springbig Ruby On Rails Developer interview questions

What are the pros and contras of validation in the web form on the frontend and backend?

What is left join? Inner Join?

What is the difference between the `map` and `each` methods in ruby? What is the difference between `find(id)` vs `find_by(id: id)` What is the difference between `destroy` vs `delete` What is the difference between `where(name: name)` vs `find_by(name: name)` What is the difference between `before_each` and `before_all` in RSpec?

How to validate uniqueness first and last names together?

What types of sorting algorithms do you know?

Convert binary number to decimal