? This method can be used to write clean code before object is collected by Garbage Collector. So you have nothing to do with service method but you override either doGet or doPost depending on what type of request you receive from the client. A static method can't be overridden in Java. What is called Servlet mapping? Refer our for an extra edge in your interview.Next
How will you ensure pre initialization of Servlet? You can refer for more details What is CountDownLatch in java? Calling doGet from doPost and vice versa won't create deadlock. When an object contains the other object, if the contained object cannot exist without the existence of container object, then it is called composition. The Java Runtime Environment is a set of software tools which are used for developing Java applications. The application, config, session, and out objects are derived by accessing attributes of this object. A collection of custom tags is called a Tag Library. Q 22 Discuss the benefit of Spring Framework? Yes, we can declare static variables and methods in an abstract method. Servlets are mostly used because they are platform-independent Java classes and are compiled to platform-neutral byte code.Next
JavaBeans and taglib fundamentals were introduced for reusability. It is an error processing page. Ans In hibernate this method is used to stores an object into the database. Chaining is one of the methods where out of one servlet is given to the second servlet. Comparison Index C++ Java Platform-independent C++ is platform-dependent. The Java component can be either an Applet or a JavaBean.