What is the primary advantage of using a PreparedStatement in JDBC?
- PreparedStatements are faster than Statement objects.
- PreparedStatements are used for executing stored procedures.
- PreparedStatements help prevent SQL injection attacks.
- PreparedStatements require a connection pool.
PreparedStatements are precompiled SQL statements that are faster than Statement objects, providing better performance in JDBC operations.
What is a common strategy for handling the situation when all connections in the pool are in use?
- Automatically create more connections
- Ignore the situation
- Terminate the application
- Wait for a connection to become available
Waiting for a connection to become available is a common strategy, ensuring that the application doesn't crash when all connections in the pool are in use.
How does PreparedStatement help in preventing SQL injection attacks?
- It automatically escapes special characters in the SQL query.
- It encrypts the entire SQL query.
- It relies on client-side validation.
- It uses parameterized queries.
PreparedStatement helps prevent SQL injection attacks by using parameterized queries, ensuring that user input is treated as data and not executable code.
What method is used to execute a stored procedure using a CallableStatement?
- callProcedure()
- execute()
- executeProcedure()
- executeQuery()
The execute() method is used to execute a stored procedure using a CallableStatement.
How can you retrieve the output of a stored procedure using CallableStatement?
- getOutput()
- getOutputParameterValue()
- getProcedureOutput()
- getResultSet()
You can retrieve the output of a stored procedure using getOutputParameterValue() method in CallableStatement, which returns the value of a designated OUT parameter after the stored procedure execution.
What is the impact on performance when using PreparedStatement for repeated database operations?
- Decreased performance due to compilation
- Improved security with parameterized queries
- Increased performance due to query caching
- No impact on performance
Using PreparedStatement can lead to increased performance as the query is precompiled and cached, reducing database load and improving execution speed.
How do you handle transaction management when using PreparedStatement and CallableStatement?
- Explicitly commit transactions using commit()
- Rollback transactions using rollback()
- Transactions are automatically managed
- Use Connection.setAutoCommit(false)
To handle transactions with PreparedStatement and CallableStatement, set auto-commit to false using Connection.setAutoCommit(false) and then explicitly commit or rollback transactions using commit() and rollback() methods, respectively.
To set a date in a PreparedStatement, the method _________ is used.
- setDate()
- setDateValue()
- setTime()
- setTimestamp()
The setDate() method is used to set a date in a PreparedStatement when working with JDBC.
When using a CallableStatement, the method _________ is used to register an OUT parameter.
- outParameter()
- registerOutParameter()
- registerOutput()
- setOutParameter()
When using a CallableStatement in JDBC, the registerOutParameter() method is used to register an OUT parameter.
A __________ strategy in connection pooling helps to optimize resource utilization under varying load conditions.
- Adaptive Allocation
- Dynamic Allocation
- Incremental Allocation
- Static Allocation
An Adaptive Allocation strategy in connection pooling helps optimize resource utilization under varying load conditions.