Python Functions - Practice Questions 2026

Mastering Python Functions is the most critical step in transitioning from a beginner coder to a professional developer. Functions are the building blocks of clean, reusable, and efficient code. This comprehensive practice exam suite is designed to push your understanding of Python functions to the limit, ensuring you are ready for technical interviews, certification exams, and real-world software development.

Why Serious Learners Choose These Practice Exams

Serious learners understand that watching tutorials is not enough. To truly master Python, you must engage in active recall and problem-solving. These exams are curated to challenge your logic, syntax knowledge, and ability to debug complex scenarios. We provide a massive bank of original questions that go beyond simple "print" statements, forcing you to think about memory management, scope, and functional programming paradigms.

Course Structure

This practice course is organized into logical tiers to help you build your skills progressively.

• Basics / Foundations: Focuses on the fundamental syntax of defining and calling functions. You will be tested on the def keyword, naming conventions, and simple return statements.

• Core Concepts: Covers positional and keyword arguments, default parameters, and the difference between local and global scope. This section ensures your "mental compiler" understands how Python passes data.

• Intermediate Concepts: Dives deeper into packing and unpacking arguments using *args and **kwargs. You will also explore lambda functions and nested functions.

• Advanced Concepts: Challenges you with decorators, closures, recursion, and generator functions using the yield keyword. These are the topics that separate junior developers from seniors.

• Real-world Scenarios: Contextual problems where you must decide the best function structure to solve a specific business logic or data processing task.

• Mixed Revision / Final Test: A comprehensive simulation of a professional assessment, pulling questions from all previous levels to test your overall retention and speed.

Sample Practice Questions

Question 1

What is the output of the following code snippet?

Python

def calculate_power(base, exponent=2):

    return base ** exponent

print(calculate_power(exponent=3, base=2))

• Option 1: 4

• Option 2: 8

• Option 3: 9

• Option 4: TypeError: multiple values for argument

• Option 5: None

Correct Answer: 8

Correct Answer Explanation: In Python, keyword arguments allow you to pass values to a function in any order as long as you specify the parameter names. Here, base is assigned 2 and exponent is assigned 3. The calculation is 2 to the power of 3, which equals 8.

Wrong Answers Explanation:

• Option 1: This would be the result if the default value for exponent (2) was used, but the keyword argument 3 overrides it.

• Option 3: This would occur if the values were swapped (3 to the power of 2), which does not happen here because the labels are explicit.

• Option 4: A TypeError only occurs if you provide multiple values for the same parameter or use positional arguments after keyword arguments.

• Option 5: The function explicitly returns a value, so it cannot be None.

Question 2

Consider the following code involving global and local scope. What will be printed?

Python

x = 10

def modify_value():

    x = 20

    return x

modify_value()

print(x)

• Option 1: 20

• Option 2: 10

• Option 3: UnboundLocalError

• Option 4: 30

• Option 5: NameError

Correct Answer: 10

Correct Answer Explanation: Inside the function modify_value, the assignment x = 20 creates a new local variable named x. It does not modify the global variable x defined outside the function. Therefore, when print(x) is called outside the function, it refers to the global variable which remains 10.

Wrong Answers Explanation:

• Option 1: This would be correct only if the function used the global x keyword to modify the outer variable.

• Option 3: This error occurs if you try to reference a local variable before it is assigned; here, the assignment happens correctly.

• Option 4: There is no addition logic in the code to result in 30.

• Option 5: A NameError is not triggered because x is clearly defined in the global scope.

What You Get With This Course

Welcome to the best practice exams to help you prepare for your Python Functions. We provide a premium learning environment to ensure your success.

• You can retake the exams as many times as you want to reinforce your knowledge.

• This is a huge original question bank designed by experts.

• You get support from instructors if you have questions regarding any logic.

• Each question has a detailed explanation to ensure you learn from your mistakes.

• Mobile-compatible with the Udemy app so you can study on the go.

• 30-days money-back guarantee if you are not satisfied with the content quality.

We hope that by now you are convinced! And there are a lot more questions inside the course. Start your journey to Python mastery today.