atlas-booker atlas-comstock

Three-way handshake misunderstanding and error analogy (RFC interpretation)

The TCP three-way handshake is almost a common problem for recent graduate interviews. However, there are still many mistakes on the Internet to know why [TCP is a three-way handshake, not two or four times? The popular answer on (https://www.zhihu.com/question/24853633) is an example. The first analogy of 3.6K approval is wrong:

Three-way handshake:
"Hey, can you hear it?"
"I can hear it, can you hear me?"
"I can hear you, today balabala..."

Studying for a Tech Interview Sucks, so Here's a Cheat Sheet to Help

This list is meant to be a both a quick guide and reference for further research into these topics. It's basically a summary of that comp sci course you never took or forgot about, so there's no way it can cover everything in depth. It also will be available as a gist on Github for everyone to edit and add to.

Data Structure Basics

###Array ####Definition:

Stores data elements based on an sequential, most commonly 0 based, index.
Based on tuples from set theory.

	#include <iostream>
	#include <vector>
	using namespace std;
	struct meet
	{
	int left, right, value;
	};

	// opt[i] = v[i] + opt[prev[i]]
	// opt[i] = opt[i-1]

	## node 1
	$ erl
	1> erl_epmd:start().
	2> erl_node:register_node(ejabberd, 23456).
	## Emergency 'epmd' Recovery

	## node 2
	$ erl -sname repair
	1> net_adm:ping(ejabberd@hostname).

	/* Exercise: Loops and Functions #43 */
	package main

	import (
	"fmt"
	"math"
	)

	func Sqrt(x float64) float64 {
	z := float64(2.)


	"set to auto read when a file is changed from the outside
	set autoread

	" Ignore compiled files
	set wildignore=.o,~,*.pyc

	"Always show current position
	set ruler

	#include <iostream>
	#include <complex>
	using namespace std;
	int main()
	{
	cout<<'a'<<endl;
	cout<<"string: str"<<endl;
	cout<<"*********************"<<endl;
	complex<float> a(3.14f, 4.12f);
	cout<<"a(3.14f, 4.12f) is "<<a<<endl;