What is protocol independent servlet?
A protocol-independent servlet should subclass GenericServlet , while an HTTP servlet should subclass HttpServlet , which is itself a subclass of GenericServlet with added HTTP-specific functionality. Unlike a regular Java program, and just like an applet, a servlet does not have a main() method.
Is HTTP servlet protocol independent?
The main difference between GenericServlet and HttpServlet is that the GenericServlet is protocol independent and can be used with any protocol such as HTTP, SMTP, FTP, and, CGI while HttpServlet is protocol dependent and only used with HTTP protocol.
What are the two types of servlet?
There are two main servlet types, generic and HTTP:
- Generic servlets. Extend javax. servlet. GenericServlet. Are protocol independent.
- HTTP servlets. Extend javax. servlet. HttpServlet. Have built-in HTTP protocol support and are more useful in a Sun Java System Web Server environment.
Which class can handle any type of request means protocol independent?
GenericServlet class
GenericServlet class can handle any type of request so it is protocol-independent.
Which is protocol specific servlet?
Class GenericServlet. Defines a generic, protocol-independent servlet. GenericServlet implements the Servlet and ServletConfig interfaces. GenericServlet may be directly extended by a servlet, although it’s more common to extend a protocol-specific subclass such as HttpServlet .
Which class is protocol-independent in Servlet API?
GenericServlet
Package javax. servlet
Class Summary | |
---|---|
GenericServlet | Defines a generic, protocol-independent servlet. |
ServletContextAttributeEvent | This is the event class for notifications about changes to the attributes of the servlet context of a web application. |
What is servlet context in Java?
public interface ServletContext. Defines a set of methods that a servlet uses to communicate with its servlet container, for example, to get the MIME type of a file, dispatch requests, or write to a log file. There is one context per “web application” per Java Virtual Machine.
What are the protocols supported by HttpServlet?
The HttpServlet only supports HTTP and HTTPS protocol.
What are the methods in Servlet?
Methods of Servlet interface
Method | Description |
---|---|
public void destroy() | is invoked only once and indicates that servlet is being destroyed. |
public ServletConfig getServletConfig() | returns the object of ServletConfig. |
public String getServletInfo() | returns information about servlet such as writer, copyright, version etc. |
Which class can handle any type of request so that it is protocol independent * A GenericServlet B Httpservlet C both A & B D None of the above?
GenericServlet handle any type of request so that it is protocol-independent – Servlets.
What is servlet hierarchy generic Servlet and HTTP Servlet Servlet my servlet?
The Servlet interface is the root interface of the servlet class hierarchy. In addition to the Servlet interface, the GenericServlet class implements the ServletConfig interface of the Servlet API and the Serializable interface of the standard java.io. package.
What is the difference between a servlet and an HTTP protocol?
JSP supports HTTP protocol which mainly used for presentation. But a servlet can support any protocol like HTTP, FTP, SMTP etc. 26. What are all the ways for session tracking?
What is servlet interview questions?
Top 50 Servlet Interview Questions & Answers 1 What is a Servlet? A servlet is a Java technology and it is managed by a container called servlet engine. 2 Why servlet is mostly used? Servlets are mostly used because they are platform-independent Java classes and are compiled to platform-neutral byte code. 3 What is called servlet container?
What is servletconfig and servletcontext?
ServletConfig provides information about configuration of a servlet which is defined inside the web.xml file and it is a specific object for each servlet. ServletContext is an application specific object and it is shared by all servlet. It belongs to one application in one JVM. 31. What is Pure Servlet?
What is a servlet used for?
It is used to extend the capabilities of the server which hosts applications on a request-response programming model. Servlets provide component-based and a platform-independent method to build web-based applications without any performance limitations.