Answers to Chapter 10
 | Reviewing It |
| 1: | Explain the purpose of a JAR file. |
| A1: | To put all associated pieces of code together in a single downloadable file |
| 2: | Why does the JDeveloper software create a HTML file when saving the Java program? |
| A2: | The HTML file will be accessed by the Web browser. This file contains the necessary HTML code to access the java program |
| 3: | Why does the JDBC thin client software prompt for userid and password? |
| A3: | Because the thin drivers maintain connectivity between the client and the database where the thick drivers maintain connectivity between the servlet and the database |
| 4: | What is a DAD and why is it important? |
| A4: | This database descriptor is used by servlets to make automatic connections to the database when the DAD name is referenced in the URL |
| 5: | What does the java function out.println() do. |
| A5: | Creates output in the HTML file. |
 | Checking It |
| 1: | What does JAR stand for?
|
| A1: | b |
| 2: | The DB Servlet runs on
|
| A2: | c |
| 3: | You have to FTP the servlet code created to its intended target. True/False |
| A3: | False, the JDeveloper software can do the deployment. |
 | Applying It |
Independent Exercise 1:
- Build the 'Hello World' example in Listing 10.1.
- Deploy it and run it.
Independent Exercise 2:
- Build a master/detail servlet that displays department information then displays the employees and their managers underneath.
- Deploy and run the servlet.
Independent Exercise 3:
- Build an applet and a servlet that prompts the user for a valid EMPNO in the EMP table, then displays the correct row from the EMP table.
- Deploy and run the code.
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