Ruby on Rails Ruby on Rails Action Mailer, Background Jobs & Caching 2

Question 1

What Rails command generates a new Active Job class called ProcessPayment?

Accepted Answer

rails generate job ProcessPayment

Answer

rails new job ProcessPayment

Answer

rails create job ProcessPayment

Answer

rails make job ProcessPayment

Question 2

Which method enqueues an Active Job for asynchronous background processing?

Accepted Answer

perform_later

Answer

enqueue_later

Answer

perform_background

Answer

run_async

Question 3

What is the default queue adapter in a Rails application when no background job gem is configured?

Accepted Answer

:async

Answer

:sidekiq

Answer

:inline

Answer

:synchronous

Question 4

How do you specify which queue a job should be placed in using Active Job?

Accepted Answer

queue_as :high_priority

Answer

set_queue :high_priority

Answer

job.queue = :high_priority

Answer

perform_on_queue :high_priority

Question 5

Which background job processing gem is most widely used with Ruby on Rails in production?

Accepted Answer

Sidekiq

Answer

Delayed::Job

Answer

Resque

Answer

Sucker Punch

Question 6

What does the retry_on class method configure in an Active Job?

Accepted Answer

Automatic retries for specified exceptions with configurable wait and attempt limits

Answer

Immediate synchronous retry on any exception

Answer

Restarts all stopped workers in the queue backend

Answer

Re-runs all previously failed jobs stored in the database

Question 7

Which method executes an Active Job immediately in the current thread without queuing it?

Accepted Answer

MyJob.perform_now

Answer

MyJob.run_now

Answer

MyJob.execute_now

Answer

MyJob.dispatch_now