Cognizant LeetCode Questions

29 questions all-time · 18 easy · 10 medium · 1 hard

#	Problem	Difficulty	Frequency	Acceptance
1	Palindrome Number Math	Easy	100	59.2%
2	Count Subarrays of Length Three With a Condition Array	Easy	96	61.9%
3	Smallest Value of the Rearranged Number Math, Sorting	Medium	96	52.7%
4	Two Sum Array, Hash Table	Easy	83	55.8%
5	Fibonacci Number Math, Dynamic Programming, Recursion, Memoization	Easy	79	72.9%
6	Longest Palindromic Substring Two Pointers, String, Dynamic Programming	Medium	73	35.8%
7	Valid Anagram Hash Table, String, Sorting	Easy	73	66.7%
8	Remove Duplicates from Sorted Array Array, Two Pointers	Easy	67	60.4%
9	Maximum Subarray Array, Divide and Conquer, Dynamic Programming	Medium	67	52.1%
10	Product Sales Analysis I Database	Easy	67	84.6%
11	Reverse Integer Math	Medium	67	30.3%
12	Second Highest Salary Database	Medium	67	43.9%
13	Managers with at Least 5 Direct Reports Database	Medium	67	48.9%
14	Valid Parentheses String, Stack	Easy	67	42.3%
15	Longest Common Prefix String, Trie	Easy	67	45.5%
16	Longest Substring Without Repeating Characters Hash Table, String, Sliding Window	Medium	57	36.9%
17	Fizz Buzz Math, String, Simulation	Easy	57	74.4%
18	Rising Temperature Database	Easy	57	50.2%
19	Median of Two Sorted Arrays Array, Binary Search, Divide and Conquer	Hard	57	43.8%
20	Add Two Numbers Linked List, Math, Recursion	Medium	57	46.2%
21	Merge Sorted Array Array, Two Pointers, Sorting	Easy	57	52.9%
22	Count Primes Array, Math, Enumeration, Number Theory	Medium	57	34.8%
23	Students and Examinations Database	Easy	57	60.5%
24	3Sum Array, Two Pointers, Sorting	Medium	57	37.1%
25	Move Zeroes Array, Two Pointers	Easy	57	62.8%
26	Binary Search Array, Binary Search	Easy	57	59.6%
27	Happy Number Hash Table, Math, Two Pointers	Easy	57	58.1%
28	Merge Two Sorted Lists Linked List, Recursion	Easy	57	66.8%
29	Search Insert Position Array, Binary Search	Easy	57	49.0%

How to read this list

The tabs at the top split the questions by how recently people said they were asked in interviews. "Last 30 Days" is the past month, "Last 3 Months" is the past quarter, and so on. "All Time" is every question on record for this company.

Frequency is a score from 0 to 100 for how often a question showed up in that time window. A higher number means it came up more often, so the list starts with the most common questions first. Acceptance is the share of submissions that pass on LeetCode. Click any question to open it on LeetCode.