Module 25: Exception Handling Check

Question 1

What is the primary purpose of using a try...except block in Python?

• To speed up code execution.
• To handle potential errors gracefully without crashing the program.
• To define new types of errors.
• To repeat a block of code multiple times.

Question 2

Consider the following code:
try:
  result = 10 / 0
except ZeroDivisionError:
  print("Cannot divide by zero!")
What will be printed?

• Nothing will be printed.
• The program will crash with a ZeroDivisionError.
• Cannot divide by zero!
• 0

Question 3

Which keyword is used to specify a block of code that will always execute, regardless of whether an error occurred in the `try` block or not (assuming it's present)?

• except
• else (in a try/except context)
• finally
• always

Question 4

If you want to catch a specific type of error, like a ValueError, how should you write the `except` block?

• except Error:
• except:
• catch ValueError:
• except ValueError:

Question 5

What happens if an error occurs inside a `try` block, but there is no corresponding `except` block to handle that specific type of error (and no general `except` block)?

• The error is ignored, and the program continues after the `try...except` block.
• The program stops execution (crashes) and displays the error message.
• The `finally` block (if present) is skipped.
• Python automatically creates a suitable `except` block.

Question 6

Consider this code:
try:
  num = int(input("Enter a number: "))
  print("You entered:", num)
except ValueError:
  print("Invalid input!")
What will happen if the user enters the text "hello"?

• The program will crash with a ValueError.
• It will print "Invalid input!".
• It will print "You entered: hello".
• It will print "You entered: 0".

Question 7

Which built-in Python exception is typically raised when you try to open a file that does not exist in read mode ('r')?

• IOError
• ValueError
• FileNotFoundError
• TypeError

Question 8

What is the main benefit of handling exceptions rather than letting the program crash?

• It makes the code shorter.
• It improves program robustness and provides a better user experience.
• It allows the use of the `finally` keyword.
• It automatically fixes the errors in the code.

Question 9

How can you handle multiple specific exceptions with the same block of code?

• Use multiple `except:` lines, one after the other.
• except ValueError and TypeError:
• except (ValueError, TypeError):
• This is not possible; each exception needs its own `except` block.

Question 10

If no error occurs in the `try` block, what happens with the `except` block?

• The `except` block is executed anyway.
• The `except` block is skipped.
• Python asks the user if the `except` block should run.
• The program raises a `NoErrorOccurred` exception.