Questions about Rails internals, databases, optimisations techniques, etc
Ruby Developer Interview Questions
660 ruby developer interview questions shared by candidates
What my plans for the future are
Write a program that prints a multiplication matrix/table of the first N prime numbers. Generate the primes yourself, think about complexity and how the code scales.
The values interview questions were all provided beforehand by the internal recruiter, to allow the candidate to prepare answers in advance for each point. The technical interview tasks were also provided beforehand, for the candidate to prepare for, and to allow the candidate to practice both parts if they so desired. The first technical interview task was to domain model for a situation. The second technical interview task was to write the backend ruby code for a different requirement.
Describe rails models using Single Table Inheritance
first "screening" they asked rate and very very generic. I don't think the screeners are technical at all.
Round 1 : 60 mins coding test on their own portal with moderate questions. Round 2 : 1. Identify Circular Linked List or not with optimization. 2. Palindrome with linked list 3. What is rate count in API how to implement it. 4. Diff between Rest and Soap 5. What is static and dynamic language 6. Http verbs 7. Sql query for users, language and mapping table, find username who speaks more than 3 language. 8. Http response status 400 series 9. OAuth Round 3 : Design Database for Exam and question, one exam can have multiple questions and question can have 3 types, 1: multi choice 2. true false 3. match the answer. you need to store all options and it's answer as well. What is indexing, it's type and advantage and disadvantage SQL Query : You have rows with timestamp, get number of entries in last 24 hrs group by 1 hr. Round 4 : 1. What is the reason behind leaving all previous companies?(Be care full while answering this, it went negative for me) 2. When to use SQL and NoSql 3. Design whatsapp server side in 5-10 mins. Round 5 : Asked about my thesis research and how do you approach today with same problem.
Why we use "var" to declare the variable in JS, because we can declare variable without it?
What is the first improvement you would do for an SQL query that is slow?
You are running a car wash. Here are the rules: - Your car wash accepts cars and trucks. - You charge $5 for cars. - You charge $10 for trucks. - Your car wash charges $2 extra if the truck has mud in the bed. - Your car wash does not accept trucks with the bed let down. - If the vehicle comes in a second time, they get 50% off. - If the license plate equals 1111111, the vehicle is stolen and does not get a car wash.
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