Madanswer Technologies Interview Questions Data|Agile|DevOPs|Python - Recent questions in Celery

The GroupResult takes a list of AsyncResult instances and has the following operations.

Sun, 19 Jun 2022 04:45:00 +0000

The GroupResult takes a list of AsyncResult instances and has the following operations.

a) join()

b) revoke()

c) ready()

d) successful()

e) All the options

(group(add.s(i, i) for i in xrange(10)) | xsum.s())().get() is an example of

Sun, 19 Jun 2022 04:44:34 +0000

(group(add.s(i, i) for i in xrange(10)) | xsum.s())().get() is an example of

a) chain

b) group

c) chunk

d) chord

Map and star-map differ from group in what ways?

Sun, 19 Jun 2022 04:44:03 +0000

Map and star-map differ from group in what ways?

a) the operation is parallel

b) only one task message is sent AND the operation is sequential

c) only one task message is sent AND the operation is parallel

d) the operation is sequential

e) only one task message is sent

Consider a chain res = chain(add.s(4, 4), mul.s(8), mul.s(10))() where add is defined as a+b and mul is defined as a*b. How can we get intermediate parent results

Sun, 19 Jun 2022 04:43:41 +0000

Consider a chain

res = chain(add.s(4, 4), mul.s(8), mul.s(10))()

where add is defined as a+b and mul is defined as a*b. How can we get intermediate parent results

a) res.parent.parent

b) res.parent.get()

c) res.parent.parent.get()

d) All the options

To divide an iterable work into pieces, use

Sun, 19 Jun 2022 04:43:07 +0000

To divide an iterable work into pieces, use

a) starmap

b) chunks

c) piece

d) chord

Let i = app.control.inspect() To get a list of reserved tasks, use

Sun, 19 Jun 2022 04:42:42 +0000

Let

i = app.control.inspect()

To get a list of reserved tasks, use

a) i.reserved()

b) i.registered()

c) i.scheduled()

d) i.active()

To add a consumer to a queue named q1, use

Sun, 19 Jun 2022 04:42:11 +0000

To add a consumer to a queue named q1, use

a) app.control.add_consumer(‘q1’, reply=True)

b) app.control.add_consumer(‘q1’, reply=False)

c) app.control.add_consumer(‘q1’, reply=True, destination=[‘worker1@gmail.com’])

d) app.control.add_consumer(‘q1’, reply=False, destination=[‘worker1@gmail.com’])

Let i = app.control.inspect() To get a list of registered tasks, use

Sun, 19 Jun 2022 04:41:45 +0000

Let

i = app.control.inspect()

To get a list of registered tasks, use

a) i.registered()

b) i.active()

c) i.scheduled()

d) i.reserved()

e) All the options

What is the default queue in celery

Sun, 19 Jun 2022 04:41:18 +0000

What is the default queue in celery

a) Redis

b) default

c) RabbitMQ

d) celery

To list active queues for the worker w1, use

Sun, 19 Jun 2022 04:40:56 +0000

To list active queues for the worker w1, use

a) app.control.inspect().active_queues()

b) app.control.inspect([‘w1.local’]).active_queues()

c) both

d) None

consider a task T. Write a code to execute in 30 seconds from now, but expires after 3 minutes.

Sun, 19 Jun 2022 04:40:27 +0000

consider a task T. Write a code to execute in 30 seconds from now, but expires after 3 minutes.

a) T.apply_async(countdown=30, expires=180)

b) T.apply_async(countdown=30, expires=3min)

c) T.apply_async(timedelta(seconds=30), expires=180)

d) T.apply_async(countdown=180, expires=30)

If we add the following in celery configuration

Sun, 19 Jun 2022 04:39:52 +0000

If we add the following in celery configuration

task_annotations = {

‘tasks.add’: {‘rate_limit’: ’10/m’}

}

what does it mean

a) mechanism to low prioritize misbehaving queues

b) the task rate limit is set

c) Only 10 tasks of this type can be processed in a minute

d) All the options

celeri multi stores information about workers.

Sun, 19 Jun 2022 04:39:29 +0000

celeri multi stores information about workers.

a) True

b) False

Celery automatically retries sending messages in the event of a connection failure.

