Tuesday, March 1, 2011

Self Test: Chapters 1 to 5

Let us now test what we have learnt so far in our SCWCD exam preparation series.

Questions:

Question 1: What language is used to write servlets and JSP?

Question 2: What is the servlet life cycle and who manages it?

Question 3: What protocol do servlets and JSP use to communicate with clients?

Question 4: What is the relationship between servlets and JSP?

Question 5: What is the benefit of using a Servlet instead of CGI?

Answers:

Answer 1: Servlets are written in the Java language. JSPs on the other hand use a combination of HTML and Java. Eventually JSPs are converted into a pure Java servlet.

Answer 2: The servlet life cycle refers to the loading, initialization, invoking, and killing of a servlet. The container manages this life cycle

Answer 3: Servlets use the HTTP protocol

Answer 4: JSPs are converted to servlets. First, the JSP source is parsed and a Java source file is generated. Then this source is compiled into a Servlet

Answer 5: A CGI spawns a heavyweight process for every request it receives. It is both resource intensive and not scalable. Whereas, a Servlet spawns only a lightweight thread for every request it receives. Hence it is faster than CGI as well as much more scalable when compared to CGI.

Previous Chapters: Quick Recap - Chapters 1 to 5

Next Chapter: Chapter 6 - Servlet Handling of Http Requests

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