Init Params doubt

[Prakash Dwivedi]

Here is a question of JWebPlus
Question ID :994874119438
Which of the following lines can be inserted at line //1 to retrieve an initialization parameter "dbname" from the init() method of a servlet?
public void init()
{
//1
}
1.getServletConfig().getParameter("dbname");
2.getServletConfig().getInitParameter("dbname");
3.getServletContext().getInitParameter("dbname");
4.getInitParameter("dbname");
5.getInitParameterValue("dbname");
Correct Answer: 2 & 4
My doubt is here in the question it is not mentioned whether we r talking about init params of servlet or of servlet context so option 3 should also be correct.
Please explain.

[Roger Chung-Wee]

Servlet context initialization parameters are declared for the application/context as a whole. These parameters allow an administrator or deployment developer to change specific values in the application even after it is compiled and packaged. A typical example is setting the number of connections to be maintained by a database pool.
The init() method of a servlet is used to initialize a servlet, and the ServletConfig object is used by a servlet container to pass information to a servlet during initialization. So, 2 and 4 are correct.

[Sainudheen Mydeen]

Hi
I would say option 3-getServletContext().getInitParameter("dbname")is also a correct answer since the question does not say "dbname" is init param of servlet or servlet context.
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Sainudheen