An elevator is essentially a platform that is either pulled or pushed up by mechanical means. Requirements: Goes Up/Down. When going up we stop at all floors. When we get a request to go down, while we are going up, we first stop at the highest floor. Users can send requests…

An automated teller machine (ATM) is an electronic telecommunications device that enables customers of financial institutions to perform financial transactions, such as cash withdrawals, deposits, funds transfers, balance inquiries, or account information inquiries, at any time and without the need for direct interaction with bank staff. Requirements: Card Reader, to read…

A Movie Ticket Booking System is an online system that facilitates the purchasing of movies tickets to its customers. It also allows customers to browse through movies and book seats. Requirements List cities where cinemas are located. Each cinema can have multiple halls and each hall will run one show at…

Stack Overflow is a question-and-answer website for professional and enthusiast programmers. In the previous post, we discussed LLD, in this post we are going to discuss the HLD of StackOverflow. Functional Requirements Post questions, answers, upvotes, and downvotes. Follow Users. Home Timeline: To show relevant questions to users. Search Questions. Non Functional Requirements High Availability …

Stack Overflow is a question-and-answer website for professional and enthusiast programmers. Requirements: Users: They can be admin, moderators, or normal members. Admin can add, delete or block any members. Members can add questions, post answers, upvote/downvote any questions or answers. Moderators can delete any questions or answers. Moderators can undelete any…

TikTok is a video-sharing platform between users. Uploading, view video and scroll up to change video. Functional Requirements Upload Videos [MaxLength: 1 min, Text(caption)] Follow users Favorite Video Non Functional Requirements: High Availability (5 9s or 99.999%) Low Latency Scale Estimations: Say we have 1 million active users (AU) per day and on average a user…

A parking lot or car park, also known as a car lot, is a cleared area intended for parking vehicles. System Requirements Support multiple floors. Multiple Entry and exit points. Customers Receive receipts at entry points and pay the fee at the exit points. Each floor has many parking spots. Supports multiple…

Problem Statement: Design OOPs for Amazon Alexa devices. Echo Show and Echo Dot. These devices have different input(typing, voice), output(sound, display) and power(battery, plug-in) mode. Your Design should handle different input & respond with the correct output when Alexa is asked about its battery status(i.e. X% charged or plugged-in). Main…