Test Your Knowledge On Python Functions and Variables Quiz

1. What will the following code print: print(type(10.5))?

type(10.5) checks the data type of the value 10.5. Since 10.5 has a decimal point, it's a floating-point number, represented as <class 'float'> in Python. Integers (whole numbers) would be <class 'int'>.

Explanation

type(10.5) checks the data type of the value 10.5. Since 10.5 has a decimal point, it's a floating-point number, represented as <class 'float'> in Python. Integers (whole numbers) would be <class 'int'>.

2. What is the keyword used to define a function in Python?

Func

Def

Function

Define

The def keyword signals the start of a function definition. It's followed by the function's name, parentheses that may enclose parameters, and a colon. The indented code block after the colon contains the instructions the function executes. For example: def greet(name): print("Hello, " + name + "!")

Explanation

The def keyword signals the start of a function definition. It's followed by the function's name, parentheses that may enclose parameters, and a colon. The indented code block after the colon contains the instructions the function executes. For example: def greet(name): print("Hello, " + name + "!")

3. How do you assign a value to a variable in Python?

Variable = value

Value -> variable

Variable == value

Value : variable

The equals sign (=) is the assignment operator in Python. It takes the value on the right side and stores it in the variable on the left. For example, age = 25 assigns the integer 25 to the variable named "age."

Explanation

The equals sign (=) is the assignment operator in Python. It takes the value on the right side and stores it in the variable on the left. For example, age = 25 assigns the integer 25 to the variable named "age."

4. What does this code do: my_list = [1, 2, 3]?

Creates a list with three elements

Defines a function named "my_list"

Prints the numbers 1, 2, and 3

Assigns the value 3 to the variable "my_list"

This code creates a list, which is an ordered collection of items. The square brackets [] define the list, and the comma-separated values within are its elements. my_list now holds the integers 1, 2, and 3.

Explanation

This code creates a list, which is an ordered collection of items. The square brackets [] define the list, and the comma-separated values within are its elements. my_list now holds the integers 1, 2, and 3.

5. What does the input() function do?

Prints text to the console.

Waits for the user to type something and returns it as a string.

Generates a random number.

Opens a file.

input() makes your program interactive. It displays an optional prompt to the user, then pauses execution until the user types something and presses Enter. The entered text is captured by the input() function and returned as a string.

Explanation

input() makes your program interactive. It displays an optional prompt to the user, then pauses execution until the user types something and presses Enter. The entered text is captured by the input() function and returned as a string.

6. What is the output of len("Hello")?

4

5

6

Error

The len() function is used to determine the length of a sequence, such as a string. In this case, it counts the characters in the string "Hello", which are 'H', 'e', 'l', 'l', and 'o', totaling 5.

Explanation

The len() function is used to determine the length of a sequence, such as a string. In this case, it counts the characters in the string "Hello", which are 'H', 'e', 'l', 'l', and 'o', totaling 5.

7. What is the scope of a variable defined inside a function?

Global

Local

Universal

External

Variables created within a function have "local" scope, meaning they exist only within that function. Think of it as a function's private workspace. Code outside the function cannot access these variables. This helps prevent naming conflicts in larger programs.

Explanation

Variables created within a function have "local" scope, meaning they exist only within that function. Think of it as a function's private workspace. Code outside the function cannot access these variables. This helps prevent naming conflicts in larger programs.

8. Which of the following is NOT a valid variable name in Python?

My_variable

_variable

123variable

Variable123

Python has rules for naming variables. They must start with a letter (lowercase or uppercase) or an underscore. They cannot start with a number like "123variable", but can include numbers after the first character (e.g., "variable123").

Explanation

Python has rules for naming variables. They must start with a letter (lowercase or uppercase) or an underscore. They cannot start with a number like "123variable", but can include numbers after the first character (e.g., "variable123").

9. What does the return statement do in a function?

Prints a value

Ends the function and specifies the value to send back

Restarts the function

Defines a variable

Return acts like a function's conclusion. It stops the function's execution and can optionally send a value back to where the function was called. This value can be stored in a variable or used directly. Example: def add(x, y): return x + y

Explanation

Return acts like a function's conclusion. It stops the function's execution and can optionally send a value back to where the function was called. This value can be stored in a variable or used directly. Example: def add(x, y): return x + y

10. What is a docstring in Python?

A comment that explains what a piece of code does.

A type of variable.

A way to import modules.

A loop structure.

Docstrings are special comments used to document your code. They are enclosed in triple quotes ("""Docstring goes here"""). When placed within a function, they describe what the function does, its parameters, and what it returns. They aid in code readability and understanding.

Explanation

Docstrings are special comments used to document your code. They are enclosed in triple quotes ("""Docstring goes here"""). When placed within a function, they describe what the function does, its parameters, and what it returns. They aid in code readability and understanding.