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Cognizant Problems
Master the most frequently asked interview questions for this company.
ID
Title
Difficulty
Topics
9
Palindrome Number
Easy
Math
3392
Count Subarrays of Length Three With a Condition
Easy
Array
2165
Smallest Value of the Rearranged Number
Medium
Math
Sorting
1
Two Sum
Easy
Array
Hash Table
509
Fibonacci Number
Easy
Math
Dynamic Programming
5
Longest Palindromic Substring
Medium
Two Pointers
String
242
Valid Anagram
Easy
Hash Table
String
26
Remove Duplicates from Sorted Array
Easy
Array
Two Pointers
53
Maximum Subarray
Medium
Array
Divide and Conquer
1068
Product Sales Analysis I
Easy
Database
7
Reverse Integer
Medium
Math
176
Second Highest Salary
Medium
Database
570
Managers with at Least 5 Direct Reports
Medium
Database
20
Valid Parentheses
Easy
String
Stack
14
Longest Common Prefix
Easy
Array
String
3
Longest Substring Without Repeating Characters
Medium
Hash Table
String
412
Fizz Buzz
Easy
Math
String
197
Rising Temperature
Easy
Database
4
Median of Two Sorted Arrays
Hard
Array
Binary Search
2
Add Two Numbers
Medium
Linked List
Math
88
Merge Sorted Array
Easy
Array
Two Pointers
204
Count Primes
Medium
Array
Math
1280
Students and Examinations
Easy
Database
15
3Sum
Medium
Array
Two Pointers
283
Move Zeroes
Easy
Array
Two Pointers
704
Binary Search
Easy
Array
Binary Search
202
Happy Number
Easy
Hash Table
Math
21
Merge Two Sorted Lists
Easy
Linked List
Recursion
35
Search Insert Position
Easy
Array
Binary Search
