PCPP-32-101 1.12 Explain the Concept of Metaprogramming PCPP-32-1 Practice Questions (Page 5)

Questions 21–25

1. 21application · easy

   A developer is writing a logging utility that needs to record the type of an exception. The utility receives an exception instance and must log the class name of the exception. Which code snippet correctly retrieves the exception's class name?

   • A`exc.__class__.__name__`
   • B`exc.__name__`
   • C`type(exc).__dict__['__name__']`
   • D`exc.__bases__[0].__name__`
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2. 22application · medium

   A developer needs to create a series of simple data-holder classes at runtime based on a configuration file. Each class should have a name derived from a string in the config, and each should contain only a set of predefined attributes with default values. The developer wants to avoid writing repetitive class definitions in source code. Which approach is most appropriate?

   • AUse `exec()` with a template string for each class definition.
   • BUse a dictionary to store class names and attributes, then access them via `globals()`.
   • CUse `eval()` to execute a string that defines each class.
   • DUse `type(class_name, (object,), {'attr1': default1, 'attr2': default2})` for each entry in the config.
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4. 23application · easy

   A developer is writing a debugging tool that prints the name of the class and the names of its methods. The tool receives a class object. Which code snippet correctly prints the class name?

   • A`print(SomeClass.__class__.__name__)`
   • B`print(SomeClass.__dict__['__name__'])`
   • C`print(SomeClass.__bases__[0].__name__)`
   • D`print(SomeClass.__name__)`
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5. 24application · easy

   A developer is writing a debugging utility that prints the name of the class that an object belongs to. The utility receives an arbitrary object and must display the class name in a log message. Which code snippet correctly retrieves the class name?

   • A`obj.__class__.__name__`
   • B`obj.__bases__[0].__name__`
   • C`type(obj).__dict__['__name__']`
   • D`obj.__name__`
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6. 25foundation · easy

   Given the following code, what is the output? class MyClass: x = 10 def method(self): pass print('x' in MyClass.__dict__)

   • ATrue
   • B10
   • CNone
   • DFalse
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