Sun, 19 Jun 2022 04:39:07 +0000

Celery automatically retries sending messages in the event of a connection failure.

a) True

b) False

Consider a file tasks.py with:

Sun, 19 Jun 2022 04:38:42 +0000

Consider a file tasks.py with:

@app.task

def add(x, y):

return x + y

After executing:

from tasks import add

What will be the output of:

<<< add.name

a) error

b) tasks.add’

c) name not defined

d) None of the options

Consider a task T. Write the code to execute in 10 seconds from now, specified using ETA.

Sun, 19 Jun 2022 04:38:13 +0000

Consider a task T. Write the code to execute in 10 seconds from now, specified using ETA.

a) T.apply_async(ETA=now + timedelta(seconds=10))

b) T.apply_async(ETA=now + timedelta(10))

c) T.apply_async(eta=now + timedelta(seconds=10))

d) T.apply_async(countdown=10)

Celery has the following defined default result states, except _______.

Sun, 19 Jun 2022 04:37:47 +0000

Celery has the following defined default result states, except _______.

a) STARTED

b) RUNNING

c) PENDING

d) RETRY

Consider the following.

Sun, 19 Jun 2022 04:37:08 +0000

Consider the following.

<<< from celery import Celery

<<< app = Celery()

What does app have?

a) Memory address of the object

b) Name of the current main module

c) Name of the app class

d) All the options

Which of the following calling APIs is/are supported by celery task instances?

Sun, 19 Jun 2022 04:36:43 +0000

Which of the following calling APIs is/are supported by celery task instances?

a) calling

b) delay

c) apply_async

d) All the options

If the following configuration is used, which of the following is used for broker and backend?

Sun, 19 Jun 2022 04:36:10 +0000

If the following configuration is used, which of the following is used for broker and backend?

broker_url = ‘pyamqp://’

result_backend = ‘rpc://’.

a) Broker is Redis, backend is RabbitMQ

b) Both broker and backend are RabbitMQ

c) Both broker and backend are Redis

d) Broker is RabbitMQ, backend is Redis

If a task raises an exception, we can override it using __________.

Sun, 19 Jun 2022 04:35:38 +0000

If a task raises an exception, we can override it using __________.

a) result.get(propagate=True)

b) result.get(propagate=False)

c) result.get(exception=True)

d) result.get(exception=False)

If app=celery(), task is created using _______ decorator.

Sun, 19 Jun 2022 04:35:16 +0000

If app=celery(), task is created using _______ decorator.

a) app

b) @app.task

c) @task.app

d) All the options

Name the broker in the following.

Sun, 19 Jun 2022 04:34:53 +0000

Name the broker in the following.

app = Celery(‘tasks’, broker=’pyamqp://guest@localhost//’).

a) Redis

b) RabbitMQ

c) Amazon SQS

d) None of the options

Using rpc:// result backend, two processes can wait for the same result.

Sun, 19 Jun 2022 04:34:31 +0000

Using rpc:// result backend, two processes can wait for the same result.

a) True

b) False

Celery protocol can be implemented in any language.

Sun, 19 Jun 2022 04:34:05 +0000

Celery protocol can be implemented in any language.

a) True

b) False

A client process ___________.

Sun, 19 Jun 2022 04:33:41 +0000

A client process ___________.

a) subscribes to task queues to perform work

b) puts work requests into queues

c) puts work requests into queues and fetches results from the backend

d) fetches results from the backend

e) All the options

To run RabbitMQ in the background, use ________.

Sun, 19 Jun 2022 04:33:14 +0000

To run RabbitMQ in the background, use ________.

a) $ sudo rabbitmq-server -background

b) $ sudo rabbitmq-server -b

c) $ sudo rabbitmq-server -detached

d) $ sudo rabbitmq-server -attach

Celery is a package available in __________.

Sun, 19 Jun 2022 04:32:39 +0000

Celery is a package available in __________.

a) Pandas

b) NumPy

c) PyPI

d) SciPy

Celery Interview Multiple Choice Questions and Answers with Explanation

Thu, 16 Jun 2022 03:20:16 +0000

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