Error handling is crucial to MySQL programming, allowing developers to catch and manage exceptions, warnings, and unexpected conditions during query execution. Database operations can fail unpredictably without proper error handling, leading to data corruption or incomplete transactions. This quiz will test your understanding of MySQL error handling mechanisms, including handlers, SQLSTATE codes, the SIGNAL statement, and best practices for managing errors in stored procedures.
1.
Which SQLSTATE code class indicates a successful operation?
2.
Which SQLSTATE class indicates a warning?
3.
Which of the following conditions can be used in a DECLARE HANDLER statement?
4.
What is the purpose of the SIGNAL statement?
5.
Which SQL statement is used to manually raise an error in MySQL?
6.
How can you handle multiple error conditions in a single handler?
7.
What happens if a CONTINUE handler is used improperly in a loop?
8.
What is the purpose of SQLSTATE codes in MySQL?
9.
What is the primary purpose of error handling in MySQL?
10.
Which of the following correctly declares an error handler that continues execution after a warning?
11.
Which statement is used to define an error handler in MySQL?
12.
Which SQLSTATE code would you use to signal a division by zero error?
13.
What will happen if an error occurs inside a MySQL stored procedure without a declared handler?
14.
What does the following code do?
DECLARE EXIT HANDLER FOR SQLEXCEPTION
BEGIN
SIGNAL SQLSTATE '45000'
SET MESSAGE_TEXT = 'An error occurred';
END;
15.
Which of the following is NOT a valid MySQL handler type?
16.
Which handler type should be used for non-critical errors where execution should continue?
17.
Which of the following handlers is best for handling division by zero errors?
18.
What does an EXIT handler do when an error occurs?
19.
Which SQLSTATE code class represents an exception error?
