30 Questions
What is an exception in PL/SQL?
A PL/SQL error raised during program execution
How can an exception be raised in PL/SQL?
Implicitly by the Oracle server
How can an exception be handled in PL/SQL?
By trapping it with a handler
What happens if an exception is not trapped in PL/SQL?
The program will terminate abruptly
Which of the following is NOT a named exception mentioned in the text?
DATA_ERROR
What does the 'WHEN others' clause signify in exception handling in PL/SQL?
Specifying the last exception to be handled
What is the purpose of an exception block in PL/SQL?
To handle error conditions during program execution
What are the two types of exceptions mentioned in the text?
System-defined and User-defined
What happens when an exception is encountered in PL/SQL?
The program execution transfers to the exception block
In the given PL/SQL example, what action is taken if 'TOO_MANY_ROWS' exception occurs?
The program prints 'Your select statement retrieved multiple rows'
What do System-defined Exceptions refer to in PL/SQL?
Exceptions defined by the PL/SQL system
What is the main function of handling exceptions in PL/SQL?
To gracefully deal with errors during program execution
What error is raised when a unique constraint is violated during an INSERT or UPDATE operation?
DUP_VAL_ON_INDEX
In the provided example code, what error is handled when attempting division by zero?
ZERO_DIVIDE
What action does the exception handler take when no data is found during the SELECT statement in the code snippet?
Outputs 'No such customer!'
What is the purpose of the EXCEPTION WHEN others statement in the code snippet?
To handle any other unidentified exception
What would be the output if 'c_id' in the code snippet is changed to 5?
'Name: Sunita' and 'Address: Delhi'
Which error message would be displayed if the SELECT statement in the code snippet fails for reasons other than no data found?
'Error!'
What keyword is used to explicitly raise an exception in PL/SQL code?
RAISE
In the provided PL/SQL code snippet, what action is taken when the total number of courses exceeds 3?
The record insertion is cancelled and an exception is raised.
What happens if 'crno' in the PL/SQL code snippet is equal to 3?
Nothing, the program continues to execute normally.
What is the purpose of the EXCEPTION block in the given PL/SQL program?
To handle the NO_DATA_FOUND exception
What would be the result if the user enters 'Amit' for the value of 'snm' in the PL/SQL code snippet?
The value is accepted and stored in the database.
What is the outcome if a customer with ID 8 exists in the customers table?
The program will display the name and address of the customer
What would be the output if the 'sno' value entered by the user in the PL/SQL code snippet is 10?
'Roll number does not exist' error occurs.
When is the user-defined exception typically used in PL/SQL programs?
To handle specific cases where custom errors may occur
Which block of code in the PL/SQL snippet is responsible for handling exceptions?
'EXCEPTION'
What does the following line in the code accomplish: 'SELECT name, address INTO c_name, c_addr FROM customers WHERE id = c_id;'?
It initializes variables to store the name and address of a customer
In case of an error not specified in the EXCEPTION block, what will happen in the program?
The program will output 'Error!'
What would be displayed if there was no exception raised during the execution of the given PL/SQL code?
'Name: alex' and 'Address: paris'
Learn about handling exceptions in PL/SQL, including common errors like DUP_VAL_ON_INDEX, PROGRAM_ERROR, and ZERO_DIVIDE. Explore how to correctly manage exceptions to ensure smooth program execution.
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