Why background processing improves performance in Ruby on Rails - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to enqueue a job for background processing in Rails.

Ruby on Rails

MyJob.perform_[1](user.id)

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Alater

Bnow

Csync

Dimmediately

Attempts:

3 left

💡 Hint

Common Mistakes

Using perform_now runs the job immediately, blocking the request.

Using perform_later enqueues the job to run in the background, improving app responsiveness.

2fill in blank

medium

Complete the code to define a background job class in Rails.

Ruby on Rails

class MyJob < ApplicationJob
  queue_as :[1]

  def perform(user_id)
    # job code here
  end
end

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Afast

Bdefault

Curgent

Dimmediate

Attempts:

3 left

💡 Hint

Common Mistakes

Using non-existent queue names causes jobs to fail.

The default queue name is :default, which is the standard queue for jobs.

3fill in blank

hard

Fix the error in the code to correctly enqueue a job asynchronously.

Ruby on Rails

MyJob.[1](user.id)

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Aperform_later

Benqueue

Cperform_now

Drun

Attempts:

3 left

💡 Hint

Common Mistakes

Using perform_now runs the job immediately, blocking the request.

perform_later is the correct method to enqueue a job for background processing.

4fill in blank

hard

Fill both blanks to create a hash that maps job names to their queue priorities.

Ruby on Rails

job_queues = { :[1] => :high, :[2] => :low }

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Aemail_job

Bimage_processing

Cdefault

Dcleanup

Attempts:

3 left

💡 Hint

Common Mistakes

Using strings instead of symbols for keys.

Common job names like :email_job and :cleanup can be assigned different queue priorities.

5fill in blank

hard

Fill all three blanks to complete the code that schedules a job with a delay and logs the job status.

Ruby on Rails

MyJob.set(wait: [1]).perform_later(user.id)
logger.[2]("Job scheduled")
status = job.[3]

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A5.minutes

Binfo

Cstatus

D10.seconds

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect delay syntax or logger method.

Use set(wait: 10.seconds) to delay job execution, logger.info to log info, and job.status to check status.