PCEP Certification Practice: Ordering except branches in Python

Question 1: What is the correct order for multiple except branches when handling exceptions in Python?

1. More specific exceptions should come before more general exceptions.
2. The order of except branches doesn't matter.
3. More general exceptions should come before more specific exceptions.
4. Exceptions should be ordered alphabetically.

Question 2: Which of the following are correct practices for ordering except branches in Python? (Select all that apply.)

• Place except Exception: after more specific exceptions like ZeroDivisionError.
• More specific exceptions should be handled before more general ones.
• General exceptions should be placed before specific exceptions.
• The order of except blocks is not important.

Question 3: In Python, except ___________: should come before except Exception: when ordering except branches.

1. ValueError
2. KeyError
3. Both of the above

Question 4: More specific exceptions like IndexError should come before general exceptions like __________ in the except branches.

Question 5: Fill in the blank to correctly order the except branches for handling specific exceptions before general exceptions:

try:
    result = int(input("Enter a number: ")) / 0
except __________:
    print("Division by zero!")
except Exception:
    print("An error occurred")

Question 6: What happens if a more general except block is placed before a more specific one?

1. Python will raise a SyntaxError.
2. Python will raise a TypeError.
3. The more general except block will catch all exceptions, and the specific ones will never be executed.
4. Python will execute all except blocks in order.

Question 7: Insert the correct specific exception before the general Exception in the following code:

try:
    result = int(input("Enter a number: "))
except __________:
    print("Invalid number!")
except Exception:
    print("An error occurred")

Question 8: Which of the following statements are correct regarding exception ordering? (Select all that apply.)

1. except Exception: should come last when ordering except branches.
2. Placing except Exception: before more specific exceptions will prevent those specific exceptions from being handled.
3. except Exception: should always be placed before except ValueError:.
4. All except blocks should be ordered based on specificity, from most specific to most general.

Question 9: In Python, the _________ exception is more general than ValueError and should come after it in the except block order.

• TypeError
• Exception
• KeyError

Question 10: In an exception handling structure, the most general exception should be placed at the end, such as __________, which catches almost all exceptions.

Question 11: Arrange the following exceptions in the correct order of specificity, from most specific to most general.

1. ValueError
2. Exception
3. ZeroDivisionError

Question 12: Which of the following exceptions are more specific than Exception and should be handled before it? (Select all that apply.)

1. KeyError
2. ValueError
3. TypeError
4. SystemExit

Question 13: In a series of except blocks, the _________ block should be placed last as it will catch almost all exceptions.

1. finally
2. except Exception:
3. else

Question 14: The except ___________: block should be placed after all more specific exceptions like ValueError and TypeError to ensure correct exception handling.

Question 15: Fill in the blank to order the except branches correctly, with the specific exception TypeError coming before the general exception:

try:
    result = "text" + 5
except __________:
    print("Type error!")
except Exception:
    print("Some other error occurred")

Question 16: What happens if an except Exception: block is placed before except ValueError:?

1. Both except blocks will execute if a ValueError occurs.
2. The except Exception: block will catch the ValueError, and except ValueError: will not execute.
3. Python will raise a SyntaxError.
4. The except ValueError: block will execute first.

Question 17: Insert the correct code to catch a ValueError before catching the general Exception in the following code:

try:
    result = int("text")
except __________:
    print("Value error!")
except Exception:
    print("An error occurred")

Question 18: Which of the following practices should be followed when ordering except branches? (Select all that apply.)

1. Place more specific exceptions like KeyError before general ones like Exception.
2. Always catch specific exceptions before general ones.
3. Place except Exception: at the start of the except block sequence.
4. General exceptions should be placed last in the except block sequence.

Question 19: In Python, the _________ exception is more general than TypeError and should come after it in the except block order.

1. ValueError
2. Exception
3. KeyError

Question 20: In a multi-branch except structure, the general except __________: block must be placed after specific exceptions to ensure the specific ones are handled first.

Question 21: Sort the following exceptions from most specific to most general in the Python exception hierarchy.

1. KeyError
2. ValueError
3. Exception

Question 22: Which of the following exceptions should come before except Exception: when ordering except branches? (Select all that apply.)

1. IndexError
2. TypeError
3. KeyError
4. SystemExit

Question 23: The exception _________ should be placed after ValueError when handling exceptions in a multi-branch except structure.

1. KeyError
2. Exception
3. TypeError

Question 24: Fill in the blank to correctly order the except branches with the general exception last:

try:
    result = my_dict["missing_key"]
except __________:
    print("Key not found!")
except Exception:
    print("An error occurred")

Question 25: Which exception should be placed last in a multi-branch except structure?

1. IndexError
2. ValueError
3. Exception
4. TypeError