rails/learn

Interview Prep

Most Rails interview prep teaches the syntax. Senior interviews do not test syntax. They test calibration, judgment, and how you defend technical decisions. Four framing lessons on how the interview actually works, plus ten Q&A drills on the questions you will be asked.

Framing

How senior interviews actually work, what to prepare, and the topics interviewers reach for in 2026.

1. How Senior Rails Interviews Actually Work 2. System Design for Rails Interviews 3. Behavioral Stories for Senior Roles 4. The Modern Rails Stack (Rails 8+)

Q&A drills

Each lesson takes one common interview question. What the interviewer is checking, the mid-level answer, the senior answer, the follow-ups to expect, and what signals what.

"How do you find and fix N+1 queries?"

"Walk me through a Rails request"

"What happens when belongs_to runs?"

"Tell me about service objects"

"includes vs preload vs eager_load vs joins"

"How would you cache an expensive query?"

"How do sessions and cookies work in Rails?"

"When would you avoid Active Record callbacks?"

"How do you handle long-running tasks?"

Q10

"How does asset compilation work in Rails 8?"

Want to drill the questions live? The matching Practice cards turn common interview questions into multiple-choice scenarios with answer rubrics, so you can commit to an answer before the explanation appears.

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