19.8 Java4650r-review

Table of contents

• Preface
• Questions
  • 1 , 2 , 3 , 4 , 5
• 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 Java4650: The URLConnection Class in the Network Programming 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 URLConnection class is an abstract class that can be extended . It has a protected constructor that takes a URL object as a parameter.

Go to answer 1

Question 2

True or False?

The URLConnection class can be instantiated directly.

Go to answer 2

Question 3

True or False?

A common way to get a URLConnection object is to call a method on a URL object that returns an object of a subclass of the URLConnection class.

Go to answer 3

Question 4

True or False?

The method named openConnection can be called on a URL object to get a reference to an object of a class that is a subclass of the URLConnection class.

Go to answer 4

Question 5

True or False?

Three methods can be called on a URLConnection object to obtain the following three informational aspects of the URL:

• the URL
• the date that the file was last modified
• the content type of the file

Go to answer 5

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 5

True.

Go back to Question 5

Answer 4

True.

Go back to Question 4

Answer 3

True.

Go back to Question 3

Answer 2

False. The URLConnection class is abstract , and therefore cannot be instantiated directly. However, it can be extended , and it has a protected constructor that requires a URL object as a parameter.

Go back to Question 2

Answer 1

True.

Go back to Question 1

Miscellaneous

This section contains a variety of miscellaneous information.

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