PCEP Error Handling and Debugging 3

Question 1

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

Accepted Answer

BaseException

Answer

`BaseException` is the base class for all built-in exceptions, while `Exception` is a subclass of `BaseException` used for most non-system-exiting exceptions.

Question 2

What does `raise` without any arguments do inside an `except` block?

Accepted Answer

Re-raises the currently handled exception

Answer

A bare `raise` statement inside an `except` block re-raises the exception currently being handled.

Question 3

Which of the following correctly catches multiple exception types in a single except clause?

Accepted Answer

except (ValueError, TypeError):

Answer

Multiple exception types are caught by placing them in a tuple: `except (ValueError, TypeError):`.

Question 4

What exception is raised when a variable is referenced before it has been assigned a value?

Accepted Answer

NameError

Answer

`NameError` is raised when a local or global name cannot be found, which includes using a variable before assigning it.

Question 5

What is the result of this code?

def f():
    try:
        return 1
    finally:
        return 2

print(f())

Accepted Answer

2

Answer

When both `try` and `finally` contain `return`, the `finally` block's `return` overrides the `try` block's `return`.

(PCEP) Certified Entry-Level Python Programmer Practice Test

(PCEP) Certified Entry-Level Python Programmer Practice Test

PCEP Error Handling and Debugging 3