Who is responsible for instantiating a servlet instance?
Last Update: April 20, 2022
This is a question our experts keep getting from time to time. Now, we have got the complete detailed explanation and answer for everyone, who is interested!Asked by: Aubrey Koch
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4) Who is responsible to create the object of servlet? The web container or servlet container.
Who creates servlet instance?
2) Servlet instance is created
The web container creates the instance of a servlet after loading the servlet class. The servlet instance is created only once in the servlet life cycle.
How a new instance of the servlet is instantiated?
Instantiation - a servlet is instantiated when the container receives the first request mapped to the servlet (unless the servlet is configured to load on startup with the <load-on-startup> element in web.
How servlet instance is removed from the service?
The servlet is initialized by calling the init() method. The servlet calls service() method to process a client's request. The servlet is terminated by calling the destroy() method. Finally, servlet is garbage collected by the garbage collector of the JVM.
How a GET request is processed by a servlet?
When a request comes in for a servlet, 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. Its the job of Web Container to get the request and response to the servlet.
What is Servlet Loading?, Servlet instantiation & Servlet Initialisation?| Servlet FAQs | Mr.Nataraj
What replaced servlets?
- Common Gateway Interface (CGI) It is the most typical server-side solution. ...
- Proprietary API. Many proprietary web servers have built-in support for server-side programming. ...
- Active Server Pages (ASP) ...
What is servlet content?
Content Type is also known as MIME Type. MIME stand for Multipurpose internet Mail Extension. It is a HTTP header that provides the description about what are you sending to the browser (like send image, text, video etc.).
Which one of the following is correct order for using a servlet?
Answer is "init(), service(), destroy()"
What is destroy method in servlet?
destroy() method is called by the servlet container to indicate to a servlet that the servlet is being taken out of service. This method is only called once all threads within the servlet's service method have exited or after a timeout period has passed.
How many times init () destroy () service () method will be invoked?
This method accepts two parameters. destroy() method : The destroy() method is called only once. It is called at the end of the life cycle of the servlet.
How are servlets invoked?
You can invoke a servlet by directly addressing it from a Web page with a URL or by calling it programmatically from an already running servlet.
How servlet is created?
The servlet example can be created by three ways: By implementing Servlet interface, By inheriting GenericServlet class, (or) By inheriting HttpServlet class.
What is Init method in servlet?
Called by the servlet container to indicate to a servlet that the servlet is being placed into service. The servlet container calls the init method exactly once after instantiating the servlet. The init method must complete successfully before the servlet can receive any requests.
What is called servlet container?
A web container (also known as a servlet container; and compare "webcontainer") is the component of a web server that interacts with Jakarta Servlets. ... A web container handles requests to servlets, Jakarta Server Pages (JSP) files, and other types of files that include server-side code.
What is JSP page in Java?
JavaServer Pages (JSP) is a Java standard technology that enables you to write dynamic, data-driven pages for your Java web applications. JSP is built on top of the Java Servlet specification. The two technologies typically work together, especially in older Java web applications.
Which is not a directive?
9. Which is not a directive? Explanation: Export is not a directive.
What is the exact role of destroy method?
The destroy() method of thread class is used to destroy the thread group and all of its subgroups. The thread group must be empty, indicating that all threads that had been in the thread group have since stopped.
When init () and destroy () will be called?
3.3. Init and Destroy. Just 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 the servlet's instance.
When destroy method of filter is called?
d) The destroyer() method is called after the filter has executed. Explanation: destroy() is an end of life cycle method so it is called at the end of life cycle. 8.
Is used to read data from a client request?
Reading Form Data from Servlets You use getParameter exactly the same way when the data is sent by GET as you do when it is sent by POST. The servlet knows which request method was used and automatically does the right thing behind the scenes.
When Init method of servlet get called?
8. When init() method of servlet gets called? The init method is created to be called only once. When servlet is first loaded into memory,that time the call goes to the init method,and just because it is loaded once so it is not called again for each user request.
Is servlet a Web service?
Servlets are API which is simple and provides capabilities to write server side components. Web Service uses ServletContainer class which is again a Servlet class, which handles the request in clean and structured way. The REST stands for REpresentational STateless Protocol.
What are the two main types of servlet?
- 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.
Is servlet a framework?
The 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.