How Well Have You Mastered Asyncio?

Gensen Huang

Created 6/26/2024

77.33%

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Sources

https://medium.com/pythoniq/master-asyncio-in-python-a-comprehensive-step-by-step-guide-4fc2cfa49925

Test your knowledge of asyncio with this quiz and see how many correct answers you can get out of 15!

1. What is the main role of an event loop in asyncio?

To define coroutines

To manage synchronous tasks

To schedule and manage tasks, handle I/O operations and coordinate coroutines

To execute blocking operations

2. What keyword is used to define a coroutine in asyncio?

async def

await def

coroutine def

def async

3. Which function is used to run a coroutine in asyncio?

async.run()

asyncio.start()

await.run()

asyncio.run()

4. How do you pause a coroutine and allow other tasks to run?

use await keyword

use async keyword

use pause keyword

use yield keyword

5. What function is used to run multiple coroutines concurrently?

asyncio.run_all()

asyncio.concurrent()

asyncio.gather()

asyncio.parallel()

6. How do you create a task for a coroutine in asyncio?

asyncio.new_task()

asyncio.create_task()

asyncio.task()

asyncio.run_task()

7. What is the behavior of the asyncio.sleep() function?

Suspends a coroutine for a given number of seconds

Runs a coroutine immediately

Stops the event loop

Pauses the event loop indefinitely

8. What exception is raised if an asyncio task times out using asyncio.wait_for()?

asyncio.TimeoutError

asyncio.CancelledError

asyncio.TaskError

asyncio.TimeoutException

9. Which function is used to start an asyncio server?

asyncio.run_server()

asyncio.start_server()

asyncio.begin_server()

asyncio.serve()

10. Which library is commonly used with asyncio for HTTP clients and servers?

httpio

httplib

aiohttp

requests

11. What should you do to debug asyncio applications effectively?

Use asyncio.run() with debug=True

Set PYTHONASYNCIODEBUG environment variable to 1

Install asyncio debugger

Use traceback exception handler

12. What is the recommended Python version to use asyncio without needing a third-party library?

Python 2.7

Python 3.4

Python 3.6

Python 3.7 or higher

13. How do you handle exceptions in an asyncio coroutine?

Using try and catch blocks

Using try and except blocks

Using try and handle functions

Using try and error blocks

14. Which function is used to set a timeout for asynchronous operations?

asyncio.set_timeout()

asyncio.timeout()

asyncio.wait_timeout()

asyncio.wait_for()

15. How can you profile an asyncio application?

Using asyncio.profile()

Using Python’s cProfile module

Using asyncio's built-in profiler

Using the asyncio debug mode only

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