| Search Word in Root-to-Leaf Word Tree | Easy |  |  | 
| Find Largest Subset of Compatible Jobs (Interval Scheduling) | Medium | microsoft |  | 
| Find Largest Consecutive Integer Range in Array | Medium | airbnb |  | 
| Optimal Array Rounding with Sum Preservation | Medium | airbnb |  | 
| Distributed Wikipedia Crawler System Design | Hard | google |  | 
| Crossword Grid Validation | Easy | palantir |  | 
| Word Sense Disambiguation Algorithm | Hard | quora |  | 
| Soundex Algorithm Implementation | Hard | grammarly |  | 
| Ternary Search Tree Implementation | Easy | zillow |  | 
| Lexicographically Smallest String with K-Position Moves | Easy | yahoo |  | 
| Maximum Edge Removal for Even Subtrees | Hard | adobe |  | 
| Maximum Word Packing on Board | Easy | google |  | 
| Closest pair of points | Easy | google |  | 
| Next Bigger Integer with Same Number of 1-Bits | Medium | facebook |  | 
| Uniformly Shuffle Linked List Nodes | Hard | apple |  | 
| Ways To Form Max Heap | Hard | microsoft
directi |  | 
| PageRank Algorithm Implementation | Hard | google |  | 
| Count Pairs with Given Sum and XOR | Easy | jane-street |  | 
| Minimum Flips to Separate X and Y | Medium | linkedin |  | 
| 2-CNF Boolean Satisfiability Problem | Hard | dropbox |  | 
| Stable Marriage Problem | Hard | amazon |  | 
| Implement Elo Rating System | Medium | facebook |  | 
| Construct Cartesian Tree from Sequence | Hard | netflix |  | 
| Minimize Maximum Mouse Distance to Holes | Easy | amazon |  | 
| Approximate Median in Sub-linear Time | Medium | dropbox |  | 
| 8-Puzzle Solver | Hard | airbnb |  | 
| Find Coin Denominations from Change Count | Medium | snapchat |  | 
| Minimum Radio Tower Broadcast Range | Medium | spotify |  | 
| Find Peak in Rotated Sorted Array | Easy | sumologic |  | 
| Minimize Cost to Remove Gaps Between People | Medium | walmart-labs |  | 
| BST Floor and Ceiling | Easy | oracle |  | 
| Bloom Filter Implementation | Medium | triplebyte |  | 
| Election Voting Machine Monitor | Easy | uber |  | 
| Water Plant Infrastructure Optimization | Medium | samsung |  | 
| Bartender Drink Optimization | Medium | amazon |  | 
| Stone Pyramid Construction | Hard | uber |  | 
| Dodgeball Team Division | Hard | twitter |  | 
| Qux Color Transformation | Medium | facebook |  | 
| Kaprekar's Constant Calculator | Medium | salesforce |  | 
| Website Similarity Analysis | Medium | quora |  | 
| Pythagorean Triplet Detection | Easy | netflix |  | 
| Binary Search Without Multiplication, Division and Bit-shift Operations | Hard | netflix |  | 
| Chess King Check Detector | Hard | Oracle |  | 
| Step Word Anagram Generator | Medium | pivotal |  | 
| Sentence Validation Stream Processor | Medium | Nest |  | 
| Huffman Tree Character Encoding | Easy | amazon |  | 
| Reconstruct Jumbled Sequence | Medium | pinterest |  | 
| Ghost Word Game Winning Strategy | Hard | two-sigma |  | 
| Wiggle Sort Linked List | Medium | fitbit |  | 
| Transitive Closure of a Graph | Easy | microsoft |  |