Vishal Zambre vishalzambre

🧠 Mock Interview: Advanced Ruby (Pure Ruby / Automation)

1. Ruby Object Model

Q1. How does Ruby resolve a method call?

Model Answer

When Ruby receives a method call, it starts lookup from the object’s singleton class, then moves to the object’s class, followed by any prepended modules, then included modules (in reverse order), and continues up the superclass chain until BasicObject.

🧠 Data Structures & Algorithms – Complexity + Why Cheat Sheet

Quick reference for time/space complexity plus why & when to use each algorithm. Perfect for interviews, revisions, and system thinking.

🔁 Sorting Algorithms

	module StringToBooleanRefinementsService
	refine String do
	def to_bool
	return true if self == true \|\| self =~ /(true\|t\|yes\|y\|1)$/i
	return false if self == false \|\| self.blank? \|\| self =~ /(false\|f\|no\|n\|0)$/i

	raise ArgumentError, "invalid value for Boolean: \"#{self}\""
	end

	alias_method :to_b, :to_bool

	## Add System Service for Resque

	Copy below code and paste to /lib/systemd/system/resque.service
	`vim /lib/systemd/system/resque.service`

	```shell
	[Unit]
	Description=Resque Workers

	[Service]

	begin
	require "bundler/inline"
	rescue LoadError => e
	$stderr.puts "Bundler version 1.10 or later is required. Please update your Bundler"
	raise e
	end

	gemfile(true) do
	source "https://rubygems.org"
	gem "rails", github: "rails/rails"

	begin
	require "bundler/inline"
	rescue LoadError => e
	$stderr.puts "Bundler version 1.10 or later is required. Please update your Bundler"
	raise e
	end

	gemfile(true) do
	source "https://rubygems.org"
	# Activate the gem you are reporting the issue against.

	begin
	require "bundler/inline"
	rescue LoadError => e
	$stderr.puts "Bundler version 1.10 or later is required. Please update your Bundler"
	raise e
	end

	gemfile(true) do
	source "https://rubygems.org"
	# Activate the gem you are reporting the issue against.

	# lib/tasks/db.rake
	namespace :db do

	desc 'Dumps the database to db/APP_NAME.dump'
	task dump: :environment do
	cmd = nil
	with_config do \|app, host, port, db, user, password\|
	cmd = "PGPASSWORD='#{password}' pg_dump --host #{host} --username #{user} -p #{port} --verbose --clean --no-owner --no-acl --format=c #{db} > #{Rails.root}/db/#{app}.dump"
	end
	puts cmd

	begin
	require 'bundler/inline'
	rescue LoadError => e
	$stderr.puts 'Bundler version 1.10 or later is required. Please update your Bundler'
	raise e
	end

	gemfile(true) do
	source 'https://rubygems.org'
	# Activate the gem you are reporting the issue against.

	{
	"color_scheme": "Packages/Color Scheme - Default/Monokai.tmTheme",
	"draw_white_space": "all",
	"enable_tab_scrolling": false,
	"font_size": 18,
	"ignored_packages":
	[
	"Vintage"
	],
	"margin": 2,