bt0083 smu bsc it Fall 2015 ivth sem assignment

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PROGRAM - BSc IT

SEMESTER - FOURTH

SUBJECT CODE & NAME - BT0083, Server Side Programming-Theory

CREDIT - 4

BK ID - B1088

MAX. MARKS – 60

Q1. Define and explain web servers and application servers. 5+5 = 10

Ans: Web Servers and Application Servers: A Web Server is a software program that delivers Web pages and other documents to browsers using the HTTP protocol. 

When the Web server

Q2. Explain Servlet methods used to retrieve data from HTML form. Give an examples. 7+3 = 10

Ans: Servlet methods: HttpServlet is a protocol dependent, can handle only Http specific requests. The HttpServlet object's implementation of the service() method, which is called during each service request, calls one of the seven different helper methods. HTTP request can be GET, POST, HEAD, DELETE, PUT, TRACE

Q3. Describe the following exception handling methods in a servlet with the help of examples. 10

1. Using the web.xml file 2. Using a RequestDispatcher

Ans: Using the web.xml file: Handling errors can be defined declaratively using the sub tag of <errorpage> in web.xml file. There are two ways in this declaration.

A.     <error-code> tag of <

Q4. Explain the two JSP architectures. 5+5 = 10

Ans: JSP Architectures: There are two general approaches you can take when developing Web applications using JSP.

I.                    Page-centric  (Model 1) and 

II.                 II. Servlet-centric architecture or N-tier architecture (Model 2)

I.                   Model-1

Q5. Draw and explain the diagram of custom tag life cycle. 2+8 = 10

Ans: The Custom Tag lifecycle.

Q6. Describe the process of deactivating individual expression language statements with example.10

Ans: Deactivating Individual Expression Language Statements: In JSP 1.2 and earlier, strings of the form ${...} had no special meaning. So, it is possible that the characters $ {appear within a previously created page that is now

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