Pulkit Agarwal pulkit21

Originally published in June 2008

When hiring Ruby on Rails programmers, knowing the right questions to ask during an interview was a real challenge for me at first. In 30 minutes or less, it's difficult to get a solid read on a candidate's skill set without looking at code they've previously written. And in the corporate/enterprise world, I often don't have access to their previous work.

To ensure we hired competent ruby developers at my last job, I created a list of 15 ruby questions -- a ruby measuring stick if you will -- to select the cream of the crop that walked through our doors.

What to expect

Candidates will typically give you a range of responses based on their experience and personality. So it's up to you to decide the correctness of their answer.

DigitalOcean Ubuntu 14.04 x64 + Rails 4 + Nginx + Unicorn + PostgreSQL + Capistrano 3

Create a Droplet

SSH into Root

$ ssh [email protected]

Change Root Password

	DROP TABLE if exists d_date;

	CREATE TABLE d_date
	(
	date_dim_id INT NOT NULL,
	date_actual DATE NOT NULL,
	epoch BIGINT NOT NULL,
	day_suffix VARCHAR(4) NOT NULL,
	day_name VARCHAR(9) NOT NULL,
	day_of_week INT NOT NULL,

	curl https://api.onfido.com/v2/applicants \
	-H 'Authorization: Token token=api_key' \
	-d 'title=Mr' \
	-d 'first_name=John' \
	-d 'last_name=Smith' \
	-d 'gender=male' \
	-d 'dob=1980-01-22' \
	-d 'country=GBR' \
	-d 'addresses[][building_number]=100' \
	-d 'addresses[][street]=Main Street' \

	def flatten_array(array)
	array.each_with_object([]) do \|element, flat\|
	flat.push *(element.is_a?(Array) ? flatten_array(element) : element)
	end
	end

	http://bangalore.quikr.com/2016-Bajaj-Avenger-1900-kms-driven-W0QQAdIdZ287494816
	http://bangalore.quikr.com/Bajaj-Avenger-street-220.-2016-W0QQAdIdZ285620738
	http://bangalore.quikr.com/Bajaj-avenger-street-220cc-bike-for-sale-W0QQAdIdZ284486524
	http://bangalore.quikr.com/Bajaj-Avenger-2016-model-bike-for-sale-W0QQAdIdZ286438662

	source 'https://rubygems.org'

	ruby '2.2.1'

	# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
	gem 'rails', '4.2.1'
	# Use postgresql as the database for Active Record
	gem 'pg'
	# Use SCSS for stylesheets
	gem 'sass-rails', '~> 4.0.3'

	def run_encode(string)
	print string.chars.chunk{\|i\| i}.map{\|k, a\| a.length == 1 ? k : k + a.length.to_s }.join
	end

	INPUT STRING
	aaaaabbbbbbbbbccccpqrstuv
	OUTPUT
	a5b9c4pqrstuv

	require 'json/jwt'
	require 'jwt'

	module GoogleValidation

	GOOGLE_CERTS_URI = 'https://www.googleapis.com/oauth2/v3/certs'
	REQUIRED_AUDIENCE = ''
	REQUIRED_CLIENT_ID = ''

	def self.token_validation(token)

	require 'json/jwt'
	require 'jwt'

	module SignToken
	extend self

	def encrypt_data(payload)
	rsa_private = OpenSSL::PKey::RSA.generate 2048
	rsa_public = rsa_private.public_key
	token = JWT.encode payload, rsa_private, 'RS256'