Introduction to JavaScript

What is the main characteristic of a programming language that distinguishes it from a scripting language?

• Only languages developed by Microsoft can be called "programming languages."
• Programming languages are developed by private organizations whereas scripting languages are open-source.
• Programming languages are object-based, whereas scripting languages are object-oriented.
• Programming languages are compiled whereas scripting languages are interpreted.

JavaScript is an example of which language model?

• procedural
• object-oriented
• linear
• event-driven

Which line of code demonstrates the correct way to link an external JavaScript file to an X/HTML document?

• <script type="text/javascript/external" href="myJavaScriptCode.js">
• <#include type="text/javascript" src="myJavaScriptCode.js">
• <script type="text/javascript" src="myJavaScriptCode.js">
• <link type="text/javascript" href="myJavaScriptCode.js">

Which of the following code segments properly ensures that JavaScript code will not be displayed in the browser window by older browsers?

• <!-- 
  <script language="JavaScript" type="text/javascript"> 
  // JavaScript code
  var x = 10; 
  </script> 
  //-->
• <!-- 
  <script language="JavaScript" type="text/javascript" > 
  // JavaScript code
  var x = 10; 
  </script> 
  -->
• <script language="JavaScript"> 
  <!-- 
  // JavaScript code
  var x = 10; 
  //--> 
  </script>
• <script language="JavaScript" type="text/javascript"> 
  <!-- 
  // JavaScript code
  var x = 10; 
  --> 
  </script>

Which of the following is true about server-side JavaScript technologies?

• Implementations of server-side JavaScript include LiveWire and work with back-end server processes
• JavaScript is not used on the server side, only the client side.
• Server-side JavaScript is written within X/HTML documents.
• Server-side JavaScript is an ongoing project of the W3C expected to be released within the next year.

Which of the following is a feature of JavaScript?

• Requires variable types to be declared ("strong typing")
• Object-oriented
• Compiled on server before execution on client
• Checks object references at run time ("dynamic binding")

Which task is an example of a server-side JavaScript application?

• Parsing and disseminating user-submitted information
• Working with frames
• Launching a new window from a Web page
• Validating fields of data in a user-submitted Web form

Which of the following is a characteristic of event-driven programming?

• Programs log every action performed by the user.
• Events can trigger functions.
• The user is expected to interact with the program in a sequential manner.
• The program performs events automatically in a sequential manner.

Using JavaScript best practices, which X/HTML tag correctly targets a block of JavaScript code for browsers that support JavaScript version 1.5?

• <script type="JavaScript 1.5">
• <script language="JavaScript" version="1.5">
• <script language ="JavaScript 1.5">
• <script type="text/javascript">

JavaScript fits best under which category of languages?

• Object-oriented
• Object-based
• Object-independent
• Object-driven