This heading explains the working of tasks or instructions that you have just completed.

You will also find some other learning aids in the book, including:

These are short multiple-choice questions intended to help you test your own understanding.

These practical challenges give you ideas for experimenting with what you have learned.

You will also find a number of styles of text that distinguish between different kinds of information. Here are some examples of these styles, and an explanation of their meaning.

Code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles are shown as follows: "Finally, we need to set the JAVA_HOME and ORACLE_HOME environment variables."

A block of code is set as follows:

<process ...>
   ...
  <sequence>

    <!-- Wait for the incoming request to start the process -->
    <receive ... />

    <!-- Perform some activities -->
    ...

    <!-- Return the response -->
    <reply ... />
  </sequence>
</process>

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

<process ...> 
   ... 
   <sequence> 
      <!-- Wait for the incoming request to start the process --> 
      <receive ... />
      ...
   </sequence>
</process>

Any command-line input or output is written as follows:

SET JAVA_HOME=%USERPROFILE%	op_level_folder_jdkversion
SET ORACLE_HOME=%USERPROFILE%OracleMiddlewareOracle_Home

New terms and important words are shown in bold. Words that you see on the screen, in menus or dialog boxes for example, appear in the text like this: "The first step is the Welcome screen, where we only need to click on the Next button."