VIP Exclusive
Ruby on Rails Professional Practice Exam
Ruby on Rails — No single universally-recognized standardized certification exam exists for Ruby on Rails; this is an original comprehensive practice set aligned to industry-level Rails developer competency standards, covering the breadth and depth assessed by major technical screening platforms (Toptal, LinkedIn Skill Assessments, HackerRank) and senior Rails developer hiring pipelines.
55
Questions
90m
Time Limit
75.00%
To Pass
Question 1 of 55👑 VIP
Your Rails application has a `PostsController#index` action that renders a list of posts with their authors. After deploying, your team notices the page fires one SQL query to fetch all posts, then a separate SQL query for each post's author — 51 queries total for 50 posts. Which change most directly eliminates this N+1 query problem?
Questions 2–55 and full explanations are VIP-exclusive.