Fullstack Developer

You are given an array “ARR” of size N. Your task is to find out the sum of maximum and minimum elements in the array.

Follow Up:

Can you do the above task in a minimum number of comparisons?

You are given an array of integers. You need to sort the array in ascending order using quick sort.

Quick sort is a divide and conquer algorithm in which we choose a pivot point and partition the array into two parts i.e, left and right. The left part contains the numbers smaller than the pivot element and the right part contains the numbers larger than the pivot element. Then we recursively sort the left and right parts of the array.

Example:

Let the array = [ 4, 2, 1, 5, 3 ]
Let pivot to be the rightmost number.

After the 1st level partitioning the array will be { 2, 1, 3, 4, 5 } as 3 was the pivot. After 2nd level partitioning the array will be { 1, 2, 3, 4, 5 } as 1 was the pivot for the left part and 5 was the pivot for the right part. Now our array is sorted and there is no need to divide it again.

List of all firstName from the array whose age is more than 30
const users=[
 {firstName:"john",lastName:"Biden",age:26},
 {firstName:"jimmy",lastName:"Cob",age:75},
 {firstName:"Sam",lastName:"Lewis",age:50},
 {firstName:"Ronald",lastName:"Mathew",age:26},  
];

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4. How does this keyword behave in an arrow function?
5. Higher-order functions and their examples. (Learn)
6. What are Events in JS and how to implement it? (Learn)
7. Explain promises and in which scenario we are using them.

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2. Aggregation in MongoDB. (Learn)
3. CORS and API fetching
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5. Different HTTP request methods CRUD operations with scenarios 
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7. Explain virtual DOM in react. (Learn)
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11. Higher order Components why do we use them? (Learn)