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Questions and Answers
What type of executables can be written using Java?
What type of executables can be written using Java?
Which interface does JDBC provide for Java programs to access databases?
Which interface does JDBC provide for Java programs to access databases?
What is a characteristic of JDBC mechanism?
What is a characteristic of JDBC mechanism?
Which layer in the JDBC Architecture provides the application-to-JDBC Manager connection?
Which layer in the JDBC Architecture provides the application-to-JDBC Manager connection?
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What does the 'executeUpdate' method return?
What does the 'executeUpdate' method return?
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How is a Prepared Statement different from a regular Statement?
How is a Prepared Statement different from a regular Statement?
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In the given Java code, what is the purpose of 'ResultSet result = statement.executeQuery(sql)'?
In the given Java code, what is the purpose of 'ResultSet result = statement.executeQuery(sql)'?
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What does the 'Class.forName("com.mysql.jdbc.Driver")' method do in the given Java code?
What does the 'Class.forName("com.mysql.jdbc.Driver")' method do in the given Java code?
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Which ResultSet type allows the cursor to move through the dataset in both forward and backward directions?
Which ResultSet type allows the cursor to move through the dataset in both forward and backward directions?
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What is the default ResultSet type in Java?
What is the default ResultSet type in Java?
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What method can be used to check if a specific ResultSet type is supported by the database?
What method can be used to check if a specific ResultSet type is supported by the database?
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What happens if there are changes to the underlying data while moving through the dataset using TYPE_SCROLL_INSENSITIVE?
What happens if there are changes to the underlying data while moving through the dataset using TYPE_SCROLL_INSENSITIVE?
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Study Notes
Java Executables
- Java can be used to write standalone executables, applets, and servlets.
JDBC Interface
- JDBC provides a java.sql package interface for Java programs to access databases.
JDBC Mechanism
- A characteristic of JDBC mechanism is that it is a two-tier and three-tier architecture.
JDBC Architecture
- The JDBC DriverManager provides the application-to-JDBC Manager connection.
executeUpdate Method
- The executeUpdate method returns an integer representing the number of rows affected by the execution of the SQL statement.
Prepared Statement vs Regular Statement
- A Prepared Statement is different from a regular Statement in that it is precompiled, allowing for more efficient execution of SQL queries.
ResultSet in Java Code
- The purpose of 'ResultSet result = statement.executeQuery(sql)' is to execute a SQL query and store the result in a ResultSet object.
Class.forName("com.mysql.jdbc.Driver")
- The 'Class.forName("com.mysql.jdbc.Driver")' method loads the JDBC driver for MySQL.
ResultSet Types
- TYPE_SCROLL_INSENSITIVE allows the cursor to move through the dataset in both forward and backward directions.
- The default ResultSet type in Java is TYPE_FORWARD_ONLY.
###Checking ResultSet Type Support
- The method 'databaseMetaData.supportsResultSetType()' can be used to check if a specific ResultSet type is supported by the database.
###Changes to Underlying Data
- If there are changes to the underlying data while moving through the dataset using TYPE_SCROLL_INSENSITIVE, the changes will not be reflected in the ResultSet.
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Description
Test your knowledge of Java executables and the characteristics of Java Database Connectivity (JDBC) with this quiz. Learn about Java applications, applets, servlets, JSPs, and EJBs, and understand the features and capabilities of JDBC for database access.
