Design a 1:1 Messaging App Requirements Conversations User sees a list of conversations, with the most recently active conversations first. Scrolling do…

Count Connected Components in a Binary Matrix Given a binary matrix, count the number of connected components formed by the cells with value 1 . Cells a…

Input is a string and a maximum width length. If a word is too long to fit into one line, we change line and move it to the other line. Implement a Pyth…

Implement a FileStorage Library You are tasked with implementing a library for managing file storage in a cloud-based application. The library should al…

You are given a graph with X and Y axes. Each axis represents positive integers. We will plot a graph based on given X and Y points. Starting from (0,0)…

Goal Extract the vehicles with no associated vehicle parts. Requirements Expected column: vehicle_id This SQL interview question asks you to return vehi…

Before you begin This challenge is about processing real-time data from a webhook hosted by the Massachusetts Bay Transportation Authority (MBTA). For c…

Implement a Merger class that accepts a batch of data from each sensor and merges the batches into a single output stream sorted by timestamp. We have N…

Legiana, a Lyft user, is reviewing his rides from a specific day. However, the application is not retrieving the complete data for the rides, and they a…

Q: Implement sum() so that the following expressions evaluate correctly: sum(1, 2, 3).sumOf(); // 6 sum(2, 3)(2).sumOf(); // 7 sum(1)(2)(3)(4).sumOf();…

Every unique item in the input appears exactly 3 times. Examples: [1, 1, 1] => true [1, 2, 3] => false Consider a cache-like data structure with operati…

Card game N players randomly draw 4 cards per person. Winning rule Same color Same number Sequential This problem describes a 4-card hand evaluation sce…

Problem Description Input: N (1-20) Requirement: Count how many numbers with at most N digits do not contain consecutive digit 6 s. Example: 2, 0~99, in…

You’ll need to parse these tags: <p/> , <br/> , <blockquote/> , and <del/> . A sequence of two or more consecutive newline chara…

Assume you run a movie theater that has many auditoriums, and every day you need to schedule movies into those auditoriums. You want to schedule all mov…

Given a string s containing just the characters ( , ) , { , } , [ and ] , determine if the input string is valid. An input string is valid if: Open brac…

You are given an array of integers and another target integer as input. Your task is to return the index or indices of the target integer in the array a…

Given a string, return the longest recurring substring. This problem asks for the longest substring that appears more than once in the given string. A t…

National Park – BPC Definition: We are building a system that can track the campgrounds at a National Park as well as the attractions available for gues…

You can select any programming language. Implement a basic Pub/Sub following the given interface. // Interface interface Subscription { unsubscribe(): v…