TripAdvisor Coding Interview Questions
31 TripAdvisor coding interview problems with full optimal solutions — 22 easy, 7 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 TripAdvisor interviewer values, and a FAQ section.
Showing 22 problems of 31
- #19easyfoundational
19. Number of Islands
Count disconnected landmasses in a grid — Tripadvisor uses this graph-traversal pattern to reason about clustering isolated attraction zones or destination regions on their travel maps.
- #20easyfoundational
20. Clone Graph
Deep-copy a connected undirected graph — Tripadvisor mirrors this challenge when duplicating destination networks or recommendation graphs for A/B testing without corrupting the live data structure.
- #21easyfoundational
21. Top K Frequent Elements
Return the k most frequent values in an array — Tripadvisor applies this exact heap/bucket pattern to surface the top-k trending destinations or most-reviewed attractions on their homepage.
- #22easyfoundational
22. Group Anagrams
Cluster strings that are anagrams of each other — Tripadvisor applies this hash-map grouping pattern to deduplicate and cluster synonym hotel names or misspelled destination tags in their search index.
- #1easyfoundational
1. Two Sum
Given an array of integers and a target, return indices of the two numbers that add up to the target.
- #2easyfoundational
2. Valid Parentheses
Determine if a string of brackets is properly balanced and nested.
- #3easyfoundational
3. Merge Two Sorted Lists
Merge two sorted linked lists into one sorted linked list.
- #4easyfoundational
4. Remove Duplicates from Sorted Array
Remove duplicates from a sorted array in-place so each element appears only once.
- #5easyfoundational
5. Remove Element
Remove all occurrences of a value from an array in-place and return the new length.
- #6easyfoundational
6. Search Insert Position
Find the index of a target in a sorted array, or where it would be inserted.
- #7easyfoundational
7. Plus One
Increment a large integer represented as an array of digits.
- #8easyfoundational
8. Merge Sorted Array
Merge two sorted arrays in-place into the first array.
- #9easyfoundational
9. Binary Tree Inorder Traversal
Return the inorder traversal of a binary tree's node values.
- #10easyfoundational
10. Same Tree
Check whether two binary trees are structurally identical and have equal node values.
- #11easyfoundational
11. Symmetric Tree
Determine if a binary tree is a mirror of itself around its center.
- #12easyfoundational
12. Maximum Depth of Binary Tree
Find the maximum depth of a binary tree.
- #13easyfoundational
13. Balanced Binary Tree
Determine if a binary tree is height-balanced.
- #14easyfoundational
14. Minimum Depth of Binary Tree
Find the minimum depth of a binary tree from root to nearest leaf.
- #15easyfoundational
15. Pascal's Triangle
Generate the first numRows of Pascal's triangle.
- #16easyfoundational
16. Best Time to Buy and Sell Stock
Find the maximum profit from buying and selling a stock once.
- #17easyfoundational
17. Valid Palindrome
Check whether a string is a palindrome considering only alphanumeric characters.
- #18easyfoundational
18. Single Number
Find the element that appears only once in an array where every other element appears twice.