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Important Web Design and Development Short Questions

Chapter: 33
Question 1:
Explain how the PersonDAO class is utilized in the address book case study.
Answer: The PersonDAO class is responsible for interacting with the database to perform operations such as searching for a person by name. It establishes a database connection, executes queries, and retrieves data, which is then used to create and return a PersonInfo object.
Chapter: 33
Question 2:
What functionality does the SearchPersonServlet provide in the address book application?
Answer: The SearchPersonServlet provides a user interface to input a person's name for search. It generates an HTML form that submits the search request to the ShowPersonServlet, allowing users to search for individuals in the address book and view the results.
Chapter: 33
Question 3:
How does the ShowPersonServlet process the search request?
Answer: The ShowPersonServlet processes the search request by obtaining the name parameter from the user's input, using the PersonDAO class to search for the person in the database, and then displaying the search results on a web page. It handles both GET and POST requests to perform the search operation.
Chapter: 33
Question 4:
What is the advantage of using packages in Java programming?
Answer: Packages in Java help organize classes into directories, preventing name conflicts and enhancing code maintainability. They also facilitate better organization of code and improve collaboration by logically grouping related classes and interfaces, which simplifies management and reduces errors.
Chapter: 33
Question 5:
How does JSP technology differ from using servlets for generating web pages?
Answer: JSP technology allows for embedding Java code directly into HTML using special tags, which simplifies the creation of dynamic web content. Unlike servlets that require extensive use of println() statements to generate HTML, JSPs separate HTML and Java code, making it easier to manage and update web pages.
Chapter: 33
Question 6:
What are the key advantages of JSP over other technologies like PHP or ASP?
Answer: JSP offers several advantages over technologies like PHP or ASP, including better integration with Java for dynamic content, portability across multiple servers and operating systems, and more convenient HTML creation compared to pure servlets. JSPs also support advanced tools and provide a clear separation of presentation and business logic.
Chapter: 34
Question 7:
What is a Java Server Page (JSP)?
Answer: A JSP is a text-based document that can return static or dynamic content to a client's browser. Static content includes HTML, XML, and text, while dynamic content includes Java code, JavaBeans properties, and custom tags.
Chapter: 34
Question 8:
What happens when a JSP is first invoked?
Answer: When a JSP is first invoked, it goes through several phases: the web browser requests the JSP source code, which is parsed into HTML and Java code. The Java code is then compiled into servlet code, which is mixed with HTML and displayed to the user. Subsequent requests do not repeat the compilation phase.
Chapter: 34
Question 9:
List some benefits of using JSP.
Answer: JSPs are convenient because they use familiar Java and HTML syntax, efficient due to handling requests with simple Java threads, portable across various architectures and operating systems, and inexpensive with many free or low-cost web servers available.
Chapter: 34
Question 10:
How does JSP differ from a Servlet in terms of code complexity?
Answer: JSP is simpler and more HTML-like, requiring less code compared to servlets. For example, displaying the current date in JSP only requires a few lines of code, while the equivalent servlet code is more verbose and requires additional methods.