Python Exception Handling Questions and Answers

Question 1

What is the correct order of execution for the blocks in a `try...except...else...finally` statement when no exception occurs within the `try` block?

Accepted Answer

`try` -> `else` -> `finally`

Answer

`try` -> `except` -> `finally`

Answer

`try` -> `finally`

Answer

`try` -> `else`

Question 2

A developer needs to handle both `ValueError` and `TypeError` in the same way. Which of the following code snippets demonstrates the correct syntax for catching multiple specific exceptions in a single `except` block?

Accepted Answer

except (ValueError, TypeError):

Answer

except ValueError, TypeError:

Answer

except [ValueError, TypeError]:

Answer

except ValueError or TypeError:

Question 3

When creating a custom exception class, what is the best practice for the base class from which it should inherit?

Accepted Answer

Inherit from the `Exception` class to avoid catching system-exit events.

Answer

Inherit from the `BaseException` class to catch all possible signals.

Answer

Do not inherit from any class; a standalone class is sufficient.

Answer

Inherit from the `Error` class for semantic clarity.

Question 4

Consider the following code. What will be the final output printed to the console?

```python
def check_value():
    try:
        print("Start")
        raise ValueError
        print("After Raise")
    except ValueError:
        print("Caught")
        return "From Except"
    finally:
        print("Cleanup")
    print("End")

print(check_value())
```

Accepted Answer

Start
Caught
Cleanup
From Except

Answer

Start
Caught
Cleanup
End
From Except

Answer

Start
Caught
From Except
Cleanup

Answer

Start
After Raise
End
None

Question 5

Which of the following statements about the `raise` keyword in Python is true?

Accepted Answer

Using `raise` by itself inside an `except` block re-raises the active exception, preserving its original traceback.

Answer

Using `raise` by itself inside an `except` block is invalid syntax.

Answer

The `raise` keyword can only be used with built-in exception types.

Answer

The `raise` keyword is used to create a new exception class.

Question 6

A function is designed to process a dictionary. If a specific key is not found, the function should stop its normal execution and signal this specific problem to the caller. Which built-in exception is most appropriate to `raise` in this scenario?

Accepted Answer

KeyError

Answer

IndexError

Answer

ValueError

Answer

AttributeError