This Python Identifiers Quiz helps you master the rules, conventions, and restrictions related to naming variables, functions, classes, and other elements. Learn what makes a valid Python identifier and avoid common naming mistakes.
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Which of the following is a valid identifier in Python?
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Question 3 of 15
3. Question
Can Python identifiers start with an underscore _?
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Question 4 of 15
4. Question
Which of the following is not a valid Python identifier?
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Question 5 of 15
5. Question
Which characters are allowed in Python identifiers?
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Question 6 of 15
6. Question
Which of the following is the correct way to name a constant in Python (by convention)?
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Question 7 of 15
7. Question
Is __init__ a valid Python identifier?
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Question 8 of 15
8. Question
Which of the following naming styles is commonly used for functions in Python?
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Question 9 of 15
9. Question
Which identifier name would indicate a private variable by convention?
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Question 10 of 15
10. Question
What happens if you use a keyword as an identifier?
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Question 11 of 15
11. Question
Which of the following is a valid class name according to Python naming conventions?
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Question 12 of 15
12. Question
What is the output of the following code?
True = 5 print(True)
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Question 13 of 15
13. Question
Which of the following identifiers implies a special method in Python?
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Question 14 of 15
14. Question
Which naming convention should be used for global variables?
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Question 15 of 15
15. Question
Which function helps check if a string is a valid Python identifier?
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Summary
These MCQs help learners understand the rules and naming conventions of identifiers in Python — including valid characters, keyword restrictions, special methods, and PEP 8 style guidelines. Great for interview prep, coding assessments, and best practices.
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