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Javascript Interview Questions

Umar code solver answered on June 1, 2022 Popularity 10/10 Helpfulness 1/10

answer Javascript Interview Questions

Javascript Interview Questions

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-1

//Javascript Interview Questions

var a = [15];
var b = [15];
console.log(a[0] == b[0]);
//ture
console.log(a[0] === b[0]);
//true

Popularity 10/10 Helpfulness 1/10 Language javascript

Source: Grepper

Tags: javascript

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Contributed on Sep 23 2022

Umar code solver

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Javascript Interview Questions

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//Javascript Interview Questions

var a = [];
var b = [];
console.log(a == b);
//false
console.log(a === b);
//false

Popularity 10/10 Helpfulness 2/10 Language javascript

Source: Grepper

Tags: javascript j

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Contributed on Sep 23 2022

Umar code solver

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javascript interview question

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What is the output of 10+20+"30" in JavaScript?

3030 because 10+20 will be 30. If there is numeric value before and after +, it treats as binary + (arithmetic operator).

Popularity 10/10 Helpfulness 2/10 Language javascript

Source: Grepper

Tags: javascript j

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Contributed on Nov 21 2022

Mael

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Javascript Interview Questions

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//Javascript Interview Questions
var a = [];
var b = a;
console.log(a == b);
// true
console.log(a === b);
// true

Popularity 10/10 Helpfulness 2/10 Language javascript

Source: Grepper

Tags: javascript j

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Contributed on Sep 23 2022

Umar code solver

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interview questions javascript

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// Here are some commonly asked JavaScript interview questions:

// 1. What is JavaScript?
// 2. What are the data types in JavaScript?
// 3. Explain the difference between `null` and `undefined` in JavaScript.
// 4. Describe how prototypal inheritance works in JavaScript.
// 5. How does hoisting work in JavaScript?
// 6. Explain the concept of closures in JavaScript.
// 7. What is event delegation in JavaScript?
// 8. How do you handle asynchronous operations in JavaScript?
// 9. What is the purpose of the `this` keyword in JavaScript?
// 10. How can you check the type of a variable in JavaScript?

// Feel free to ask more specific questions or dive deeper into each topic mentioned above.

Popularity 10/10 Helpfulness 2/10 Language javascript

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Contributed on Sep 12 2023

YOU.com

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js interview questions

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function addFourNumbers(num1,num2,num3,num4){
  return num1 + num2 + num3 + num4;
}

let fourNumbers = [5, 6, 7, 8];


addFourNumbers(...fourNumbers);
// Spreads [5,6,7,8] as 5,6,7,8

let array1 = [3, 4, 5, 6];
let clonedArray1 = [...array1];
// Spreads the array into 3,4,5,6
console.log(clonedArray1); // Outputs [3,4,5,6]


let obj1 = {x:'Hello', y:'Bye'};
let clonedObj1 = {...obj1}; // Spreads and clones obj1
console.log(obj1);

let obj2 = {z:'Yes', a:'No'};
let mergedObj = {...obj1, ...obj2}; // Spreads both the objects and merges it
console.log(mergedObj);
// Outputs {x:'Hello', y:'Bye',z:'Yes',a:'No'};

Popularity 10/10 Helpfulness 1/10 Language javascript

Source: www.interviewbit.com

Tags: javascript j

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Contributed on Jun 01 2022

Strange Sable

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js interview questions and answers

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var scope = "global scope";
function check() 
{
    var scope = "local scope"; 
    function f() 
    { 
         return scope; 
    }
    return f;
  
}

Popularity 10/10 Helpfulness 1/10 Language javascript

Source: www.interviewbit.com

Tags: javascript j

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Contributed on Jul 23 2023

Sachin shelke

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js interview questions

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function display()
{
a = 10;
b  = 20;
c  = a+b;
debugger;
doc.write(c);
doc.write(a);
}
display();

Popularity 10/10 Helpfulness 1/10 Language javascript

Source: mindmajix.com

Tags: javascript j

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Contributed on Nov 05 2022

Akshay Surwase

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javascript interview questions

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-1

(function(){
  var a = b = 3;
})();

console.log("a defined? " + (typeof a !== 'undefined'));
console.log("b defined? " + (typeof b !== 'undefined'));

Popularity 10/10 Helpfulness 1/10 Language javascript

Source: Grepper

Tags: javascript j

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Contributed on Sep 12 2022

Umar code solver

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interview question in javscript

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"use strict";
x = 23; // Gives an error since 'x' is not declared
var x;

Popularity 10/10 Helpfulness 1/10 Language javascript

Source: www.interviewbit.com

Tags: javascript j

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Contributed on Mar 18 2023

K Rakesh

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js interview questions

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function sumOfThreeElements(...elements){
  return new Promise((resolve,reject)=>{
    if(elements.length > 3 ){
      reject("Only three elements or less are allowed");
    }
    else{
      let sum = 0;
      let i = 0;
      while(i < elements.length){
        sum += elements[i];
        i++;
      }
      resolve("Sum has been calculated: "+sum);
    }
  })
}

Popularity 10/10 Helpfulness 1/10 Language javascript

Source: www.interviewbit.com

Tags: javascript j

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Contributed on Jun 01 2022

Strange Sable

0 Answers Avg Quality 2/10

Javascript Interview Questions

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Javascript Interview Questions

javascript interview question

Javascript Interview Questions

interview questions javascript

js interview questions

js interview questions and answers

js interview questions

javascript interview questions

interview question in javscript

js interview questions

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