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HCL

18 problems · 9 with a MIK video · 1 asked in the last 6 months
D · DSA 8Q · SQL & DBMS 1
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18 problems, most frequent first

DoneLC #ProblemLevelHow often askedMIK video
1Two SumArraysEasy100▶ Watch
20Valid ParenthesesStackEasy83▶ Watch
3Longest Substring Without Repeating Characters ↗Medium78Not covered yet
88Merge Sorted Array ↗Easy78Not covered yet
125Valid Palindrome ↗Easy78Not covered yet
121Best Time to Buy and Sell Stock ↗Easy71Not covered yet
344Reverse String ↗Easy61Not covered yet
176Second Highest SalarySubqueriesMedium61▶ Watch
5Longest Palindromic SubstringDynamic ProgrammingMedium61▶ Watch
185Department Top Three Salaries ↗Hard61Not covered yet
647Palindromic SubstringsDynamic ProgrammingMedium61▶ Watch
151Reverse Words in a StringTwo PointersMedium61▶ Watch
53Maximum Subarray ↗Medium61Not covered yet
268Missing NumberMathEasy61▶ Watch
209Minimum Size Subarray SumSliding WindowMedium61▶ Watch
367Valid Perfect Square ↗Asked in the last 6 monthsEasy61Not covered yet
42Trapping Rain WaterArraysHard61▶ Watch
9Palindrome Number ↗Easy61Not covered yet

Source: community data (liquidslr/leetcode-company-wise-problems), updated Aug 16, 2026. Company tags are crowd-reported and may be incomplete.