Python Exception Quiz

What is an exception in Python?

• c) A data type in Python

• d) A method to handle missing values

• b) A signal that an error has occurred

• a) A function that returns an error

Answer explanation

An exception in Python is b) a signal that an error has occurred. It indicates that something unexpected happened during program execution, allowing developers to handle errors gracefully.

Which of the following keywords is used to handle exceptions in Python?

• c) exception

• a) try

• b) error

• d) raise

Answer explanation

In Python, the 'try' keyword is used to handle exceptions. It allows you to write code that can catch and respond to errors gracefully, making it the correct choice for exception handling.

Which block is executed regardless of whether an exception occurs or not?

• a) else

• b) except

• c) finally

• d) raise

Answer explanation

The 'finally' block is executed after the try and except blocks, regardless of whether an exception was raised or not. This ensures that cleanup code runs in all scenarios, making 'finally' the correct choice.

What will happen if an exception is not handled in Python?

• c) The program will fix the error

• a) The program will run normally

• d) Python will continue running the next line

• b) The program will crash

Answer explanation

If an exception is not handled in Python, the program will crash, terminating execution and displaying an error message. Thus, the correct answer is b) The program will crash.

Which of the following is used to manually throw an exception in Python?

• a) throw

• b) trigger

• c) raise

• d) throwError

Answer explanation

In Python, the 'raise' statement is used to manually throw an exception. The other options, 'throw', 'trigger', and 'throwError', are not valid keywords for this purpose.

What exception will this code raise? `x = int("abc")`

• d) IndexError

• c) KeyError

• b) TypeError

• a) ValueError

Answer explanation

The code `x = int("abc")` attempts to convert a non-numeric string to an integer, which is invalid. This raises a ValueError, indicating that the string cannot be interpreted as an integer. Thus, the correct answer is a) ValueError.

What will happen when the following code is executed? `my_list = [1, 2, 3] print(my_list[5])`

• b) KeyError

• a) IndexError

• d) ValueError

• c) TypeError

Answer explanation

The code attempts to access the 6th element (index 5) of a list that only has 3 elements (indices 0, 1, 2). This results in an IndexError, indicating that the index is out of range. Therefore, the correct answer is a) IndexError.

Which exception is raised by this code? `result = 10 / 0`

• a) ValueError

• b) ZeroDivisionError

• c) TypeError

• d) OverflowError

Answer explanation

The code `result = 10 / 0` attempts to divide by zero, which is not allowed in Python. This raises a `ZeroDivisionError`, making option b) the correct choice. Other options do not apply to this specific error.

What exception will this code raise? `my_dict = {"a": 1, "b": 2} print(my_dict["c"])`

• b) IndexError

• a) KeyError

• c) TypeError

• d) ValueError

Answer explanation

The code attempts to access a key 'c' that does not exist in the dictionary. In Python, this raises a KeyError, indicating that the specified key is not found. Therefore, the correct answer is a) KeyError.

What is the purpose of the 'except' block in Python?

• a) To define a function

• b) To handle exceptions

• c) To declare variables

• d) To import modules

Answer explanation

The 'except' block in Python is used to handle exceptions that may occur during the execution of a program. It allows developers to manage errors gracefully, making choice b) the correct answer.