**Intel Corporation** is an American multinational corporation and technology company headquartered in Santa Clara, California. It is the world’s largest semiconductor chip manufacturer by revenue and is one of the developers of the x86 series of instruction sets, the instruction sets found in most personal computers (PCs). Incorporated in Delaware,^{} Intel ranked No. 45 in the 2020 *Fortune* 500 list of the largest United States corporations by total revenue for nearly a decade, from 2007 to 2016 fiscal years.

It has got a 4.3* rating on Glassdoor and is considered one of the best product-based companies. It is highly regarded for its work-life balance.

They provide good training as well which will be beneficial in future too. You can practice the below questions collected from **Intel **Interview Experience for the interview. We have collected past frequently asked questions from **Intel **Interview Experience for your reference.

Categories of Questions

## Intel Array Questions

**Question 1. Insert Delete GetRandom O(1) Leetcode Solution** Problem Statement The Insert Delete GetRandom O(1) LeetCode Solution – “Insert Delete GetRandom O(1)” asks you to implement these four functions in O(1) time complexity. insert(val): Insert the val into the randomized set and return true if the element is initially absent in the set. It returns false when the ...

**Question 2. Trapping Rain Water Leetcode Solution** Problem Statement The Trapping Rain Water LeetCode Solution – “Trapping Rain Water” states that given an array of heights which represents an elevation map where the width of each bar is 1. We need to find the amount of water trapped after rain. Example: Input: height = [0,1,0,2,1,0,1,3,2,1,2,1] Output: 6 Explanation: Check ...

**Question 3. Missing Number Leetcode Solution** Problem Statement The Missing Number LeetCode Solution – “Missing Number” states that given an array of size n containing n distinct numbers between [0,n]. We need to return the number which is missing in the range. Example: Input: nums = [3,0,1] Output: 2 Explanation: We can easily observe that all the ...

**Question 4. Check given array of size n can represent BST of n levels or not** Problem Statement Given an array with n elements, check given array of size n can represent BST of n levels or not. That is to check whether the binary search tree constructed using these n elements can represent a BST of n levels. Examples arr[] = {10, 8, 6, 9, ...

**Question 5. A Product Array Puzzle** Problem Statement In a product array puzzle problem we need to construct an array where the ith element will be the product of all the elements in the given array except element at the ith position. Example Input 5 10 3 5 6 2 Output 180 600 360 300 900 ...

## Intel String Questions

**Question 6. Valid Parentheses Leetcode Solution** Problem Statement The Valid Parentheses LeetCode Solution – “Valid Parentheses” states that you’re given a string containing just the characters '(', ')', '{', '}', '[' and ']'. We need to determine whether the input string is a valid string or not. A string is said to be a valid string if open brackets must be closed ...

**Question 7. Isomorphic Strings Leetcode Solution** Problem Statement In this problem, we are given two strings, a and b. Our goal is to tell whether the two strings are isomorphic or not. Two strings are called isomorphic if and only if the characters in the first string can be replaced by any character(including itself) at all ...

**Question 8. Isomorphic Strings** Isomorphic Strings – Given two strings we need to check if for every occurrence of a character in string1 there is a unique mapping with characters in string2. In short, check, if there is one to one mapping or not. Example Input str1 = “aab” str2 = “xxy” Output True ...

## Intel Tree Questions

**Question 9. Convert a normal BST to Balanced BST** Problem Statement Given a Binary Search Tree(BST), write an algorithm to convert the BST to a Balanced Binary Search Tree. A balanced Binary Search tree is nothing but a binary search tree whose difference between the height of left subtree and right subtree is less than or equal to 1. ...

**Question 10. Check given array of size n can represent BST of n levels or not** Problem Statement Given an array with n elements, check given array of size n can represent BST of n levels or not. That is to check whether the binary search tree constructed using these n elements can represent a BST of n levels. Examples arr[] = {10, 8, 6, 9, ...

