Answers to Chapter 8

Reviewing It

1: What kind of networks do Web browsers support?
A1: TCP/IP
2: Explain what a CGI is.
A2: Usually a program being accessed instead of a computer file
3: What is the difference between an Applet and a Servlet?
A3: Applets are Java programs that are parts of Web pages. They are downloaded through the listener to a compliant Web browser and are executed on the client machine. Servlets are host-based Java programs that build dynamic Web pages that are then passed back to the Web browser
4: What is the difference between thin and thick JDBC Drivers?
A4: Thin JDBC is used by applets and provides database connectivity for a particular client session. Thick JDBC is used to maintain connectivity for the duration of the servlet process
5: What is a virtual address?
A5: What follows the first / of a URL is the virtual address, which relates to a physical location on the particular computer
6: Briefly describe why one might use PL/SQL or Java or Portal (and vice versa).
A6: Programmers are already familiar with PL/SQL but features might be limited, Java has a steep learning curve, Portals appearance is not that flexible.

Checking It

1: HTTP is

  1. The Internet

  2. The protocol between the Web browser and the Web server

  3. The language used to build Web pages

  4. The CGI program

A1: b
2: HTML is

  1. The Internet

  2. The protocol between the Web browser and the Web server

  3. The language used to build Web pages

  4. The CGI program

A2: c
3: A URL is a Universal Resource Locator.

True/False

A3: False, Uniform Resource Locator
4: Oracle9iAS is

  1. Oracle's latest database engine

  2. Oracle's latest Web server

  3. Oracle's latest forms server

  4. Oracle's latest clustered database technology

A4: b
5: Oracle Corp refers to Oracle9iAS as a

  1. 1-Tier environment

  2. 2-Tier environment

  3. 3-Tier environment

  4. 4+-Tier environment

A5: c
6: PL/SQL is

  1. Runtime interpreted

  2. Full-featured open language

  3. Wizard-based Web development

A6: a
7: Java is

  1. Runtime interpreted

  2. Full-featured open language

  3. Wizard-based Web development

A7: b
8: Portal V3.0 is

  1. Runtime interpreted

  2. Full-featured open language

  3. Wizard-based Web development

A8: c.

Applying It

Independent Exercise 1:

  • Web browse www.quepublishing.com.

  • On your browser tool bar (Netscape), select View, Page Source, (Internet Explorer) select View,Source.

  • Review the various HTML tags and commands that make up this Web page.

  • Notice the tags around any pictures or objects that downloaded.

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