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Course Path: Data Science/DATA SCIENTIST'S TOOLBOX/Python Asynchronous Programming

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Intermediate Quiz

1.Multiple threads running on the same CPU core is ______.

  1. Parallelism
  2. Concurrency
  3. Multiprocessing
  4. Asynchronous

Answer: 2)Concurrency

2.asyncio was introduced in _______ version of Python.

  1. 3.6
  2. 3.5
  3. 3.4
  4. 3.7

Answer: 3)3.4

3.asyncio is generally perfect for ___ apps.

  1. Synchronous
  2. IO-bound
  3. CPU-bound
  4. Unstructured network code

Answer: 2)IO-bound

4.asyncio does not scale well.

  1. True
  2. False

Answer: 2)False

5.Which module can be used to implement parallelism in Python3?

  1. await
  2. threading
  3. multiprocessing
  4. asyncio

Answer: 3)multiprocessing

6.Asynchronous programs are always faster.

  1. False
  2. True

Answer: 1)False

7.In purely concurrent programs, only one CPU core is used.

  1. False
  2. True

Answer: 2)True

8.Which module can be used to implement asynchronous communication in Python3?

  1. await
  2. threading
  3. multiprocessing
  4. asyncio

Answer: 4)asyncio

9.In apps using asyncio, who decides when a context switch can be done?

  1. Code
  2. Indeterminate
  3. Random
  4. OS

Answer: 1)Code


Python Asynchronous Programming Handson solution


10.asyncio apps must have at least ________ threads of execution.

  1. 3
  2. 5
  3. 2
  4. 1

Answer: 4)1

11.In asyncio apps, when is context switching done?

  1. Randomly
  2. As decided by OS
  3. Indeterminate
  4. At points defined by code

Answer: 4)At points defined by code

12.In apps using threading, who decides when to do a context switch?

  1. Programmer
  2. OS
  3. App
  4. Random

Answer: 2)OS

13.Name the low-level module on which threading is based.

  1. _thread
  2. thread
  3. _THREAD
  4. _threading

Answer: 1)_thread


asyncio: Final Assessment

1.Name a way in which multiprocessing process can be started.

  1. run
  2. start()
  3. init
  4. spawn

Answer: 4)spawn

2.A callable object in Python must have _______ function.

  1. invoke()
  2. invokable()
  3. callable()
  4. call()

Answer: 4)call()

3.uvloop can be used as a drop-in replacement for the default event loop in asyncio.

  1. False
  2. True

Answer: 2)True

4.The key identifying the type of an asyncio event is ______________.

  1. Event-cat
  2. Event-category
  3. Event-type
  4. type

Answer: 2)True

5.The event loop is the heart of the asyncio app.

  1. False
  2. True

Answer: 2)True

6.Which among the following is not a way to schedule a coroutine for execution?

  1. asyncio.run()
  2. schedule()
  3. create_task()
  4. await

Answer: 2)schedule()

7.uvloop is a part of the standard library.

  1. True
  2. False

Answer: 2)False

8.For a class inheriting Thread, which method can be overridden other than the constructor?

  1. run()
  2. start()
  3. init()
  4. action()

Answer: 1)run()

9.uvloop is distributed under _______ license.

  1. Apache
  2. MIT
  3. GPL
  4. Proprietary

Answer: 2)MIT

10.Forkserver process in multiprocessing is multi-threaded.

  1. False
  2. True

Answer: 1)False


Python Asynchronous Programming Handson solution


11.Just calling a coroutine will cause it to be executed.

  1. False
  2. True

Answer: 1)False

12.Which function is used to run awaitables concurrently in asyncio?

  1. await()
  2. async()
  3. gather()
  4. run()

Answer: 3)gather()

13.What is the full form of GIL?

  1. Global Interactive Length
  2. Global Interpreter Lock
  3. Global Interactive Lock
  4. Global Interpreter Low

Answer: 2)Global Interpreter Lock

14.All resources of the parent process is inherited in the fork method of starting a multiprocessing process.

  1. True
  2. False

Answer: 1)True

15.fork method to start a multiprocessing process works only in UNIX-based systems. True or false?

  1. False
  2. True

Answer: 1)False

16.Which module can be used to implement concurrency in Python 3?

  1. asyncio
  2. multiprocessing
  3. threading
  4. await

Answer: 3)threading

17.Which method is executed when the start() method of a thread object is called?

  1. __run__()
  2. run()
  3. start()
  4. init()

Answer: 2)run()

18.An asyncio future represents an eventual result.

  1. True
  2. False

Answer: 1)True

19.ASGI stands for ______________________.

  1. Asynchronous Server Gate Interface
  2. Asynchronous Serving Gate Interface
  3. Asynchronously Serving Gateway Interface
  4. Asynchronous Server Gateway Interface

Answer: 4)Asynchronous Server Gateway Interface

20.What is the biggest limitation of Cpython?

  1. Asynchronous Server Gate Interface
  2. Threads
  3. GIL
  4. Subprocesses

Answer: 3)GIL


Python Asynchronous Programming Handson solution


21.Name the default method to start a multiprocessing process in Linux.

  1. spawn
  2. init
  3. forkserver
  4. fork

Answer: 4)fork

22.Ideally, how many times should asyncio.run() be called?

  1. shouldn’t be called.
  2. two
  3. one
  4. three

Answer: 3)one

23.set_start_method() can be called more than once in the same program.

  1. True
  2. False

Answer: 2)False

24.WSGI also supports asynchronous apps.

  1. True
  2. False

Answer: 2)False

25.Name the method of starting a multiprocessing process which is not available in UNIX-based systems.

  1. Forkserver
  2. Spawn
  3. All the options
  4. Fork

Answer: 2)Spawn

26.Which is the method used to change the default way to create child processes in multiprocessing?

  1. start_method()
  2. set_method()
  3. reset_start_method()
  4. set_start_method()

Answer: 4)set_start_method()

27.uvloop will also work on Python 2.0

  1. True
  2. False

Answer: 2)False

28.ASGI is a specification.

  1. True
  2. False

Answer: 1)True

29.Name the reference implementation of Python.

  1. IronPython
  2. Jpython
  3. Jython
  4. Cpython

Answer: 4)Cpython

30.ASGI also supports WSGI apps.

  1. False
  2. True

Answer: 2)True

31.Name the default method to start a multiprocessing process in Windows.

  1. fork
  2. spawn
  3. init()
  4. forkserver

Answer: 2)spawn

32.asyncio coroutines are declared using _______.

  1. decorator
  2. def
  3. async/await
  4. function

Answer: 3)async/await

33.In ________ method, a server is created to start a multiprocessing process.

  1. Fork
  2. Spawnserver
  3. Spawn
  4. Forkserver

Answer: 4)Forkserver

34.Uvicorn is an implementation of ASGI.

  1. False
  2. True

Answer: 2)True

35.Events are being sent as _________.

  1. Arrays
  2. Dictionaries
  3. Lists
  4. Tuples

Answer: 2)Dictionaries

36.WSGI apps can also run ASGI apps.

  1. True
  2. False
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