Question 1

Trapping Rain Water — ServiceNow Interview Question

Accepted Answer

"Trapping Rain Water" is a hard difficulty problem asked at ServiceNow interviews. It covers the following topics: Array, Two Pointers, Dynamic Programming, Stack, Monotonic Stack. You can practice it on LeetCode: https://leetcode.com/problems/trapping-rain-water

Question 2

Subarray Product Less Than K — ServiceNow Interview Question

Accepted Answer

"Subarray Product Less Than K" is a medium difficulty problem asked at ServiceNow interviews. It covers the following topics: Array, Binary Search, Sliding Window, Prefix Sum. You can practice it on LeetCode: https://leetcode.com/problems/subarray-product-less-than-k

Question 3

Valid Parentheses — ServiceNow Interview Question

Accepted Answer

"Valid Parentheses" is a easy difficulty problem asked at ServiceNow interviews. It covers the following topics: String, Stack. You can practice it on LeetCode: https://leetcode.com/problems/valid-parentheses

Question 4

Group Anagrams — ServiceNow Interview Question

Accepted Answer

"Group Anagrams" is a medium difficulty problem asked at ServiceNow interviews. It covers the following topics: Array, Hash Table, String, Sorting. You can practice it on LeetCode: https://leetcode.com/problems/group-anagrams

Question 5

LRU Cache — ServiceNow Interview Question

Accepted Answer

"LRU Cache" is a medium difficulty problem asked at ServiceNow interviews. It covers the following topics: Hash Table, Linked List, Design, Doubly-Linked List. You can practice it on LeetCode: https://leetcode.com/problems/lru-cache

Question 6

Lexicographically Smallest String After Operations With Constraint — ServiceNow Interview Question

Accepted Answer

"Lexicographically Smallest String After Operations With Constraint" is a medium difficulty problem asked at ServiceNow interviews. It covers the following topics: String, Greedy. You can practice it on LeetCode: https://leetcode.com/problems/lexicographically-smallest-string-after-operations-with-constraint

#	Question Title	Difficulty	Frequency	Topics
1	Trapping Rain Water	HARD	100.0	ArrayTwo PointersDynamic Programming+2
2	Subarray Product Less Than K	MEDIUM	100.0	ArrayBinary SearchSliding Window+1
3	Valid Parentheses	EASY	97.9	StringStack
4	Group Anagrams	MEDIUM	97.9	ArrayHash TableString+1
5	LRU Cache	MEDIUM	95.5	Hash TableLinked ListDesign+1
6	Lexicographically Smallest String After Operations With Constraint	MEDIUM	93.0	StringGreedy
7	Generate Parentheses	MEDIUM	93.0	StringDynamic ProgrammingBacktracking
8	Number of Distinct Roll Sequences	HARD	93.0	Dynamic ProgrammingMemoization
9	Find Minimum Diameter After Merging Two Trees	HARD	93.0	TreeDepth-First SearchBreadth-First Search+1
10	Longest Substring Without Repeating Characters	MEDIUM	87.0	Hash TableStringSliding Window

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