Certified Professional in Python Programming 1 v1.0
Question 1
Which of the following examples using line breaks and different indentation methods are compliant with PEP 8 recommendations? (Choose two.)
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A.
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B.
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C.
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D.
Answer : AC
Question 2
Look at the following examples of comments and docstrings in Python Select the ones that are useful and compliant with PEP 8 recommendations. (Choose two.)
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A.
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B.
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C.
- D. price = price + 1 # Decrement price by one to compensate for loss.
Answer : BC
Question 3
Select the true statement related to PEP 257.
- A. String literals that occur immediately after another docstring are called attribute docstrings
- B. Attribute docstrings and Additional docstrings are two types of extra docstrings that can be extracted by software tools
- C. String literals that occur in places other than the first statement in a module, function, or class definition can act as documentation. They are recognized by the Python bytecode compiler, and are accessible as runtime object attributes.
- D. String literals that occur immediately after a simple assignment at the top level of a module are called complementary docstrings
Answer : B
Question 4
Select the true statements related to PEP 8 programming recommendations for code writing. (Choose two.)
- A. You should use the not ... is operator (e.g. if not spam is None:), rather than the is not operator (e.g. if spam is not None:), to increase readability.
- B. You should make object type comparisons using the isinstance() method (e.g. if isinstance(obj , int):) instead of comparing types directly (e.g. if type(obj) is type(1)).
- C. You should write code in a way that favors the CPython implementation over PyPy, Cython, and Jython.
- D. You should not write string literals that rely on significant trailing whitespaces, as they may be visually indistinguishable, and certain editors may trim them.
Answer : BD
Question 5
Select the true statements related to PEP 8 naming conventions. (Choose two.)
- A. Function and variable names should be lower-case with words separated by underscores.
- B. You should always use self as the first argument to instance methods, and cls as the first argument to class methods.
- C. Modules should have short names written in CamelCase.
- D. Constants should be written in all lower-case letters with words separated by underscores.
Answer : AB
Question 6
Select the true statement about PEP 8 recommendations related to line breaks and binary operators.
- A. It is recommended that you use line breaks before binary operators to improve code readability
- B. It is permissible to use line breaks before or after a binary operator, as long as the convention is consistent locally. However, for new code, it is recommended that break lines should be used only after binary operators.
- C. It is recommended that you use line breaks after binary operators to improve code readability
- D. There is no specific PEP 8 recommendation related to using line breaks with binary operators
Answer : B
Question 7
Look at the following code snippets and decide which ones follow PEP 8 recommendations for whitespaces in expressions and statements. (Choose two.)
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A.
No whitespace immediately before the opening parenthesis that starts the list of arguments of a function call:
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B.
A whitespace immediately before a comma, semicolon, and colon:
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C.
No whitespace between a trailing comma and a following closing parenthesis:
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D.
A whitespace immediately after the opening parenthesis that starts indexing or slicing:
Answer : AC
Question 8
Which of the following values can be returned by the messagebox.askquestion() method?
- A. "accept" and "cancel"
- B. l and 0
- C. "yes" and "no"
- D. True and False
Answer : C
Question 9
What will happen if the main window is too small to fit all its widgets?
- A. Some widgets may be invisible
- B. The window will be expanded
- C. An exception will be raised
- D. The widgets will be scaled down to fit the window’s size
Answer : D
Question 10
What is true about the unbind() method? (Choose two.)
- A. It is invoked from within the event's object.
- B. It is invoked from within a widget’s object
- C. It needs a widget's object as an argument.
- D. It needs the event name as an argument
Answer : BD
Question 11
If purple can be obtained from mixing red and blue, which color codes represent the two ingredients? (Choose two.)
- A. #FFFFFF
- B. #0000FF
- C. #FF0000
- D. #000000
Answer : BC
Question 12
What is true about the invocation of the cget() method?
- A. It can be used to read widget attributes
- B. It has the same effect as the config() method
- C. It can be used to set new values to widget attributes
- D. It can be replaced with a dictionary-like access manner
Answer : A
Question 13
Which of the following will set the button text’s font to 12 point italics Arial? (Choose two.)
- A. button.ButtonFont('Arial' , '12', 'italic')
- B. button.setfont(('Arial', '12', 'italic'))
- C. button=Button(wnd,font=('Arial', '12', 'italic')
- D. button.config(font=('Arial', '12', 'italic'))
Answer : BD
Question 14
What is true about the unbind_all() method? (Choose two.)
- A. It can be invoked from any widget
- B. It can be invoked from the main window widget only
- C. It is parameterless
- D. It causes all the widgets to disappear
Answer : AC
Question 15
If w is a correctly created main application window, which method would you use to fix both of the main window's dimensions?
- A. w.fixshape()
- B. w.fixdim()
- C. w.resizable()
- D. w.makewindow()
Answer : C