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Doubt in servlet mapping

 
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Marks: 1 Given that a servlet is correctly declared with the tag

<servlet>
<servlet-name>HelloWorld</servlet-name>
<servlet-class>com.examulator.HelloWorld</servlet-class>
</servlet>
Which of the following represent the correct syntax for mapping a servlet url to a servlet name

a)
<servlet-mapping>
<servlet-name>HelloWorld</servlet-name>
<url-pattern>hello</url-pattern>
</servlet-mapping>

b)
<servlet-mapping>
<servlet-name>HelloWorld</servlet-name>
<url-pattern>*.java</url-pattern>
</servlet-mapping>

c)
<servlet-mapping>
<servlet-name>HelloWorld</servlet-name>
<url-pattern>/*</url-pattern>
</servlet-mapping>

d)
<servlet-mapping>
<servlet-name>HelloWorld</servlet-name>
<url-pattern>/com.examulator.HelloWorld</url-pattern>
</servlet-mapping>


Choose at least one answer.
a. a
b. b The servlet container doesn't care that the extension is .java it just sees it as a string and maps to it.
c. c This is a fairly standard maping and would match any given URL.
d. d I wouldn't recommend this type of mapping but it does work.

Answer is 3 and 4
why option 2 is wrong?

examulator.com
 
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yes, i tried it when servlet-mapping as *.java. and it works without any problems. so option b seems to be right. anyways , the options have been badly phrased with abstract terms like fairly, recommend.
 
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