Top 10 Javascript Interview Questions | Data Structures and Algorithms | Arrays | WebStack Group

These Javascript questions are commonly asked in most of the interviews. In this video, you'll see the possible solutions for all the questions. These questions are really helpful if you are trying to crack the Javascript interview.

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Chapters:
0:28 - Sorting an array of numbers (Bubble Sort)
10:31 - Sorting an array [0, 1, 1, 0, 0, 1]
15:20 - Question on array method - 1 (Map)
19:34 - Question on array method - 2 (Filter, Reduce)
23:54 - Remove duplicates from an array
31:11 - Sum the digits in the given number (Recursion)
37:49 - Compute the exponent of a number (Recursion)
42:15 - Check any two numbers will sum up the given number (Two-Sum)
48:00 - Reverse a string
50:34 - Find the missing number

[upassit]

For Removing duplicates, you can use array Set method
Array.from(new Set(numbers));

[farhanbegg]

Hey man I hope you keep going you’re voice is very easy and clear to understand and the energy of the video is light thank you man

[TECHWITHKAMALRAJ]

Very helpfull video
brother...make more videos of javascript

[shivasampath]

Exponent problem we can simply return base ** exp

[kaja]

Hi! Thanks so much for creating this content! Found it very helpful. However there is an issue with the calculateSum function you have created. If you would try to introduce another mobile it would return NaN. Here is a little fix to go through as many objects as you want:

'
const calculateSum = (arr) => {
filterMobile = arr.filter((item) => {
if (item.type == "Mobile") {
return item;
}
});

return filterMobile.reduce((acc, mobile) => acc + mobile.price, 0);
};'

[ashoksingh]

For sum the mobile price. Only needs to use reducer iterator loop. It is easy to calculate

[paschalynukwuani]

Thank you so much for doing this video. You really put a lot of effort into this. Kudos!

[dufifa]

the sorting of 0, 1 we can do in 1 loop with reduce and immidiatelly filling the current array;

[Sk-eryj]

It's very helpful thank you so much for making this video 🤟🙏

[JabirMoiduVtk]

To sum mobile price:
var result = mobileList.reduce((a, b)=>{
return a+b.price
}, 0)

[nicklauschris]

why are we comparing this array with the inner for loop what happened to the outer for loop why are we not using it like am confused lately someone help please this content is really useful is there any content like this for beginner
🤔🤔🤔🤔

[rikunk]

For the "Sum the digits in the given number" question, sum should be >= 10

[vinaypatil]

Sir where are you?

Please start Data structures and algorithms series from beginner level to advance level in Javascript.

[richardbianco]

I saw someone remove duplicates from array using a "Set" then they used "..." and converted that set to an array. I kind of forgot how they did it, was just curious what the difference was.

[ehtisham_hashmi]

@43:33 6+5=11 check this. but u mark false why

[arammanukyan]

The sum function wasn't done right, , , its quiet expensive operation to make string from number so u just could solve this like this

function sum1(num) {
let res = 0;

while(num > 0) {
res+=num%10;
num=Math.floor(num/10)
}
return res;
}

sum1(123);

[Gitsh]

let newprice = product.map((item)=>{
return {...item, price:item.price * 2}
})

console.log(newprice)

[dufifa]

the sorting of 0, 1 we can do in 1 loop with reduce and immidiatelly filling the current array;