Cracking interviews at FAANG companies is not a cakewalk, even for experienced ones

Securing a job at FAANG company is every programmer's dream, be it because of the amazing work culture, the pay package they offer, or the professional growth they offer, it's worth being a part of the FAANG ecosystem. Nonetheless, cracking interviews at FAANG companies is not a cakewalk, even for experienced ones. Imagine, what freshers would go through if they do not have the right orientation towards the nature of nerve-cracking programming languages interviews. Here we curate the top 10 interview questions generally asked in FAANG interviews.

Two sum problem

It is a common problem asked in coding interviews, which is similar to the subset sum problem. While there is a popular dynamic programming solution for the subset sum problem, the two-sum problem runs in on time. It requires finding all pairs of two integers in an inserted array, to sum up to a given sum.

Decode Ways

Given a string S, containing numerals and alphabets, the code should return the number of ways to decode it. It is the most commonly asked question that requires developing an algorithm and choosing a language to develop the code.

Palindrome using recursion

In the "Recursive Palindrome Check" or "Palindrome using Recursion" problem a string "s" would be given. You need to write a program to check if the given string is palindrome or not using recursion. A palindrome is a word, number, phrase, or another sequence of characters that reads the same backward as forward, such as madam or racecar.

Rotate image

In the Rotate Image problem solution, an n x n 2D matrix representing an image should be rotated by 90 degrees. You have to rotate the image in place, which means you have to modify the input 2D matrix directly.

Group Anagram

It is the most commonly asked question to test your knowledge of data structures and problem-solving abilities. An array of anagram strings is given to be grouped into one. As there is a large list of words in the array there is very much possible that you wouldn't find an anagram at all.

Zig-zag conversion problem

For the Zig zag conversion problem, a string is given and a few rows. The string would be written in a zig-zag pattern and the function you write should return what the string actually reads, line-by-line.

String to integer problem

‍Given a string s, which may contain numeric characters as well as non-numeric characters, you have to extract the first integer out of it.

Merge intervals

A set of time intervals is given in a random order in this problem. You are supposed to create a function that can overlap intervals into one and give an output with mutually exclusive intervals. Intervals are given as input in form of pairs. 

Sort Colors

An array containing N colored objects is given to be sorted into an array such that the same colored objects are placed together.  E.g., if we have three colors, we just use three variables to count the numbers 0, 1, and 2. After counting we first set all the zero to beginning using the count of zero variable.

And after it set all the ones and at the end set all the two's.

Spiral Matrix Problem

It is just the reverse of "print a given matrix in the spiral form'. You need to traverse the given array and pick each element one by one to fill the spiral matrix order. The syntax would have at least four loops, to print a corresponding row/column in the spiral matrix.