Silas Baronda silasb

## The Technical Interview Cheat Sheet.md

      
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                This is my technical interview cheat sheet. Feel free to fork it or do whatever you want with it. PLEASE let me know if there are any errors or if anything crucial is missing. I will add more links soon.
              
          
    ANNOUNCEMENT

I have moved this over to the Tech Interview Cheat Sheet Repo and has been expanded and even has code challenges you can run and practice against!


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## docker-ssl-cert-generate
#! /bin/bash

# HEADS UP! Make sure to use '*' or a valid hostname for the FDQN prompt

echo 01 > ca.srl
openssl genrsa -des3 -out ca-key.pem
openssl req -new -x509 -days 365 -key ca-key.pem -out ca.pem

openssl genrsa -des3 -out server-key.pem
openssl req -new -key server-key.pem -out server.csr

## keenio_collector.rb
#!/usr/bin/env ruby
# -*- coding: utf-8 -*-

require "net/https"
require "uri"
require "json"
require "time"

KEENIO_PROJECT_ID = "XXXXXXXX"
KEENIO_READ_KEY = "YYYYYYYY"

## thread_pool.rb
# Ruby Thread Pool
# ================
# A thread pool is useful when you wish to do some work in a thread, but do
# not know how much work you will be doing in advance. Spawning one thread
# for each task is potentially expensive, as threads are not free.
#
# In this case, it might be more beneficial to start a predefined set of
# threads and then hand off work to them as it becomes available. This is
# the pure essence of what a thread pool is: an array of threads, all just
# waiting to do some work for you!

## Backup and download database backup
#!/bin/bash
#
# Script to create and download a database backup on Heroku
# Written by Chris Stefano (https://github.com/virtualstaticvoid)
#
# See http://devcenter.heroku.com/articles/pgbackups for details
#

appname=$1
filename=${appname}_db_$(date +%Y%m%d)_$(date +%H%M).pg_backup
	#! /bin/bash

	# HEADS UP! Make sure to use '*' or a valid hostname for the FDQN prompt

	echo 01 > ca.srl
	openssl genrsa -des3 -out ca-key.pem
	openssl req -new -x509 -days 365 -key ca-key.pem -out ca.pem

	openssl genrsa -des3 -out server-key.pem
	openssl req -new -key server-key.pem -out server.csr
	#!/usr/bin/env ruby
	# -- coding: utf-8 --

	require "net/https"
	require "uri"
	require "json"
	require "time"

	KEENIO_PROJECT_ID = "XXXXXXXX"
	KEENIO_READ_KEY = "YYYYYYYY"
	# Ruby Thread Pool
	# ================
	# A thread pool is useful when you wish to do some work in a thread, but do
	# not know how much work you will be doing in advance. Spawning one thread
	# for each task is potentially expensive, as threads are not free.
	#
	# In this case, it might be more beneficial to start a predefined set of
	# threads and then hand off work to them as it becomes available. This is
	# the pure essence of what a thread pool is: an array of threads, all just
	# waiting to do some work for you!
	#!/bin/bash
	#
	# Script to create and download a database backup on Heroku
	# Written by Chris Stefano (https://github.com/virtualstaticvoid)
	#
	# See http://devcenter.heroku.com/articles/pgbackups for details
	#

	appname=$1
	filename=${appname}_db_$(date +%Y%m%d)_$(date +%H%M).pg_backup