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.
A web application experiences intermittent database connection issues. What connection pooling feature should be evaluated to resolve this?
- Connection Retry
- Idle Timeout
- Max Pool Size
- Min Pool Size
To address intermittent database connection issues, one should evaluate the Max Pool Size setting in connection pooling, which determines the maximum number of connections that can be created.
In a high-load scenario, a web application is unable to obtain database connections quickly. What aspect of connection pooling should be optimized?
- Acquire Increment
- Idle Timeout
- Max Idle Time
- Min Pool Size
To optimize obtaining database connections in a high-load scenario, focus on the Acquire Increment setting, which determines how many connections are added to the pool when all connections are in use.
How should a developer handle a scenario where a stored procedure returns multiple result sets?
- Close the connection and reopen it
- Ignore additional result sets
- Use multiple ResultSets and process each separately
- Use only the first result set
To handle multiple result sets returned by a stored procedure, the developer should use multiple ResultSets and process each one separately. Ignoring additional result sets or closing and reopening the connection are not appropriate solutions.
In a transactional context, if one of the PreparedStatement executions fails, what should be the approach for handling this situation?
- Commit the successful executions, ignore the failure
- Continue with the next PreparedStatement
- Manually undo the changes of successful executions
- Rollback the entire transaction
In a transactional context, if one of the PreparedStatement executions fails, the appropriate approach is to rollback the entire transaction to maintain data consistency. Committing successful executions and ignoring the failure may lead to inconsistent data.
What is the primary purpose of transaction management in database operations?
- Encrypting data
- Ensuring data consistency
- Managing user permissions
- Optimizing queries
The primary purpose of transaction management is to ensure data consistency by either committing or rolling back changes as a single, atomic operation.
Which SQL statement is used to start a transaction in a database?
- BEGIN TRANSACTION
- COMMIT TRANSACTION
- ROLLBACK TRANSACTION
- START TRANSACTION
The START TRANSACTION statement is used to begin a transaction in a database, marking the starting point for a series of SQL statements to be treated as a single unit.
In what scenarios is CallableStatement preferable over PreparedStatement?
- Executing SQL queries with input parameters
- Handling batch updates
- Handling stored procedure calls
- Optimizing read-only operations
CallableStatement is preferable when dealing with stored procedures as it allows the execution of precompiled SQL queries, making it suitable for scenarios where stored procedures are used.
A PreparedStatement can be optimized by the JDBC driver using __________.
- batch processing
- caching
- connection pooling
- query optimization
A PreparedStatement can be optimized by the JDBC driver using connection pooling, which involves reusing database connections to improve performance.