## Intel Stack Questions

**Question 11. Trapping Rain Water Leetcode Solution** Problem Statement The Trapping Rain Water LeetCode Solution – “Trapping Rain Water” states that given an array of heights which represents an elevation map where the width of each bar is 1. We need to find the amount of water trapped after rain. Example: Input: height = [0,1,0,2,1,0,1,3,2,1,2,1] Output: 6 Explanation: Check ...

**Question 12. Valid Parentheses Leetcode Solution** Problem Statement The Valid Parentheses LeetCode Solution – “Valid Parentheses” states that you’re given a string containing just the characters '(', ')', '{', '}', '[' and ']'. We need to determine whether the input string is a valid string or not. A string is said to be a valid string if open brackets must be closed ...

## Intel Other Questions

**Question 13. Contains Duplicate LeetCode Solution** Problem Statement: Contains Duplicate LeetCode Solution says that- Given an integer array nums, return true if any value appears at least twice in the array, and return false if every element is distinct. Example 1: Input: nums = [1,2,3,1] Output: true Example 2: Input: nums = [1,2,3,4] Output: false Example 3: Input: nums = [1,1,1,3,3,4,3,2,4,2] Output: ...

**Question 14. Group Anagrams LeetCode Solution** Problem Statement Group Anagrams LeetCode Solution Says that – Given an array of strings strs, group the anagrams together. You can return the answer in any order. An Anagram is a word or phrase formed by rearranging the letters of a different word or phrase, typically using all the original letters exactly once. Example 1: ...

**Question 15. Sliding Window Maximum LeetCode Solution** Problem Statement Sliding Window Maximum LeetCode Solution Says that – You are given an array of integers nums, and there is a sliding window of size k which is moving from the very left of the array to the very right. You can only see the k numbers in the window. Each time ...

**Question 16. Container With Most Water LeetCode Solution** Problem Statement Container With Most Water LeetCode Solution says that – You are given an integer array height of length n. There are n vertical lines are drawn such that the two endpoints of the ith line are (i, 0) and (i, height[i]). Find two lines that together with the x-axis form a container, such that the container ...

**Question 17. Reverse Integer Leetcode Solution** Problem Statement Reverse Integer LeetCode Solution says that – Given a signed 32-bit integer x, return x with its digits reversed. If reversing x causes the value to go outside the signed 32-bit integer range [-231, 231 - 1], then return 0. Assume the environment does not allow you to store 64-bit integers (signed or unsigned). Example 1: ...

**Question 18. Sort Colors LeetCode Solution** Problem Statement Sort Colors LeetCode Solution – Given an array nums with n objects colored red, white, or blue, sort them in-place so that objects of the same color are adjacent, with the colors in the order red, white, and blue. We will use the integers 0, 1, and 2 to represent the color red, white, and blue, respectively. ...

**Question 19. LRU Cache Leetcode Solution** Problem Statement The LRU Cache LeetCode Solution – “LRU Cache” asks you to design a data structure that follows Least Recently Used (LRU) Cache We need to implement LRUCache class that has the following functions: LRUCache(int capacity): Initializes the LRU cache with positive size capacity. int get(int key): Return the value ...

**Question 20. Product of Array Except Self LeetCode Solution** Problem Statement Product of Array Except Self LeetCode Solution – Given an integer array nums, return an array answer such that answer[i] is equal to the product of all the elements of nums except nums[i]. The product of any prefix or suffix of nums is guaranteed to fit in a 32-bit integer. You must write an algorithm that runs in O(n) time and without using the division ...

**Question 21. String to Integer (atoi) LeetCode Solution** Problem Statement The String to Integer (atoi) Leetcode Solution -“String to Integer (atoi)” states that Implementing the myAtoi(string s) function, which converts a string to a 32-bit signed integer (similar to C/C++’s atoi function). The algorithm for myAtoi(string s) is as follows: Read in and ignore any leading whitespace. Check if the next character (if ...

**Question 22. Palindrome Linked List Leetcode Solution** In the problem “Palindrome Linked List”, we have to check whether a given singly integer linked list is a palindrome or not. Example List = {1 -> 2 -> 3 -> 2 -> 1} true Explanation #1: The list is palindrome as all elements from the start and back are ...