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ServiceNow DSA Interview Questions

Accelerate your cloud enterprise software placement preparation with the official ServiceNow DSA interview preparation sheet, custom-built for freshers, SDE-1, and SDE-2 aspirants. ServiceNow's massive cloud service ecosystems demand highly reliable, low-overhead algorithms capable of executing recursive workflow lifecycles, real-time ticket state tracking, and nested group hierarchies. This production-grade dataset features 54 of the most frequently asked ServiceNow coding interview questions across mission-critical archetypes—including topological workflow sorting graphs, low-latency log caches, hierarchical tree validations, and prefix string evaluators. Outfitted with direct LeetCode and GeeksforGeeks links alongside live candidate popularity tags, this tracking sheet will maximize your platform's user engagement and organic search value.

54 Problems
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1. Course Schedule II
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Very Hot
2. LRU Cache
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Very Hot
3. Decode String
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Hot
4. Merge Intervals
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Hot
5. Subarray Sum Equals K
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Hot
6. Find Median from Data Stream
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Very Hot
7. Trapping Rain Water
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Very Hot
8. Longest Substring Without Repeating Characters
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Hot
9. Product of Array Except Self
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Hot
10. Search in Rotated Sorted Array
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Very Hot
11. Number of Islands
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Warm
12. Valid Parentheses
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Hot
13. Best Time to Buy and Sell Stock
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Hot
14. Group Anagrams
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Warm
15. Two Sum
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Hot
16. Binary Tree Level Order Traversal
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Warm
17. Lowest Common Ancestor of a Binary Tree
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Hot
18. Word Break
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19. Maximum Subarray
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Hot
20. Design ServiceNow Event Engine Dependency Workflow (API Style)
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Very Hot
21. Kth Largest Element in an Array
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22. Climbing Stairs
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23. Longest Consecutive Sequence
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Hot
24. Coin Change
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Warm
25. Subsets
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Warm
26. Reverse Linked List
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Hot
27. Linked List Cycle
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Hot
28. Merge Two Sorted Lists
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Warm
29. House Robber
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Hot
30. Next Permutation
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Warm
31. Rotting Oranges
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Hot
32. Top K Frequent Words
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Warm
33. Merge k Sorted Lists
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Hot
34. Median of Two Sorted Arrays
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Warm
35. Sliding Window Maximum
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Hot
36. 3Sum
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37. Spiral Matrix
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Warm
38. Longest Increasing Subsequence
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Hot
39. Decode Ways
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Warm
40. Minimum Window Substring
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Warm
41. Container With Most Water
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Warm
42. Gas Station
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Hot
43. Word Search
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Warm
44. Partition Equal Subset Sum
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45. Diameter of Binary Tree
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46. Permutations
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Warm
47. Meeting Rooms
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Hot
48. Check if Subtree
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Warm
49. Edit Distance
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Warm
50. LFU Cache
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Hot
51. Design Add and Search Words Data Structure
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Very Hot
52. Validate Binary Search Tree
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Hot
53. Implement Queue using Stacks
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Warm
40. Implement Trie (Prefix Tree)
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Warm