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Junior Backend Developer candidate test

Intro

One of Apexlab's strategic partners, Olvasoegylet.io sent us a request for a book catalog application. They would like to have a public collection of books for their customers. You are the chosen one who may write POC (proof of concept) purely back-end (Node) JavaScript (Typescript) application which they could use to provide data for their various mobile application eg.: Book Renter.

Technical guideline

Generic

NMAP

nmap default

nmap -sC -sV TARGET -Pn -oN nmap/scan -p- -v

	Latency Comparison Numbers (~2012)
	----------------------------------
	L1 cache reference 0.5 ns
	Branch mispredict 5 ns
	L2 cache reference 7 ns 14x L1 cache
	Mutex lock/unlock 25 ns
	Main memory reference 100 ns 20x L2 cache, 200x L1 cache
	Compress 1K bytes with Zippy 3,000 ns 3 us
	Send 1K bytes over 1 Gbps network 10,000 ns 10 us
	Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD

	import {
	Children,
	cloneElement,
	createContext,
	useCallback,
	useContext,
	useMemo,
	useState,
	} from "react";
	import { Slot, SlotProps } from "@radix-ui/react-slot";

	scan target for pentest
	nmap -PN -n -A -sS -p- -oN output.nmap <IP>
	-Pn : no ping check (host is up),
	-n no dns resolution
	-A : detect systeme info
	-sT : tcp connect [laisse des traces dans les logs serveurs] (moins impactant que -sS Syn, ne laisse pas de trace dans les logs par defaut)
	-p- : port de 0-65535
	-oN output.nmap : write utput to file

	ajouter un scan udp en parallèle -sU (dns, ipsec ...)

	############ REPLACE app/models/enterprise_token.rb in the source code with this file! ################
	############ also be sure to RESTART OpenProject after replacing the file. ################
	############ it doesn't show that enterprise mode is enabled in the settings, but all ################
	############ enterprise mode features, such as KanBan boards, are enabled. ################
	#-- copyright
	# OpenProject is an open source project management software.
	# Copyright (C) 2012-2023 the OpenProject GmbH
	#
	# This program is free software; you can redistribute it and/or
	# modify it under the terms of the GNU General Public License version 3.

	// Find the latest version of this script here:
	// https://gist.github.com/rsms/a8ad736ba3d448100577de2b88e826de
	//
	const EM = 2048

	interface FontInfo {
	familyName :string
	styleName :string
	unitsPerEm :int
	ascender :int

	var IPV4 = /^(25[0-5]\|2[0-4][0-9]\|1?[0-9][0-9]{1,2})(\.(25[0-5]\|2[0-4][0-9]\|1?[0-9]{1,2})){3}$/,
	IPV6 = /^([0-9a-f]){1,4}(:([0-9a-f]){1,4}){7}$/i;

	[
	{
	"context": "Editor && VimControl && !VimWaiting && !menu",
	"bindings": {
	"ctrl-w z": "workspace::ToggleZoom",
	"ctrl-w t": "terminal_panel::ToggleFocus",
	"g ]": "editor::GoToDiagnostic",
	"g [": "editor::GoToPrevDiagnostic",
	"g r": "editor::FindAllReferences",
	"shift-k": "editor::Hover",

	# Docker compose to set up containers for all services you need:
	# VPN
	# Sonarr, Radarr, Lidarr, Qbittorrent
	# Non-VPN
	# Plex, get_iplayer
	# Before running docker-compose, you should pre-create all of the following folders.
	# Folders for Docker State:
	# /volume1/dockerdata. - root where this docker-compose.yml should live
	# /volume1/dockerdata/plex - Plex config and DB
	# /volume1/dockerdata/sonarr - Sonarr config and DB