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Important Web Design and Development Short Questions

Chapter: 41
Question 1:
Describe the function of the Business Layer.
Answer: The Business Layer implements application-specific functionality, such as business rules and processes, like handling transactions in a banking system.
Chapter: 41
Question 2:
What is the purpose of the Data Layer in an application?
Answer: The Data Layer manages data storage and retrieval, interacting with databases or other data sources, and encapsulates the logic for data access.
Chapter: 41
Question 3:
How does a three-tier architecture differ from a two-tier architecture?
Answer: A three-tier architecture includes separate tiers for presentation, application processing, and data management, while a two-tier architecture combines presentation and application processing on one tier, with a separate tier for data management.
Chapter: 41
Question 4:
What Java technology is used in the Presentation Layer?
Answer: In the Presentation Layer, Java technologies like JSP (JavaServer Pages) and Servlets are used to generate and handle user interfaces and interactions.
Chapter: 41
Question 5:
What is the function of Enterprise JavaBeans (EJBs) in the Business Layer?
Answer: EJBs encapsulate business logic, providing scalability, robustness, and transactional support for complex business processes in enterprise applications.
Chapter: 41
Question 6:
How does the MatrixMultiplier class interact with the Data Layer?
Answer: The MatrixMultiplier class calculates the product of matrices and uses the MatrixDAO class in the Data Layer to store the result in the database.
Chapter: 41
Question 7:
What is the role of the ControllerServlet in the case study?
Answer: The ControllerServlet processes user input, interacts with the Business Layer to perform operations, and forwards the results to the presentation layer for display.
Chapter: 41
Question 8:
How does the MatrixDAO class store matrix results in the database?
Answer: The MatrixDAO class converts the MatrixBean into a string format and uses SQL to insert the matrix order and values into the database.
Chapter: 41
Question 9:
What does the MatrixBean class represent and how is it used?
Answer: The MatrixBean class represents a 2D matrix and provides methods to set matrix values, retrieve them, and convert the matrix to a string for storage or display.
Chapter: 42
Question 10:
What was the primary drawback of using the Servlet API that led to the development of JSP?
Answer: The Servlet API required explicit declaration of variables, knowledge of data types, and involved cumbersome syntax, making code maintainability and extensibility challenging. This led to the development of JavaServer Pages (JSP).