What is servlet and JSP?
Java™ servlets and Java server pages (JSPs) are Java programs that run on a Java application server and extend the capabilities of the Web server. Java servlets are Java classes that are designed to respond to HTTP requests in the context of a Web application.
What is the difference between ServletContext and PageContext?
What is the major difference between ServletContext and PageContext? Ans: The major difference between ServletContect and PageContext is, the ServletContext is designed to provide information about the Container and on the other hand, the PageContext is designed to provide information about the Request.
Is JSP technology extensible True False Question 5?
Answer: Yes, JSP technology can be extensible through the development of tags or custom actions that are encapsulated in tag libraries.
What is JSP Fullform?
JSP stands for Java server Page. It is a programming tool that is used on the Application Server Side. JSP basically used to Support Platform – Independent and Dynamic Method to build Web dependent Applications. JSP pages are like ASP pages in that they are compiled on the server, instead of the user’s Web browser.
What are the 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 is faster JSP or servlet?
Servlet is faster than JSP. JSP is slower than Servlet because first the translation of JSP to java code is taking place and then compiles. Modification in Servlet is a time-consuming task because it includes reloading, recompiling and restarting the server as we made any change in our code to get reflected.
How do you delete a cookie within a JSP?
How to delete cookies with JSP?
- Read an already existing cookie and store it in Cookie object.
- Set cookie age as zero using the setMaxAge() method to delete an existing cookie.
- Add this cookie back into the response header.
How can you include the results of another page in JSP?
The jsp:include action tag is used to include the content of another resource it may be jsp, html or servlet. The jsp include action tag includes the resource at request time so it is better for dynamic pages because there might be changes in future.
What is media type of JSP?
application/jsp is correct media type of JSP pages.
Which is mandatory in JSP tag?
Which tag should be used to pass information from JSP to included JSP? Explanation: <%jsp:param> tag is used to pass information from JSP to included JSP.
What is the syntax of JSP?
JSP Actions
| S.No. | Syntax & Purpose |
|---|---|
| 1 | jsp:include Includes a file at the time the page is requested. |
| 2 | jsp:useBean Finds or instantiates a JavaBean. |
| 3 | jsp:setProperty Sets the property of a JavaBean. |
| 4 | jsp:getProperty Inserts the property of a JavaBean into the output. |
Where is JSP used?
It stands for Java Server Pages. It is a server side technology. It is used for creating web application. It is used to create dynamic web content.
Why is servlet used?
A servlet is a Java programming language class that is used to extend the capabilities of servers that host applications accessed by means of a request-response programming model. Although servlets can respond to any type of request, they are commonly used to extend the applications hosted by web servers.
Which are two main methods of servlet?
There are two main types of Servlet. They are Generic and HTTP servlets. We can use the constructor method to initialize the Servlets with the help of init() and the destructor method to remove the servlet from the resources using destroy().
Why JSP is used instead of servlet?
JSP provides added flexibility compared to the Servlet, as JSP contains custom tags for building reusable codes. Servers are not beneficial for session management, as they are not enabled by default, whereas JSP makes session management and tracking due to its property of handling multiple requests on a single thread.
Where servlets are used?
What is session in JSP?
In JSP, the session is the most regularly used implicit object of type HttpSession. It is mainly used to approach all data of the user until the user session is active.
How are cookies set in JSP?
Setting Cookies with JSP
- Step 1: Creating a Cookie object. You call the Cookie constructor with a cookie name and a cookie value, both of which are strings.
- Step 2: Setting the maximum age.
- Step 3: Sending the Cookie into the HTTP response headers.
Can we add static pages in servlet?
Abstract template for a static resource servlet
Use it together with the below interface representing a static resource. All you need is just extending from the given abstract servlet and implementing the getStaticResource() method according the javadoc.
What is the syntax expression in JSP?
A JSP expression element contains a scripting language expression that is evaluated, converted to a String, and inserted where the expression appears in the JSP file.
Is JSP is a framework?
Servlets and JSPs
The Servlet and JSP are incredibly simple ways to handle an incoming request, and to develop HTML that gets displayed inside a client’s web browser, respectively. All the existing Java-based web frameworks simply build on top of the Servlet and JSP API.
Why do we use JSP?
JSP supports both scripting and element-based dynamic content, and allows programmers to develop custom tag libraries to satisfy application-specific needs. JSP pages are precompiled for efficient server processing.
What is bean in JSP?
A JavaBean is a specially constructed Java class written in the Java and coded according to the JavaBeans API specifications. Following are the unique characteristics that distinguish a JavaBean from other Java classes − It provides a default, no-argument constructor.
How many types of JSP tags are there?
There are three types of JSP elements you can use: directive, action, and scripting.
Why is JSP used?
It is used to create dynamic web content. In this JSP tags are used to insert JAVA code into HTML pages. It is an advanced version of Servlet Technology. It is a Web based technology helps us to create dynamic and platform independent web pages.