PCEP Certification Practice: Python Built-In BaseException Hierarchy

Question 1: What is the base class for all built-in exceptions in Python?

1. Exception
2. BaseException
3. SyntaxError
4. RuntimeError

Question 2: Which of the following exceptions directly inherit from BaseException? (Choose all that apply)

• KeyboardInterrupt
• SystemExit
• ZeroDivisionError
• GeneratorExit

Question 3: Complete the code to raise a BaseException.

raise ______("This is a base exception.")

Question 4: What will be the output of the following code?

try:
    raise BaseException("Error occurred")
except BaseException as e:
    print(e)

1. Error occurred
2. BaseException: Error occurred
3. An error occurred
4. None

Question 5: Insert the correct code to catch and handle a BaseException.

try:
    raise BaseException("Something went wrong.")
except ______:
    print("Caught a BaseException!")

Question 6: Which of the following statements is true about BaseException in Python?

1. It is used to handle all exceptions.
2. It is the base class for all exceptions, including SystemExit and KeyboardInterrupt.
3. It is commonly used to handle user-defined exceptions.
4. It is a subclass of the Exception class.

Question 7: Which of the following are valid subclasses of BaseException? (Choose all that apply)

1. SystemExit
2. TypeError
3. AssertionError
4. MemoryError

Question 8: Arrange the steps to correctly raise and catch a BaseException.

1. Use raise to raise a BaseException.
2. Use the try block to execute code that may raise an exception.
3. Catch the exception with an except BaseException block.

Question 9: Complete the code to print the exception message when a BaseException is raised.

try:
    raise BaseException("Error occurred!")
except BaseException as ______:
    print(______)

Question 10: What will be the output of the following code?

try:
    raise BaseException("Critical failure!")
except BaseException:
    print("An error was caught.")

1. Critical failure!
2. An error was caught.
3. BaseException: Critical failure!
4. Error

Question 11: Insert the correct code to handle an exception and print its message.

try:
    raise BaseException("Fatal error")
except ______ as error:
    print(error)

Question 12: Which exception is not a direct subclass of BaseException?

1. Exception
2. SystemExit
3. KeyboardInterrupt
4. NameError

Question 13: Which of the following are characteristics of BaseException? (Choose all that apply)

1. It is the root of the exception hierarchy in Python.
2. It should generally not be caught in normal code.
3. It is used for handling standard exceptions like TypeError and ValueError.
4. It has no subclasses.

Question 14: Arrange the steps to handle an exception and print its type.

1. Use try to execute code that may raise an exception.
2. Raise an exception using raise.
3. Catch the exception using except.
4. Print the type of the exception.

Question 15: Complete the code to print the type of the caught exception.

try:
    raise BaseException("Error")
except BaseException as e:
    print(______(e))

Question 16: What will be the output of the following code?

try:
    raise BaseException("Fatal error")
except BaseException as e:
    print(type(e))

1. <class 'BaseException'>
2. <class 'Exception'>
3. Fatal error
4. Error

17. Insert the correct code to ensure that a BaseException is caught and its message is printed.

try:
    raise BaseException("Critical issue")
except ______:
    print("Exception caught!")

Question 18: What happens if a KeyboardInterrupt is raised and not caught in a Python program?

1. The program continues execution.
2. The program ignores the exception.
3. The program terminates.
4. The program restarts.

Question 19: Which of the following exceptions directly inherit from BaseException and typically cause program termination? (Choose all that apply)

1. KeyboardInterrupt
2. SystemExit
3. TypeError
4. GeneratorExit

Question 20: Arrange the steps to raise and handle a KeyboardInterrupt exception.

1. Raise a KeyboardInterrupt.
2. Use a try block for code that may be interrupted.
3. Use an except block to catch the exception.
4. Print a message indicating that the program was interrupted.

Question 21: Complete the code to catch a KeyboardInterrupt and print a message.

try:
    raise KeyboardInterrupt("Program interrupted")
except ______:
    print("KeyboardInterrupt caught")

Question 22: What will be the output of the following code?

try:
    raise SystemExit("Exit program")
except SystemExit as e:
    print("Caught:", e)

1. Exit program
   
2. Caught: Exit program
3. SystemExit: Exit program
4. Program continues

Question 23: Insert the correct code to catch a SystemExit exception.

try:
    raise SystemExit("Exiting now")
except ______ as e:
    print("Caught:", e)

Question 24: What is the role of GeneratorExit in Python?

1. It is raised when a generator function is manually closed.
2. It is raised when a generator runs out of values to yield.
3. It is used to stop the iteration of a loop.
4. It is raised when a generator encounters an error.

Question 25: Which of the following are valid reasons to raise BaseException or its subclasses in Python? (Choose all that apply)

1. To signal critical system-level events like termination or interruption.
2. To handle standard exceptions like ValueError.
3. To exit a program using SystemExit.
4. To handle custom exceptions in user code.