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Cisco Master DSA Sheet

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

top-specificcisco-prep
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Find Servers That Handled Most Number of Requests
Hard
Meeting Rooms II
Medium
Valid Parentheses6 Months
Easy
Reverse Linked List
Easy
Spiral Matrix
Medium
Validate IP Address
Medium
Pow(x, n)
Medium
Longest Palindromic Substring
Medium
Trapping Rain Water
Hard
Two Sum IV - Input is a BST
Easy
Longest Substring Without Repeating Characters6 Months
Medium
Kth Smallest Element in a BST
Medium
Product of Array Except Self
Medium
Merge Intervals
Medium
Find Third Transaction
Medium
Rotate Image
Medium
Permutation in String
Medium
Minimum Window Substring
Hard
Convert Binary Number in a Linked List to Integer
Easy
Pascal's Triangle
Easy
Check if Binary String Has at Most One Segment of Ones
Easy
Move Zeroes
Easy
Number of Equal Count Substrings
Medium
Collect Coins in a Tree
Hard
Insert Delete GetRandom O(1)
Medium
Max Points on a Line
Hard
Maximum Subarray
Medium
Snakes and Ladders
Medium
Palindromic Substrings
Medium
Two Sum
Easy
Search in Rotated Sorted Array
Medium
Interval List Intersections
Medium
Word Search II6 Months
Hard
Number of Islands6 Months
Medium
Edit Distance6 Months
Medium
Reverse Words in a String
Medium
Decode String6 Months
Medium
Minimum Time to Collect All Apples in a Tree
Medium
Power Grid Maintenance
Medium
LRU Cache
Medium
Permutations
Medium
Longest Common Subsequence
Medium
Merge Sorted Array
Easy
Word Search6 Months
Medium
Reverse Nodes in k-Group
Hard
Letter Combinations of a Phone Number
Medium
Find the Duplicate Number
Medium
Gas Station
Medium
Subarray Sum Equals K
Medium
Group Anagrams
Medium
Sort Colors
Medium
Valid Palindrome
Easy
Add Two Numbers6 Months
Medium
Largest Rectangle in Histogram
Hard
Lucky Numbers in a Matrix
Easy
Diagonal Traverse6 Months
Medium
Best Time to Buy and Sell Stock
Easy
Lowest Common Ancestor of a Binary Tree
Medium
3Sum
Medium
Merge k Sorted Lists
Hard
Jump Game
Medium
House Robber
Medium
Happy Number6 Months
Easy
Remove All Adjacent Duplicates In String
Easy
Integer to English Words
Hard
Fizz Buzz
Easy
Longest Consecutive Sequence
Medium
Sliding Window Maximum
Hard
Search in Rotated Sorted Array II
Medium
Rising Temperature
Easy
Minimum Cost to Make Array Equal
Hard
Can Place Flowers
Easy
Remove Duplicates from Sorted Array
Easy
Linked List Cycle
Easy
Predict the Winner
Medium
Expressive Words
Medium
Design Search Autocomplete System
Hard
Single Number
Easy
Minimum Sensors to Cover Grid
Medium
Number of Valid Words in a Sentence
Easy
Count of Integers
Hard
Implement Router
Medium
Maximum Difference Between Increasing Elements
Easy
Stone Game
Medium
Sum of k-Mirror Numbers
Hard
Find the Largest Area of Square Inside Two Rectangles
Medium