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Cognizant Master DSA Sheet

This compilation contains exclusive, previously asked data structure and algorithm questions from real Cognizant interviews. Focus on these core problem patterns to confidently tackle even the hardest interview challenges.

top-specificcognizant-prep
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Valid Parentheses3 Months
Easy
Second Highest Salary6 Months
Medium
Find Numbers with Even Number of Digits
Easy
Longest Palindromic Substring3 Months
Medium
Climbing Stairs
Easy
Longest Substring Without Repeating Characters30 Days
Medium
First Missing Positive
Hard
Sort Array By Absolute Value
Easy
Students and Examinations
Easy
Maximum Subarray
Medium
Move Zeroes
Easy
String Compression
Medium
Roman to Integer
Easy
Merge Sorted Array3 Months
Easy
Single Element in a Sorted Array
Medium
Two Sum6 Months
Easy
Rotate Array
Medium
Palindrome Number6 Months
Easy
Add Two Numbers
Medium
Jump Game6 Months
Medium
Group Anagrams
Medium
Combine Two Tables3 Months
Easy
Fibonacci Number6 Months
Easy
Minimum Absolute Difference
Easy
Median of Two Sorted Arrays
Hard
Valid Anagram
Easy
Best Time to Buy and Sell Stock6 Months
Easy
Valid Palindrome
Easy
Subarray Sum Equals K
Medium
Find the Highest Altitude
Easy
Happy Number
Easy
Product Sales Analysis I
Easy
Remove Duplicates from Sorted Array
Easy
Search Insert Position
Easy
Article Views I6 Months
Easy
Reverse Integer
Medium
Fizz Buzz
Easy
Rising Temperature
Easy
Max Consecutive Ones
Easy
Single Number6 Months
Easy
Replace Employee ID With The Unique Identifier
Easy
Employees Earning More Than Their Managers
Easy
Binary Search
Easy
Smallest Value of the Rearranged Number
Medium
Count Subarrays of Length Three With a Condition
Easy