GoDaddy Coding Interview Questions
25 GoDaddy coding interview problems with full optimal solutions — 15 easy, 8 medium, 2 hard. Every problem ships with multiple approaches (brute-force first, then the optimal), complexity tables for each, company-specific tips on what an GoDaddy interviewer values, and a FAQ section.
- #3mediumfoundational
3. Longest Substring Without Repeating Characters
Find the length of the longest substring with all unique characters — GoDaddy applies this sliding-window pattern when validating domain labels and parsing URL path segments where repeated characters signal malformed input.
- #14easyfoundational
14. Longest Common Prefix
Find the longest shared prefix among an array of strings — GoDaddy's domain-autocomplete service uses exactly this vertical scanning approach to build prefix-filtered suggestion lists from millions of registered domain names in real time.
- #41hardfoundational
41. First Missing Positive
Find the smallest missing positive integer in O(n) time and O(1) extra space — GoDaddy's domain-registry team applies this index-as-hash-bucket pattern when allocating the next available numeric ID from a sparse, unsorted pool of existing registrations.
- #49mediumfoundational
49. Group Anagrams
Cluster strings that are anagrams of each other — GoDaddy uses the same sorted-key hash-table pattern to group similar domain name variations and detect typo-squatting slugs in their marketplace.
- #56mediumfoundational
56. Merge Intervals
Merge all overlapping intervals into the minimum non-overlapping set — GoDaddy's SRE team applies this pattern to consolidate maintenance windows and detect scheduling conflicts across their global hosting infrastructure.
- #76hardfoundational
76. Minimum Window Substring
Find the smallest substring of s containing all characters of t — GoDaddy's log-analysis pipeline uses this sliding-window pattern to extract the tightest matching span of request-ID tokens from large access-log streams without a full-text scan.
- #139mediumfoundational
139. Word Break
Determine whether a string can be segmented into dictionary words — GoDaddy's domain-suggestion engine applies this DP pattern to split brandable strings like 'websitebuilder' into human-readable word sequences for new TLD recommendations.
- #146mediumfoundational
146. LRU Cache
Design a data structure that evicts the least-recently-used entry when capacity is hit — this is the canonical DNS resolver cache problem that GoDaddy's infrastructure team asks to assess whether you can build O(1) get and put using a doubly-linked list plus a hash map.
- #200mediumfoundational
200. Number of Islands
Count connected land masses in a binary grid using BFS or DFS — GoDaddy's network team models hosting-cluster topology as a grid and uses this pattern to identify isolated server groups during infrastructure partitioning reviews.
- #208mediumfoundational
208. Implement Trie (Prefix Tree)
Build a trie that supports insert, search, and prefix lookup — GoDaddy's domain-search autocomplete is a direct application of this structure, making prefix-tree questions a staple in their platform-engineering interviews.
- #242easyfoundational
242. Valid Anagram
Check if two strings contain the exact same characters in the same counts — GoDaddy uses this hash-map frequency pattern in their domain-suggestion pipeline to detect whether two brand-name candidates are character-for-character rearrangements of each other.
- #547mediumfoundational
547. Number of Provinces
Count connected components in an adjacency-matrix graph — GoDaddy maps this to identifying isolated hosting-cluster groups where servers are directly or transitively connected through shared VPC peering relationships.
- #1easyfoundational
1. Two Sum
Find two indices in an array whose values sum to a given target.
- #2easyfoundational
2. Valid Parentheses
Determine whether a string of brackets is properly nested and balanced.
- #3easyfoundational
3. Merge Two Sorted Lists
Combine two sorted linked lists into one sorted list by splicing nodes.
- #4easyfoundational
4. Remove Duplicates from Sorted Array
Remove duplicates from a sorted array in-place and return the new length.
- #5easyfoundational
5. Remove Element
Remove all instances of a value from an array in-place and return the new length.
- #6easyfoundational
6. Search Insert Position
Return the index where a target is or would be inserted in a sorted array.
- #7easyfoundational
7. Plus One
Increment a large integer represented as an array of digits by one.
- #8easyfoundational
8. Merge Sorted Array
Merge two sorted integer arrays in-place into the first one.
- #9easyfoundational
9. Binary Tree Inorder Traversal
Return the inorder traversal of a binary tree's node values.
- #10easyfoundational
10. Same Tree
Check if two binary trees are structurally identical with equal node values.
- #11easyfoundational
11. Symmetric Tree
Determine whether a binary tree is a mirror image of itself about its center.
- #12easyfoundational
12. Maximum Depth of Binary Tree
Return the maximum depth (longest root-to-leaf path) of a binary tree.
- #13easyfoundational
13. Balanced Binary Tree
Check whether a binary tree is height-balanced.