Python Asynchronous Programming - Practice Questions 2026 - Free Online Course

Master the art of high-performance Python with our comprehensive Python Asyncio & Asynchronous Programming Practice Exams. In today’s software development landscape, writing synchronous, blocking code is no longer enough for scalable applications. Whether you are building web scrapers, high-traffic APIs, or microservices, mastering asynchronous programming is essential. This course is designed to take you from a basic understanding of async and await to a professional level where you can manage complex concurrency with ease.

Why Serious Learners Choose These Practice Exams

These practice exams are crafted for developers who want to move beyond surface-level tutorials. Serious learners choose this course because it mimics the complexity of real-world software engineering. We don't just ask you to identify syntax; we challenge your understanding of event loops, task scheduling, and race conditions. By working through these questions, you bridge the gap between "knowing" the theory and "applying" it in production environments.

Course Structure

Our curriculum is organized into six logical stages to ensure a smooth but rigorous learning curve:

Basics / Foundations: This section ensures you understand the fundamental "why" behind asynchronous programming. You will be tested on the differences between multi-threading, multi-processing, and asynchronous I/O, as well as the syntax of async def.
Core Concepts: Here, we dive into the heart of the asyncio library. You will face questions regarding the Event Loop, Coroutines, and the lifecycle of a Task.
Intermediate Concepts: This stage focuses on synchronization primitives and execution control. Expect questions on asyncio.gather, asyncio.wait, and handling timeouts to prevent hanging processes.
Advanced Concepts: Challenge yourself with low-level details. This includes custom event loop policies, integrating synchronous code using run_in_executor, and deep dives into Future objects and Transports/Protocols.
Real-world Scenarios: Theoretical knowledge meets practical application. Questions here are framed as architectural problems, such as managing database connections asynchronously or building a resilient producer-consumer queue.
Mixed Revision / Final Test: The ultimate benchmark. This comprehensive exam pulls from all previous sections to simulate a high-pressure environment, ensuring you are truly ready for any Python concurrency challenge.

Sample Practice Questions

Question 1

What is the primary difference between asyncio.create_task(coro()) and simply awaiting a coroutine using await coro()?

Option 1: There is no difference; both execute the coroutine immediately and block the loop.
Option 2: await coro() schedules the coroutine as a background task, while create_task waits for it to finish.
Option 3: create_task schedules the coroutine to run concurrently on the event loop, while await coro() pauses the current coroutine until the result is returned.
Option 4: create_task is used for multi-threading, whereas await is used for single-threaded execution.
Option 5: create_task can only be used inside a synchronous function.

Correct Answer: Option 3

Correct Answer Explanation: When you call create_task, the coroutine is wrapped in a Task object and scheduled to run on the event loop as soon as possible. This allows other code to run in the meantime. In contrast, await yields control back to the loop and specifically waits for that one coroutine to complete before moving to the next line of code.

Wrong Answers Explanation:

Option 1 is wrong because await does not block the entire event loop; it only pauses the current coroutine.
Option 2 is wrong because it swaps the definitions; create_task is what enables background scheduling.
Option 4 is wrong because asyncio is fundamentally single-threaded; create_task does not involve threads.
Option 5 is wrong because create_task must be called within an environment where an event loop is already running, typically inside another async function.

Question 2

How does the asyncio.gather(*aws) function behave when one of the passed awaitables raises an exception, assuming return_exceptions=False?

Option 1: It ignores the exception and continues with the remaining awaitables.
Option 2: It immediately cancels all other pending awaitables and re-raises the exception.
Option 3: It waits for all awaitables to finish and then returns a list of exceptions.
Option 4: It raises the exception immediately to the caller, but other awaitables in the group are not automatically cancelled and continue to run.
Option 5: It restarts the event loop to try and recover from the error.

Correct Answer: Option 4

Correct Answer Explanation: By default, if one awaitable in gather fails, the gather() call itself immediately raises that exception. However, significantly, the other awaitables in that group are not cancelled; they continue running in the background.

Wrong Answers Explanation:

Option 1 is wrong because an exception will propagate and interrupt the gather call.
Option 2 is wrong because gather does not perform automatic cancellation of the "sibling" tasks.
Option 3 is wrong because that behavior only occurs if you set the parameter return_exceptions=True.
Option 5 is wrong because the event loop does not restart automatically upon a task exception.

Course Benefits

Welcome to the best practice exams to help you prepare for your Python Asyncio & Asynchronous Programming journey.

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We hope that by now you're convinced! There are a lot more questions inside the course to help you become a master of asynchronous Python.