JDBC Architecture and Communication

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What is a characteristic of drivers in databases?

They use SQL protocols

They are independent of the database vendor

They are database specific (correct)

They use standard network protocols

What type of driver permits modern data-driven Java applications?

Type 4 driver

Type 2 driver

Type 5 driver (correct)

Type 3 driver

What does the JDBC API standardize?

How to connect to a database (correct)

The SQL sent to the database

How to call stored procedures

The database vendor

What is a limitation of JDBC?

It does not standardize the SQL sent to the database Signup and view all the answers

What is a benefit of using JDBC?

It makes changing to another database a lot easier Signup and view all the answers

What is a characteristic of DataDirect JDBC drivers?

They are compliant with Type 4 architecture Signup and view all the answers

What type of ResultSet object is sensitive to changes to the underlying data?

TYPE_SCROLL_SENSITIVE Signup and view all the answers

What is the purpose of CONCUR_UPDATABLE in a ResultSet object?

To allow the ResultSet to be updated Signup and view all the answers

Which type of ResultSet object can move the cursor to an absolute position or relative to the current cursor position?

TYPE_SCROLL_INSENSITIVE Signup and view all the answers

What does the TYPE_FORWARD_ONLY constant indicate in a ResultSet object?

The cursor can move only forward Signup and view all the answers

What is the purpose of Getter methods in a ResultSet object?

To retrieve column values from the current row Signup and view all the answers

What constant indicates that a ResultSet object may NOT be updated?

CONCUR_READ_ONLY Signup and view all the answers

What is the purpose of the web.xml file in a web application?

To configure various aspects of the web application Signup and view all the answers

What is the purpose of the servlet tag in the web.xml file?

To register a servlet with the container Signup and view all the answers

What is the purpose of the public URL name of a servlet?

To allow the client to access the servlet service Signup and view all the answers

What happens if a client requests a servlet using its registration name or servlet class name?

The container doesn't execute the servlet Signup and view all the answers

What is the purpose of the registration name in a servlet tag?

To define a user-defined name for the servlet Signup and view all the answers

What is the format of the public URL name of a servlet?

A user-defined name preceding with '/' Signup and view all the answers

What is the purpose of the jspInit() method in the JspPage interface?

To perform initialization during the life cycle of the JSP Signup and view all the answers

Which interface extends the Servlet interface?

JspPage Signup and view all the answers

What is the significance of the underscore in the _jspService() method?

It signifies that the method cannot be overridden Signup and view all the answers

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 Signup and view all the answers

What is the purpose of the jspDestroy() method in the JspPage interface?

To perform some clean up operations before the JSP page is destroyed Signup and view all the answers

Which interface provides the _jspService() method?

HttpJspPage Signup and view all the answers

What approach does a Type 3 driver follow for communication?

Three-tier Signup and view all the answers

What is the advantage of the middleware server in a Type 3 driver?

It provides typical middleware services Signup and view all the answers

What is a benefit of the client driver to middleware communication in a Type 3 driver?

It is database-independent Signup and view all the answers

What is a disadvantage of the Type 3 driver?

It requires database-specific coding to be done in the middle tier Signup and view all the answers

What is the significance of a middleware server in a Type 3 driver?

It can provide caching and load balancing Signup and view all the answers

What is a characteristic of a Type 3 driver?

A single driver can handle any database Signup and view all the answers