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Connecting Java Application with Database

16 Questions

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Connecting Java Application with Database

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Questions and Answers

What does the executeQuery() method return?

A String

A Boolean

A ResultSet object (correct)

An Integer

What is used instead of the parameter in Prepared Statement for passing values dynamically?

? (correct)

Which method is used to create a PreparedStatement in Java?

newPreparedStatement()

makePreparedStatement()

prepareStatement() (correct)

createPreparedStatement()

What is the purpose of using PreparedStatement in Java?

To execute recompiled SQL statements Signup and view all the answers

What step is required to establish a connection with the database in a Java application?

Step 4 Signup and view all the answers

Which method is used to load the drivers in a Java application?

forName() Signup and view all the answers

How is the Oracle driver loaded into memory at runtime?

Class.forName("com.mysql.jdbc.Driver") Signup and view all the answers

When should the drivers be registered in a Java program?

Once in the program Signup and view all the answers

What does the DriverManager.registerDriver() method do?

Load the Oracle driver into memory at runtime Signup and view all the answers

What is the purpose of the Connection object in Java?

To establish a connection with the database Signup and view all the answers

What does the String url = “jdbc:mysql://localhost/empdetails” represent?

The database URL Signup and view all the answers

What is the purpose of the Statement st = con.createStatement() in Java?

To interact with the database by sending SQL commands Signup and view all the answers

What is the purpose of DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver())?

To register the Oracle driver for use Signup and view all the answers

What is the role of 'con' in the line 'Connection con = DriverManager.getConnection(url,user,password)'?

It is a reference to the Connection interface Signup and view all the answers

What does 'url' represent in 'String url = “jdbc:mysql://localhost/empdetails”'?

It holds the IP address of the database Signup and view all the answers

What is the purpose of 'Statement st = con.createStatement();'?

To create a statement for interacting with the database Signup and view all the answers