Dell

7 questions tracked7 with solutions

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Frequency scoreSorted highest → lowest frequency✓ Our Solution = we have a detailed walkthrough

Showing 7 of 7 questions

EasyValid Parentheses✓ Our Solution

100

StringStack

HardMerge k Sorted Lists✓ Our Solution

100

Linked ListDivide and ConquerHeap (Priority Queue)Merge Sort

MediumLongest Substring Without Repeating Characters✓ Our Solution

100

Hash TableStringSliding Window

MediumGroup Anagrams✓ Our Solution

100

ArrayHash TableStringSorting

MediumLongest Palindromic Substring✓ Our Solution

Two PointersStringDynamic Programming

EasyDelete Duplicate Emails✓ Our Solution

Database

HardDepartment Top Three Salaries✓ Our Solution

Database