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.
In a CallableStatement, the method _________ is used to execute a SQL function.
- execute()
- executeFunction()
- executeQuery()
- executeUpdate()
In a CallableStatement, the method executeFunction() is used to execute a SQL function.
To improve performance, a PreparedStatement uses _________ to precompile SQL statements.
- compile()
- precompile()
- prepare()
- prepareStatement()
To improve performance, a PreparedStatement uses the prepareStatement() method to precompile SQL statements.
Which method in a servlet is used by default to handle GET requests?
- doGet()
- doPost()
- init()
- service()
The doGet() method in a servlet is used by default to handle GET requests.
The CallableStatement method _________ is used to get the result set of a stored procedure.
- executeQuery()
- getCallResult()
- getProcedureResult()
- getResultSet()
The CallableStatement method getResultSet() is used to get the result set of a stored procedure.
A developer needs to insert multiple rows into a database efficiently. Which statement type and technique should they use?
- Batch processing using PreparedStatement
- Individual inserts using Statement
- Stored Procedure with Cursor
- Trigger for each row
Batch processing using a PreparedStatement is an efficient way to insert multiple rows into a database as it reduces the number of database round-trips. It allows the developer to group multiple SQL statements and execute them as a batch.
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.
In transaction management, what does the term 'ACID' stand for?
- Advanced Commitment Integration Design
- All Committed in Database
- Association of Commitment in Databases
- Atomicity, Consistency, Isolation, Durability
'ACID' stands for Atomicity, Consistency, Isolation, and Durability, which are the key properties ensuring reliable and secure database transactions.