js questions code example

Example 1: javascript advanced interview questions

<span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-title">addNode</span>(<span class="hljs-params"></span>) </span>{ <span class="hljs-keyword">var</span> newP = <span class="hljs-built_in">document</span>.createElement(<span class="hljs-string">"p"</span>);
										<span class="hljs-keyword">var</span> textNode = <span class="hljs-built_in">document</span>.createTextNode(<span class="hljs-string">" This is a new text node"</span>);
										newP.appendChild(textNode); <span class="hljs-built_in">document</span>.getElementById(<span class="hljs-string">"firstP"</span>).appendChild(newP); }

Example 2: javascript interview questions

// Collection of data in key-value pairs
JAVASCRIPT OBJECTS


var obj1 = {
   x:  43,
   y:  "Hello world!",
   z: function(){
      return this.x;
   }
}
      
// Collection of data as an ordered list
      
var array1 = [5, "Hello", true, 4.1];

Example 3: asking questions javascript in console

var readline = require('readline');

var rl = readline.createInterface({
  input: process.stdin,
  output: process.stdout
});

rl.question("What do you think of node.js? ", function(answer) {
  console.log("Thank you for your valuable feedback:", answer);

  rl.close();
});

Example 4: var x=21; var myFunction = function(){ console.log(x); var x= 20; }; myFunction();

var x=21;
var myFunction = function(){
console.log(x);
var x= 20;
};
myFuntion();

Example 5: javascript interview questions

class Person {
   constructor(name) {
      this.name = name;
   }
}

var object = new Person("Sudheer");