Concurrent Futures Interview Questions

Super Fast Python
0 ratings

How well do you know
Python Concurrent Futures?

The concurrent.futures module provides the ability to launch parallel and concurrent tasks in Python using thread and process-based concurrency.

Importantly, the ThreadPoolExecutor and ProcessPoolExecutor offer the same modern interface with asynchronous tasks, Future objects, and the ability to wait on groups of tasks.

The problem is that few developers know about it, let alone, how to use it well.

The concurrent.futures module with the ThreadPoolExecutor and ProcessPoolExecutor classes offers the best way to execute ad hoc tasks concurrently in Python.

  • Do you know how to handle task results in the order tasks finish?
  • Do you know how to wait for the first task to fail?
  • Do you know how many workers are created by default?

Discover 130+ interview questions on Python concurrent.futures.

  • Study the questions and answers and improve your skill.
  • Test yourself to see what you really know, and what you don't.
  • Select questions to interview developers on a new role.

Prepare for an interview or test your Python concurrent.futures skills today.

What topics are covered?

This book provides a large number of questions on what, how, and when to use the Python concurrent.futures API.

The questions are divided into major topics, they are:

  • Threads
  • Global Interpreter Lock
  • Processes
  • Threads vs Processes
  • Blocking Calls
  • Executors
  • Executor Shutdown
  • Submit Tasks
  • Map Tasks
  • Future Objects
  • Future Result
  • Future Status
  • Done Callback Functions
  • As Completed
  • Wait
  • ThreadPoolExecutor
  • ProcessPoolExecutor

Each topic has a preamble summarizing the types of questions to expect for the topic and why they are important.

Each question is listed in a heading format so that you can read it and think about it for self-study. This is followed by the answer.

Sometimes the answers will provide additional clarifying information and sample code.

Those questions that require a code example will provide a full code listing in the answer that may be used as a guide.

Who Is Book This For?

Let's make sure you're in the right place.

Specifically, this book is for:

  • Developers that want to learn the concurrent.futures API with pointed questions.
  • Developers that want to test their knowledge of the concurrent.futures API.
  • Engineering managers that want to evaluate candidates for a job that requires Python concurrent.futures.

How to Read

If you are a Python developer looking to learn the concurrent.futures module API, I recommend working through the book sequentially from start to finish. You can pick and choose topics if you need to brush up on specific areas.

If you are a Python developer looking to test your knowledge, I would recommend working through questions one at a time. All questions are listed in the table of contents, which you can use to test your knowledge. Record your answers, then compare your answers to the answers provided later in the book.

If you are an engineering manager, I recommend selecting a sample of questions from the book to ask in a technical interview. Perhaps select some general knowledge questions as well as some questions that require a code listing that could be prepared on paper, a google doc, or a whiteboard. The questions in the book may also be combined, remixed, or used to inspire your own questions.

What Version of Python is Used?

All code examples use Python 3.

Python 3.9+ to be exact.

Python 2.7 is not supported because it reached the end of life in 2020.

What Format Is the Ebook?
(pdf and epub)

The ebook is provided in 2 formats:

  • PDF (.pdf): perfect for reading on the screen or tablet.
  • EPub (.epub): perfect for reading on a tablet with a Kindle or iBooks app.

How Many Pages Is The Book?

65 pages

The PDF has 65 US letter size pages.

Can I Print The Book?


Although, I think it's better to work through it on the screen.

  • You can search, skip, and jump around really fast.
  • You can copy and paste code examples.
  • You can compare code output directly.

Is There Digital Rights Management (DRM)?


Do I Get Free Updates to the Code and Book?


Each time I release an updated version, I will send you an email with a link so that you can download the latest version for free.

Happiness Guarantee

I want you to be happy, and I stand behind my materials.

If you decide that Python concurrency is not for you, or whatever reason, I'll understand.

I offer a 100% money-back guarantee, no questions asked.

Get in touch at:

Can I Buy The Book Elsewhere?


Can I Read a Sample?


You can read a book sample via google books "preview or via the amazon "look inside" feature:

Any Questions?

Contact me directly, any time about this book or Python concurrency generally.

I'm here to help as best I can.

You can send an email directly to my inbox via:

Praise for Super Fast Python

What Are You Waiting For?

Stop reading outdated StackOverflow answers.

Learn Python concurrency correctly, step-by-step.

Start today.

Buy now and get your copy in seconds!

I want this!

You'll get a .zip download containing both ebook formats (pdf and epub).

YES, every question
Powered by