Development of Enterprise Applications I

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What is a characteristic of a Web page that uses a servlet?

It is derived from data that changes frequently (correct)
It is based on static HTML content
It is a JavaScript-based Web page
It is a Web page with a fixed layout

What is the purpose of setting the CLASSPATH when compiling and invoking servlets?

To set the path to the database server
To set the path to the Web server
To set the path to the Java compiler
To set the path to the servlet JAR file (correct)

What is the purpose of the HttpServlet class in a servlet?

To provide a generic servlet interface
To provide an HTTP-specific servlet interface (correct)
To provide a Web server interface
To provide a database interface

What is the package that provides interfaces and abstract classes for HTTP servlets?

javax.servlet.http (D) Signup and view all the answers

What is the purpose of the doGet method in a servlet?

To handle HTTP GET requests (C) Signup and view all the answers

What is the location of the servlet JAR file?

/lib/servlet.jar (D) Signup and view all the answers

What is the primary function of a servlet in a web application?

To read and process data sent by the client and send a response back (A) Signup and view all the answers

What is the advantage of using servlets over traditional CGI?

More efficient, convenient, powerful, portable, and secure (B) Signup and view all the answers

What is the purpose of HTTP request headers in a web application?

To provide additional information about the request (B) Signup and view all the answers

What is the main difference between a 1-Tier and a 3-Tier architecture in a web application?

The number of tiers used to process the request (A) Signup and view all the answers

What is the purpose of JavaServer Pages (JSP) in a web application?

To provide a template for dynamic content generation (A) Signup and view all the answers

Why is it necessary to build pages dynamically in a web application?

To provide personalized content to the user (B) Signup and view all the answers

What is the common prefix of the URL used to access content in a Web app?

<a href="http://host/webAppPrefix/Servlet/">http://host/webAppPrefix/Servlet/</a> (B) Signup and view all the answers

What is the main purpose of the deployment descriptor (web.xml)?

To control many aspects of Web application behavior (B) Signup and view all the answers

Where are Tag Library Descriptor files typically located in a Web app?

WEB-INF or a subdirectory thereof (A) Signup and view all the answers

What is one advantage of using a Web app?

It provides a single file for deployment (D) Signup and view all the answers

What is the purpose of the ServletContext in a Web app?

To provide a unique URL prefix for each Web app (B) Signup and view all the answers

Why should you not override the service method in a servlet?

Because you can add support for other types of requests instead (C) Signup and view all the answers

What can be added to support modification dates in a servlet?

getLastModified method (B) Signup and view all the answers

Which HTTP requests are automatically supported by the service method?

HEAD, OPTIONS, and TRACE requests (C) Signup and view all the answers

Why might you use the init method even when you don't read init parameters?

To set up data structures that don't change during the life of the servlet (A) Signup and view all the answers

How can you read initialization parameters in a servlet?

Using ServletConfig.getInitParameter (C) Signup and view all the answers

Where can you set init parameters in a servlet?

In the web.xml file (A) Signup and view all the answers

What is the default value of the 'message' variable in the ShowMessage class?

No message. (C) Signup and view all the answers

What is the purpose of the init method in the ShowMessage class?

To set up the servlet's initial configuration (A) Signup and view all the answers

What is the repeatString variable used for in the init method?

To parse an integer value from a string (B) Signup and view all the answers

What is the purpose of the filter method in ServletUtilities.java?

To filter special characters in HTML (B) Signup and view all the answers

What is a potential risk of not filtering special characters in HTML?

The servlet may be vulnerable to cross-site scripting attacks (D) Signup and view all the answers

What is the purpose of the doGet method in the ShowMessage class?