Prashant Prakash Geek8080

System Design Cheatsheet

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

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?

	import java.io.BufferedReader;
	import java.io.InputStreamReader;
	import java.awt.*;
	import java.awt.image.*;
	import java.io.File;
	import java.io.FileNotFoundException;
	import java.io.PrintStream;
	import javax.imageio.ImageIO;

	public class ASCIIArt {

	import java.awt.*;
	import java.awt.image.*;
	import java.io.File;
	import java.io.IOException;
	import java.util.Iterator;
	import javax.imageio.ImageIO;
	import javax.imageio.ImageReader;
	import javax.imageio.stream.FileImageInputStream;
	import javax.imageio.stream.ImageInputStream;

	import java.io.*;
	import java.net.*;
	import java.util.*;

	final class HttpRequest implements Runnable {
	final static String CRLF = "\r\n";
	Socket socket;

	// Constructor
	public HttpRequest(Socket socket) throws Exception {

	import java.net.DatagramPacket;
	import java.net.DatagramSocket;
	import java.net.Inet4Address;
	import java.net.InetAddress;
	import java.util.Scanner;

	public class UDPClient {
	public static void main(String[] args) throws Exception {
	Scanner scan = new Scanner(System.in);

	import java.net.DatagramPacket;
	import java.net.DatagramSocket;
	import java.util.Arrays;

	public class UDPServer {
	public static void main(String[] args) throws Exception {
	DatagramSocket datagramSocket = new DatagramSocket(8500);
	byte receivedMessage[] = new byte[65536];

	DatagramPacket datagramPacket = null;

	import java.io.BufferedReader;
	import java.io.InputStreamReader;
	import java.io.PrintWriter;
	import java.net.ServerSocket;
	import java.net.Socket;

	public class TCPServer {
	public static void main(String[] args) throws Exception {
	ServerSocket serverSocket = new ServerSocket(10240);