PCEP-30-02 4.3 Python Built-In Exceptions Hierarchy PCEP-30 Practice Questions (Page 1)

Questions 1–5

1. 1foundation · easy

   Which of the following code snippets would raise a ValueError?

   • Aint('abc')
   • B1 + '1'
   • Cint('123')
   • D[1, 2, 3][5]
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2. 2expert · medium · select all that apply

   A developer is writing a script that uses sys.exit() to terminate early when a configuration file is missing. The developer wants to ensure that the SystemExit exception is not accidentally caught by a broad except clause. Which of the following statements are true? Select all that apply.

   • ASystemExit inherits directly from BaseException.
   • Bsys.exit() raises SystemExit to terminate the program.
   • CCatching Exception will also catch SystemExit.
   • DSystemExit is a subclass of KeyboardInterrupt.
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4. 3foundation · easy

   When is KeyError raised in Python?

   • AWhen a sequence index is out of range.
   • BWhen a numeric operation overflows.
   • CWhen a dictionary key is not found.
   • DWhen a function receives an invalid argument type.
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5. 4expert · medium · select all that apply

   A developer is writing a script that runs an infinite loop until the user presses Ctrl+C. The script should handle the interruption gracefully. Which of the following statements are true? Select all that apply.

   • ACatching Exception will catch KeyboardInterrupt.
   • BKeyboardInterrupt is raised when the user presses Ctrl+C.
   • CKeyboardInterrupt is a direct subclass of BaseException.
   • DKeyboardInterrupt is a subclass of SystemExit.
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6. 5foundation · easy

   What happens when sys.exit() is called in a Python program?

   • AIt raises SystemExit, which terminates the program if not caught.
   • BIt raises a generic Exception that must be handled by the caller.
   • CIt raises KeyboardInterrupt to stop the program execution.
   • DIt immediately halts the interpreter without raising any exception.
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