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1. Can you explain the difference between `has_many :through` and `has_and_belongs_to_many` associations in Ruby on Rails? When would you use one over the other? 2. How do you handle background jobs in a Rails application? Can you describe your experience with Sidekiq or any other background processing library? 3. Can you walk me through the steps to optimize an N+1 query problem in a Rails application? How do you usually identify and fix such issues?
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Ruby Developer

Interviewed at Endava

3.5★
Sep 23, 2023

1. Can you explain the difference between `has_many :through` and `has_and_belongs_to_many` associations in Ruby on Rails? When would you use one over the other? 2. How do you handle background jobs in a Rails application? Can you describe your experience with Sidekiq or any other background processing library? 3. Can you walk me through the steps to optimize an N+1 query problem in a Rails application? How do you usually identify and fix such issues?

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