30 Questions
What is a characteristic of drivers in databases?
They are database specific
What type of driver permits modern data-driven Java applications?
Type 5 driver
What does the JDBC API standardize?
How to connect to a database
What is a limitation of JDBC?
It does not standardize the SQL sent to the database
What is a benefit of using JDBC?
It makes changing to another database a lot easier
What is a characteristic of DataDirect JDBC drivers?
They are compliant with Type 4 architecture
What type of ResultSet object is sensitive to changes to the underlying data?
TYPE_SCROLL_SENSITIVE
What is the purpose of CONCUR_UPDATABLE in a ResultSet object?
To allow the ResultSet to be updated
Which type of ResultSet object can move the cursor to an absolute position or relative to the current cursor position?
TYPE_SCROLL_INSENSITIVE
What does the TYPE_FORWARD_ONLY constant indicate in a ResultSet object?
The cursor can move only forward
What is the purpose of Getter methods in a ResultSet object?
To retrieve column values from the current row
What constant indicates that a ResultSet object may NOT be updated?
CONCUR_READ_ONLY
What is the purpose of the web.xml file in a web application?
To configure various aspects of the web application
What is the purpose of the servlet tag in the web.xml file?
To register a servlet with the container
What is the purpose of the public URL name of a servlet?
To allow the client to access the servlet service
What happens if a client requests a servlet using its registration name or servlet class name?
The container doesn't execute the servlet
What is the purpose of the registration name in a servlet tag?
To define a user-defined name for the servlet
What is the format of the public URL name of a servlet?
A user-defined name preceding with '/'
What is the purpose of the jspInit() method in the JspPage interface?
To perform initialization during the life cycle of the JSP
Which interface extends the Servlet interface?
JspPage
What is the significance of the underscore in the _jspService() method?
It signifies that the method cannot be overridden
What is the purpose of JSP tags in a JSP program?
To define Java code that is executed before sending the output to the browser
What is the purpose of the jspDestroy() method in the JspPage interface?
To perform some clean up operations before the JSP page is destroyed
Which interface provides the _jspService() method?
HttpJspPage
What approach does a Type 3 driver follow for communication?
Three-tier
What is the advantage of the middleware server in a Type 3 driver?
It provides typical middleware services
What is a benefit of the client driver to middleware communication in a Type 3 driver?
It is database-independent
What is a disadvantage of the Type 3 driver?
It requires database-specific coding to be done in the middle tier
What is the significance of a middleware server in a Type 3 driver?
It can provide caching and load balancing
What is a characteristic of a Type 3 driver?
A single driver can handle any database
Understand the architecture and communication approach of JDBC (Java Database Connectivity) in connecting to a database. Learn how JDBC sends API calls to a middle-tier net server and translates them into DBMS-specific network protocols.
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