Problem database last updated: June 20, 2025
6 problems · 1 Easy, 5 Medium, 0 Hard · Ranked #206 of 458
1 Easy
17% · avg 23%
5 Medium
83% · avg 59%
0 Hard
0% · avg 18%
Based on 6 reported problems, Airtel interviews are easier than average - only 0% Hard compared to 18% across all companies. The majority (83%) of questions are Medium difficulty, which is typical for companies that want to see solid fundamentals without excessive trick questions.
Compared to the industry average, Airtel puts unusual emphasis on prefix-sum (33.3% of problems, 10x the industry average), dynamic-programming (33.3% of problems, 1.7x the industry average). If you're short on time, these are the categories to double down on.
The most common topics are array (66.7%), prefix-sum (33.3%), string (33.3%), dynamic-programming (33.3%). Problems below are sorted by frequency, the ones at the top are asked most often.
| Problem | Difficulty | Frequency | Topics | |
|---|---|---|---|---|
Find Polygon With the Largest Perimeter You are given an array of positive integers nums of length n. | Medium | Very Likely | arraygreedysorting | Solve |
XOR Queries of a Subarray You are given an array arr of positive integers. You are also given the array queries where queries[i] = [lefti, righti]. | Medium | Very Likely | arraybit-manipulationprefix-sum | Solve |
Longest Substring Without Repeating Characters Given a string s, find the length of the longest substring without duplicate characters. | Medium | Very Likely | hash-tablestringsliding-window | Solve |
Best Time to Buy and Sell Stock You are given an array prices where prices[i] is the price of a given stock on the ith day. | Easy | Likely | arraydynamic-programming | Solve |
Find First and Last Position of Element in Sorted Array Given an array of integers nums sorted in non-decreasing order, find the starting and ending position of a given target value. | Medium | Likely | arraybinary-search | Solve |
Generate Parentheses Given n pairs of parentheses, write a function to generate all combinations of well-formed parentheses. | Medium | Likely | stringdynamic-programmingbacktracking | Solve |
Find Polygon With the Largest Perimeter
SolveYou are given an array of positive integers nums of length n.
XOR Queries of a Subarray
SolveYou are given an array arr of positive integers. You are also given the array queries where queries[i] = [lefti, righti].
Longest Substring Without Repeating Characters
SolveGiven a string s, find the length of the longest substring without duplicate characters.
Best Time to Buy and Sell Stock
SolveYou are given an array prices where prices[i] is the price of a given stock on the ith day.
Find First and Last Position of Element in Sorted Array
SolveGiven an array of integers nums sorted in non-decreasing order, find the starting and ending position of a given target value.
Generate Parentheses
SolveGiven n pairs of parentheses, write a function to generate all combinations of well-formed parentheses.
Frequency scores are based on crowdsourced interview reports. A higher score means the problem has been reported more often in recent Airtel interviews.
Very Likely
75-100%
Likely
50-74%
Sometimes
25-49%
Rare
0-24%
Airtel interviews focus heavily on array, prefix-sum, string problems. If you're short on time, these are the categories to prioritize. The problems on this page are sorted by frequency, so start from the top and work your way down.
Beyond solving problems, practice explaining your approach. Airtel interviewers care about your thought process - how you break down a problem, consider edge cases, and evaluate tradeoffs between solutions. A clean O(n) solution you can explain clearly beats an O(log n) solution you can't articulate.
Looking for more companies? Browse all 458 companies in our directory, or sharpen your fundamentals with our free data structure visualizers and AI-powered DSA tutor.
Airtel has been reported to ask 6 distinct coding problems. The most common topics are array, prefix-sum, string. 1 are Easy difficulty, 5 are Medium, and 0 are Hard. Problems are sorted by frequency - the ones at the top are asked most often.
Based on 6 reported problems, Airtel interviews are easier than average - only 0% Hard compared to 18% across all companies. 83% of questions are Medium difficulty. Focus on the high-frequency Medium problems first, then work through the Hard ones.
Start with the highest-frequency problems listed on this page. Focus on the core topics: array, prefix-sum, string. Practice solving them under time pressure and explaining your approach out loud. Mock interviews with AI can simulate the real experience.
Simulate a real Airtel coding interview with an AI interviewer. Get a scorecard with specific feedback on your problem-solving, code quality, and communication.
Simulate a Airtel interview with AIarrow_forward
