PCEP Error Handling and Debugging 2

Question 1

What happens when a `try` block raises an exception that has no matching `except` clause?

Accepted Answer

Python searches for a matching handler up the call stack

Answer

If no matching `except` clause is found in the current `try` block, Python propagates the exception up the call stack looking for a handler.

Question 2

Which clause in a try/except structure always executes, whether or not an exception occurred?

Accepted Answer

finally

Answer

The `finally` clause always executes regardless of whether an exception was raised or caught.

Question 3

What does the following code print?

try:
    x = 1 / 0
except ZeroDivisionError:
    print('A')
else:
    print('B')
finally:
    print('C')

Accepted Answer

A C

Answer

The `except` block prints 'A' because a ZeroDivisionError is raised, `else` is skipped, and `finally` always prints 'C'.

Question 4

Which built-in exception is raised when an operation receives the correct type but an inappropriate value?

Accepted Answer

ValueError

Answer

`ValueError` is raised when a function receives an argument of the correct type but an invalid value, such as `int('abc')`.

Question 5

What is the output of this code?

try:
    print(1)
    raise ValueError
    print(2)
except ValueError:
    print(3)
print(4)

Accepted Answer

1 3 4

Answer

Python prints 1, then the ValueError is raised skipping print(2), the except block prints 3, and execution continues with print(4).

(PCEP) Certified Entry-Level Python Programmer Practice Test