21.5 Java4550r-review

Table of contents

• Preface
• Questions
  • 1 , 2 , 3 , 4 , 5 , 6 , 7
• Answers
• Miscellaneous

Preface

This module is one in a collection of modules designed for teaching INEW 2338 Advanced Java (Web) at Austin Community College in Austin, TX.

This module contains review questions and answers keyed to the module titled Java4550: Session Tracking using Hidden Fields in the Servlets sub-collection.

Once you study that module, you should be able to answer the review questions in this module.

The questions and the answers in this module are connected by hyperlinks to make it easy for you to navigate from the question to the answer and back again.

Questions

Question 1

True or False?

The HTTP protocol is a very sophisticated protocol that retains historical information from one client request to the next.

Go to answer 1

Question 2

True or False?

The maintenance of historical information during communications on the web is often referred to as "session tracking."

Go to answer 2

Question 3

True or False?

There are several different ways to accomplish session tracking with a servlet. One of those ways is commonly known as hidden fields .

Go to answer 3

Question 4

True or False?

The hidden fields approach to session tracking has a very long persistence (days, months, years) and maintains historical information over many user sessions on a website.

Go to answer 4

Question 5

True or False?

An HTTP server does not remember historical information from one request to the next.

Go to answer 5

Question 6

True or False?

Servlet code can call the getParameter method on the incoming request object to get a reference to a String array object containing the String values of all incoming hidden fields whose name matches the String passed as a parameter to the method.

Go to answer 6

Question 7

True or False?

Servlet code can call the getParameter method on the incoming request object to get a reference to a String objectcontaining the String value of an incoming hidden field whose name matches the String passed as a parameter to the method. You should only use this method when you are sure the parameter has only one value.Otherwise, the results may not be what you intended.

Go to answer 7

What is the meaning of the following two images?

These images were inserted here simply to insert some space between the questions and the answers to keep them from being visible on the screen at thesame time.

This image was also inserted for the purpose of inserting space between the questions and the answers.

Answers

Answer 7

True.

Go back to Question 7

Answer 6

False. Servlet code can call the getParameterValues method on the incoming request object to get a reference to a String array object containing the String values of all incoming hidden fields whose name matches the String passed as a parameter to the method.

Go back to Question 6

Answer 5

True.

Go back to Question 5

Answer 4

False. The hidden fields approach to session tracking is generally limited to one session consisting of multiple requests.

Go back to Question 4

Answer 3

True.

Go back to Question 3

Answer 2

True.

Go back to Question 2

Answer 1

False. The HTTP protocol is a relatively simple request/response protocol that does not retain historical information from one client request to the next.

Go back to Question 1

Miscellaneous

This section contains a variety of miscellaneous information.

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