Browse LeetCode problems frequently asked by Airtel. Filter by difficulty and timeframe to focus your interview prep.
Last updated: 20 Feb 2026
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30 days
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More than 6 months
All
Easy
Medium
Hard
All
Problem
Difficulty
Frequency
Topics
Longest Substring Without Repeating Characters
MEDIUM
75%
Hash TableStringSliding Window
XOR Queries of a Subarray
MEDIUM
100%
ArrayBit ManipulationPrefix Sum
Find Polygon With the Largest Perimeter
MEDIUM
100%
ArrayGreedySortingPrefix Sum
Find First and Last Position of Element in Sorted Array
MEDIUM
62.5%
ArrayBinary Search
Next Permutation
MEDIUM
75%
ArrayTwo Pointers
Best Time to Buy and Sell Stock
EASY
62.5%
ArrayDynamic Programming
Container With Most Water
MEDIUM
62.5%
ArrayTwo PointersGreedy
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