1. What is a key feature of Python that makes it easy to debug code?
Answer: Its readable and clear syntax.
2. Name three common applications of Python.
Answer: Web development, data analysis, and automation.
3. Provide an example of a valid Python variable name.
Answer: `user_name`
4. What is an identifier in Python?
Answer: The name used to identify variables, functions, classes, modules, or objects.
5. Which keyword in Python cannot be used as an identifier?
Answer: `class`
6. What is the correct syntax to add a comment in Python?
Answer: Use the hash symbol `#` followed by the comment.
7. Name one Python keyword used for looping.
Answer: `for`
8. Provide an example of a Python literal.
Answer: `42` (an integer literal)
9. Which function is used to convert data types in Python?
Answer: `int()`, `float()`, `str()`, etc.
10. What type does the expression type(3.14) return?
Answer: `<class 'float'>`
11. Which symbol is used for exponentiation in Python?
Answer: `**`
12. What is the correct order of operations in Python expressions?
Answer: Parentheses > Exponentiation > Multiplication/Division > Addition/Subtraction (PEMDAS)
13. What is the purpose of the print() function in Python?
Answer: To display output to the console.
14. How do you define a function in Python?
Answer: Using the `def` keyword, e.g., `def my_function():`
15. How do you call a function named my_function in Python?
Answer: Use `my_function()`
16. What does 'call by reference' mean in Python?
Answer: It means functions receive references to the objects passed, not copies.
17. Which type of argument is mandatory in a Python function?
Answer: Positional arguments.
18. Which argument type assigns a default value in Python?
Answer: Default arguments.
19. Which argument type allows you to pass unlimited arguments to a function?
Answer: `*args` or `**kwargs`
20. Name a built-in Python function used to display output.
Answer: `print()`
21. Which keyword is used for decision-making in Python?
Answer: `if`
22. What is the purpose of the else statement in Python?
Answer: To execute a block of code if the condition in `if` is false.
23. Which loop structure is best suited for iterating a fixed number of times?
Answer: `for` loop.
24. Which loop executes as long as a condition is true?
Answer: `while` loop.
25. Which Python statement is used to exit a loop immediately?
Answer: `break`
26. Which Python statement skips the remaining code in a loop iteration?
Answer: `continue`
27. What is the purpose of the pass statement in Python?
Answer: To act as a placeholder where code is syntactically required but not needed yet.
28. What is a nested loop in Python?
Answer: A loop inside another loop.
29. What happens if the else block is used with a for loop that completes normally?
Answer: The `else` block is executed.
30. What happens if the else block is used with a while loop that exits normally?
Answer: The `else` block is executed.
31. What will print(type("Hello")) display in Python?
Answer: `<class 'str'>`
32. What is the result of the expression 3+2 2 in Python?
Answer: SyntaxError (missing operator between `2` and `2`)
33. Name one mutable data type in Python.
Answer: List (`list`) is mutable.
34. What is the result of the expression 5//2 in Python?
Answer: `2` (floor division)
35. Which operator is used to check equality in Python?
Answer: `==`
36. Which keyword is used to define a function in Python?
Answer: `def`
37. Which of the following is not a valid Python data type: dict, set, array, or tuple?
Answer: `array` (not a core built-in type without importing `array` module)
38. What is the result of not True in Python?
Answer: `False`
39. Which keyword is used to import a module in Python?
Answer: `import`
40. Which operator is used to concatenate strings in Python?
Answer: `+`
