interview:developer:javascript:start [Questwork's Wiki]

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====== Javascript interview ======

===== Javascript =====

==== 問答題 ====

Reference: https://stackoverflow.com/questions/1684917/what-questions-should-a-javascript-programmer-be-able-to-answer

<note>
[[https://jsfiddle.net/questwork/ttmyG/|Why would this code not work as expected? Is anything missing?]]
<code>
  class User {
    constructor(name) {
      this.name = name;
    }
  }
</code>
</note>

<note>
[[https://jsfiddle.net/questwork/72pHB/|Why does it alert undefined when I declared the jack variable to be 'Jack'?]]
</note>

<note>
[[https://jsfiddle.net/questwork/Ge9ta/|What will this code alert? Why?]]
</note>

<note>
[[https://jsfiddle.net/questwork/6QppX/|Why does the second alert say undefined?]]
</note>

<note>
[[http://jsfiddle.net/questwork/qj2z7/|Why do the anchors, when clicked on, alert -1 instead of their respective counter inside of the loop?]]

http://jsrun.net/QpbKp/edit

The difference is scoping. var is scoped to the nearest function block and let is scoped to the nearest enclosing block.
</note>




  * Function.prototype.apply() 是什麼呢？
  * ES6 跟 ES5 有什么差别？请以代码举例。
  * What is JSON?
  * Explain MVC
  * 什么是 Callback？ 
  * 什么是 Promise？
  * Callback 跟 Promise 有什么差别？请举例。
  * 什么是设计模式 Design Pattern？请指出三个设计模式并以代码说明其中一个。


==== 習作題 ====

<note>
數列

http://jsfiddle.net/questwork/nfb7B/
</note>



===== NodeJS =====


<note>
Node.js event loop 
reference: https://blog.risingstack.com/node-js-at-scale-understanding-node-js-event-loop/

https://jsfiddle.net/questwork/10497gs8/
</note>



===== MongoDB =====

假设你要做一个图书管理系统。你会怎样设计 MongoDB document 以达到以下需求？

  * 读者能以作者姓名丶分类丶书名丶出版社丶年份找书籍。
  * 请写出以作者姓名或书名的 Query？

===== Framework =====

  * 有没有使用 Node.js + Express + MongoDB + Mongoose 的经验？请举例。
  * 有没有使用 oAuth 及 Passport.js 的经验？请举例。
  * 有没有使用 Backbone.js 的经验？什么是 Model, View？请举例。
  * 有没有使用 ReactJS 的经验？请举例。