Syntax Quiz - Languages Python

Free practice quiz: Syntax (Languages Python). 43 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

This Languages Python practice quiz has 43 multiple-choice questions on Syntax, and 43 of them come with an explanation. Try the 5 sample questions below (tap an option to check yourself), then play the full quiz online. No sign-up needed.

Sample questions

1. Which of the following is a valid Python variable name?

   1. 2_variable
   2. _my_var
   3. my-variable
   4. my variable
   Show answer

   Answer: B. _my_var

   Python variable names can start with a letter or an underscore, followed by letters, numbers, or underscores. They cannot start with a number, contain hyphens, or spaces.

2. Which of the following is NOT a Python data type?

   1. float
   2. boolean
   3. string
   4. array
   Show answer

   Answer: D. array

   Python has built-in data types like `float` (for floating-point numbers), `bool` (for boolean values), and `str` (for strings). While Python has lists which are similar to arrays, 'array' itself is not a primary built-in data type in the same way. The `array` module exists for a more C-style array, but 'array' as a general term isn't a fundamental type like `int`, `float`, `str`, `list`, `tuple`, `dict`, `set`.

3. Which of the following is used to define a class in Python?

   1. class
   2. new
   3. define
   4. object
   Show answer

   Answer: A. class

   The `class` keyword is used to declare a new class. It is followed by the class name and a colon. The class body, which contains attributes and methods, is indented.

4. Which of the following is used to create a set in Python?

   1. `my_set = (1, 2, 3)`
   2. `my_set = [1, 2, 3]`
   3. `my_set = {1, 2, 3}`
   4. `my_set = {1: 'a', 2: 'b'}`
   Show answer

   Answer: C. `my_set = {1, 2, 3}`

   Sets in Python are unordered collections of unique elements and are defined using curly braces `{}`. If you use `{}` with key-value pairs, it creates a dictionary. `()` creates a tuple, and `[]` creates a list.

5. What is the result of `bool('')`?

   1. True
   2. False
   3. None
   4. Error
   Show answer

   Answer: B. False

   An empty string (`''`) is considered 'falsy' in Python, so `bool('')` evaluates to `False`.

More questions in this quiz

Answers and explanations are in the full quiz.

1. What is the correct way to declare a constant in Python (though Python doesn't strictly enforce constants)?
2. What does the `pass` statement do in Python?
3. Which of these is NOT a valid Python keyword?
4. What is the result of `print(type(5))`?
5. Which operator is used for exponentiation in Python?
6. What is the correct syntax for a single-line comment in Python?
7. Which of the following is the correct way to assign a tuple to a variable?
8. What keyword is used to define a function in Python?
9. Which of the following is immutable in Python?
10. What is the purpose of the `is` operator in Python?
11. Which indentation level is typically used for code blocks in Python?
12. What does the `del` keyword do in Python?
13. Which of the following is a valid way to create a list in Python?
14. What does the `import` statement do?
15. What is the output of `print(5 // 2)`?
16. What is the Python string method used to convert a string to uppercase?
17. What is the scope of a variable defined inside a function?
18. Which operator is used for membership testing in Python?
19. What is the result of `bool(0)`?
20. Which keyword is used to define a loop that iterates over a sequence?
21. What is the output of `print('5' + 3)`?
22. What does the `elif` keyword do in Python?
23. What is the purpose of the `return` statement in a Python function?
24. Which operator is used for string repetition in Python?
25. What is the output of `print(not True)`?
26. Which keyword is used to create an alias for a module?
27. What is the data type of the result of `5 / 2`?
28. What is the keyword used to define a conditional block that executes if all preceding `if` and `elif` conditions are false?
29. Which method is used to add an item to the end of a list?
30. What is the primary difference between a list and a tuple in Python?
31. Which keyword is used to explicitly raise an exception in Python?
32. What is the correct way to get the length of a string or list?
33. Which symbol is used to denote a block of code in Python?
34. What does the `continue` statement do in a loop?
35. What is the correct way to access the first element of a list called `my_list`?
36. Which of the following is a valid assignment for a boolean value?
37. What is the output of `print('hello' * 2)`?
38. Which of the following is used to define an anonymous function (a function without a name)?

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