Question bank
4,310 interview questions, answered.
Reference answers, what the interviewer is really testing, how it is graded, and the follow-ups that come next.
Easy 190Medium 2,498Hard 982
Filters · onDifficulty, topic, company
28 questions
- 1Koko eating bananas.MediumCoding·
Flipkart, Amazon - 2Merge IntervalsMediumCoding·
Blinkit, Docquity Holdings(PBS) - 3Top k frequent elementsMediumCoding·
Amazon, Apple - 4Product of Array Except SelfMediumCoding·
PayPal, Target - 5Course ScheduleMediumCoding·
Zoho - 6Given a list of items with different sizes, write an algorithm to pack these items into the minimum number of batches without exceeding the capacity of each batch.MediumCoding·
Amazon - 7Given the root of a binary tree, return the length of the diameter of the tree.MediumCoding·
Amazon, Google - 8Count items within compartments between specific indices of an array.MediumCoding·
Amazon - 9Implement file searchMediumCoding·
Amazon - 10Implement a phrase search in a list of documents.MediumCoding·
Amazon, Confluent - 11Find the maximum product of any two integers in an array.MediumCoding·
Amazon - 12How do you split a machine learning dataset for training, evaluation, and testing?MediumCoding·
Amazon - 13Get the top API users based on transaction logs.MediumCoding·
Amazon - 14Print the top view of nodes in a binary tree.MediumCoding·
Amazon - 15Find all permutations of a given string.MediumCoding·
Amazon - 16Construct a binary tree given its preorder and inorder traversals.MediumCoding·
Adobe, Amazon - 17Detect cycle in graphMediumCoding·
Amazon - 18How can you tell if a graph is not a tree?MediumCodingTechnical·
Amazon - 19Given a factory represented as a 2D grid with some cells blocked and some containing robots, determine if the robots can collectively reach all unblocked cells.MediumCoding·
Amazon - 20Given an array of points and a point P, find the k closest points to P.MediumCoding·
Amazon, LinkedIn - 21Given a list of Nodes, each with a unique string id and a list of subnodes it depends on, find the maximum depth of the dependencies.MediumCoding·
Amazon - 22Given a binary matrix with every row sorted, find the index of the row containing the most number of 1s.MediumCoding·
Amazon - 23Find the shortest path in a graph.MediumCodingTechnical·
Amazon - 24Find the longest common prefix given two integer arrays.MediumCoding·
Amazon