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44 related questions found

What are the two main types of servlets?

There are two main servlet types, generic and HTTP:

• Generic servlet. Extends javax.servlets. Generic Servlet. is protocol independent. …
• HTTP servlet. Extends javax.servlets. HttpServlet. Has built-in HTTP protocol support, more useful in a Sun Java System Web Server environment.

What is the role of the servlet container?

servlet container Enables servlets to easily access HTTP request properties, such as its headers and parameters. When a servlet is invoked (eg when a servlet is specified by a URL), the Web server passes the HTTP request to the servlet container. The container in turn passes the request to the servlet.

What is the role of servlets?

A servlet is a Java programming language class that is Used to extend the functionality of servers hosting applications accessed through the request-response programming model. Although servlets can respond to any type of request, they are often used to extend Web server-hosted applications.

For reading data from client request Mcq?

explain: Servlet request Used to read data from client requests.

How do you perform dynamic interception of requests and responses?

How is dynamic interception of requests and responses to transform information accomplished? Description: Servlet has various components such as container, configuration, context, filter. Servlet filter Provides dynamic interception of requests and responses to transform information.

What is the life cycle of a servlet?

advertise.A servlet lifecycle can be defined as The entire process from creation to destruction. The following is the path followed by the servlet. A servlet is initialized by calling the init() method. The servlet calls the service() method to handle the client’s request.

Is a servlet a framework?

Servlet API is The foundation of almost all Java Web View technologies. Servlet provides the basic mechanism for writing Java classes for Web applications. Servlets can respond to HTTP requests, create cookies, and maintain sessions.

Why do we need servlets?

The main purpose of the Servlet specification is to Define a robust mechanism for sending content to clients as defined by the client/server model. Servlets are most commonly used to generate dynamic content on the Web and support HTTP natively.

What is the role of servlets?

A servlet is a Java program that runs on a Java-enabled web server or application server.they are used Process the request obtained from the web server, process the request, produce the response, and send the response back to the web server. Servlet attributes are as follows: Servlet works on the server side.

What is a servlet container and how does it work?

When a servlet request comes in, the server hands the request to the Web container. web container is Responsible for instantiating the servlet or creating a new thread to handle the request…the container creates multiple threads to handle multiple requests to a single servlet.

What is a servlet container for?

servlet container Invoke servlet methods and provide services that the servlet needs at execution timeA .servlet container is usually written in Java and is either part of the web server (if the web server is also written in Java) or associated with and used by the web server.

What are the 4 types of containers in Java?

container type

• Java EE Server: The runtime portion of a Java EE product. …
• Enterprise JavaBeans (EJB) container: Manages the execution of enterprise beans for Java EE applications. …
• Web Container: Manages the execution of JSP pages and servlet components of Java EE applications.

What is the difference between GenericServlet and HttpServlet?

-> GenericServlet is the superclass of the HttpServlet class. -> The main difference is that, HttpServlet is protocol dependent while GenericServlet is protocol independent. So GenericServlet can handle all types of protocols, but HttpServlet only handles HTTP specific protocols.

What is the JSP life cycle?

The JSP life cycle is defined as The process from creation to destruction. This is similar to the servlet life cycle, with additional steps required to compile JSPs into servlets.

How many kinds of servlets are there in general?

There are many interfaces and classes in the Servlet API, such as Servlet, GenericServletHttpServlet, ServletRequest, ServletResponse, etc.

What is destroy() method?

destroy() method is called The servlet container indicates to the servlet that the servlet is stopping service. This method is called only after all threads in the servlet’s service method have exited or the timeout period has elapsed.

When will init() and destroy() be called?

3.3. Initialization and destruction​​. Like applets, servlets can define init() and destroy() methods. A servlet’s init(ServletConfig) method is called by the server immediately after the server constructs an instance of the servlet.

What is the specific function of destroy method?

Use the destroy() method of the thread class Destroy a thread group and all its subgroups. The thread group must be empty, indicating that all threads in the thread group are stopped.

Is a servlet a framework?

As mentioned above, these frameworks are developed on top of Servlet/JSP. They are designed to avoid code duplication (DRY).framework based on Design Patterns – Generic reusable solutions to common problems.