Roshan Louhar roshanlouhar

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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System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

Clarify and agree on the scope of the system

User cases (description of sequences of events that, taken together, lead to a system doing something useful)
- Who is going to use it?
- How are they going to use it?

AES-256 encryption and decryption in PHP and C#

Update: There is a more secure version available. Details

PHP

<?php

$plaintext = 'My secret message 1234';

I've recently joined Amazon Dublin from India and got opportunities to interview with Meta London, Zalando Berlin & some other companies. I extensively researched about companies hiring internationally which support visa & relocation for Tech roles. So sharing list of companies:

Do consider to STAR, if it helped you.

London

	clear

	# FTP Server Variables
	$FTPHost = 'ftp://192.168.1.1/html/'
	$FTPUser = 'user'
	$FTPPass = 'password'

	#Directory where to find pictures to upload
	$UploadFolder = "C:\Temp\"

	"use strict";

	/**
	* Hypertext Transfer Protocol (HTTP) response status codes.
	* @see {@link https://en.wikipedia.org/wiki/List_of_HTTP_status_codes}
	*/
	enum HttpStatusCode {

	/**
	* The server has received the request headers and the client should proceed to send the request body

	[CmdletBinding()]
	param (
	[Parameter(Mandatory = $True)]
	[pscredential]
	$Credential,

	[Parameter(Mandatory = $True)]
	[System.String]
	$TenantId,

	<?xml version="1.0" encoding="utf-8"?>
	<RunSettings>
	<!-- Configurations that affect the Test Framework -->
	<RunConfiguration>
	<MaxCpuCount>1</MaxCpuCount>
	<!-- Path relative to solution directory -->
	<ResultsDirectory>.\TestResults</ResultsDirectory>

	<!-- x86 or x64 -->
	<!-- You can also change it from menu Test > Test Settings > Default Processor Architecture -->

	<!-- Custom caching policy for on HTTP POST for Azure API Management:
	1. Policy looks in the Request body - 'cacheKey' property which then used as cache key.
	Expected values are: <null>, ALL or NOEXPIRED
	Defaults to ALL in case <null>
	2. Cache expiration set to 60 seconds/1 minute
	!-->

	<policies>
	<inbound>
	<base />

	using Newtonsoft.Json;
	using Newtonsoft.Json.Linq;
	using StackExchange.Redis;
	using System;
	using System.Collections.Generic;
	using System.Configuration;
	using System.IO;
	using System.Linq;
	using System.Text;
	using System.Threading;