What is the Queue system in Laravel?
Why Interviewers Ask This
This is a classic screening question for Laravel roles. Hiring managers ask it early in interviews to gauge your baseline understanding and determine if you can communicate technical concepts clearly.
Answer
Laravel's Queue system allows you to defer time-consuming tasks (sending emails, processing images, generating reports) to background workers, keeping HTTP responses fast. Create a job: php artisan make:job ProcessPodcast. Dispatch it: ProcessPodcast::dispatch($podcast) or dispatch(new ProcessPodcast($podcast)). Queue drivers: database, redis, sqs (Amazon SQS), beanstalkd, sync (no actual queue, runs immediately). Start a worker: php artisan queue:work. Delay a job: ProcessPodcast::dispatch($podcast)->delay(now()->addMinutes(10)). Failed jobs are stored and can be retried: php artisan queue:retry all. php artisan queue:failed lists failed jobs. Supervisor is used to keep queue workers running in production.
Pro Tip
If you're unsure about a detail, say so honestly and explain your reasoning. Interviewers respect candidates who can think through uncertainty rather than bluffing.