Typeof JavaScript Interview Question #2 Q: What’s the output of the code below in the console log? Why? (function(){ var x = y = 7; })(); console.log("x defined? " + (typeof x !== 'undefined')); console.log("y defined? " + (typeof y !== 'undefined')); A: The ...
https://github.com/lydiahallie/javascript-questions/blob/master/zh-CN/README-zh_CN.md question & answer question answer https://github.com/sudheerj/javascript-interview-questions blogs https://codersera.com/blog/advanced-javascript-interview-questions/ https://www.fullstack.cafe/interview-questions/...
Answer: The data types inJavascriptinclude primitive types and reference types.null、undefined、boolean、string、symbol、bigInt,number. The reference type refers toObject. Yes, I answered the same way, but this is usually the first question, and many, many questions can be raised from this quest...
Functional coding interview questions have a nice property: you can show your work by first expressing what you are trying to achieve in plain English, then writing an unit test, and then coding the solution. The result as you can see is almost 1 to 1 mapping from plain Englis...
Question: How could you make sure to run some javaScript when DOM is ready like $(document).ready? Answer: There are four different ways- option-1: Put your script in the last tag of html body element. DOM would be ready by the time browser hits the script tag. option-2: Place your...
# JavaScript interview Question - Create a Array with two papameters without using loop! ## JavaScript - 不用循环, 创建数组 & 数据 https://stackoverflow.com/a/44206718/5934465 > JavaScript问题: 自定义一个函数,接收 m,n 两个整数参数, 返回一个长度为m 的且值都等于n的数组, 不能使用任何js ...
Question - 15 :JavaScript Regular function knowledgeWhat is the difference between `map()` and `forEach()` methods ? `Answer :` The 'map()' method creates a new array with the results of calling provided function on every element in the calling array . Whereas, the forEach() method ...
If we execute this Javascript, what will the browser's console show? var text = 'outside'; function logIt(){ console.log(text); var text = 'inside'; }; logIt(); JavaScript Do you have an answer? I have an answer I give up!
I have encountered this classic question several times during the interview in the past few days, and specially analyzed the answer from beginning to end. The classic feature of this question is that it comprehensively examines the comprehensive ability of the interviewer’s JavaScript, including the...
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