Interview Questions

Anonymous Hamster - "talk about product and user not the design its not a UI/UX its a product question still"See full answer

Anonymous Unicorn - "naive solution: def countprefixpairs(words): n = len(words) count = 0 for i in range(n): for j in range(i + 1, n): if words[i].startswith(words[j]) or words[j].startswith(words[i]): count += 1 return count using tries for when the list of words is very long: from collections import Counter class TrieNode: def init(self): self.children = {} self.count = 0 # To count the number of words ending at this node"See full answer

Ekta M. - " Why do we want to increase the price? How much do we need to increase? Is it tied to some kind of revenue target? What is the region in which price needs to be increased? - Say India Who are the major players in that region who offer similar services and how are they priced? Will the users switch to those competitors? What is our unique proposition for retention? Do we have any leverage against them which will stop the users from churning? Any change in pricing or anything major like terms an"See full answer

Scarlett S. - "(This is debugging, then trade off question) WAU and email open rates can be influencing each other, especially an email opened and then clicked could lead to an active user, but it doesn't necessarily mean that they have correlations or be the only reason causing changes. The approach So we definitely need to look at each cause of Why MAU goes up, and why email notification open rates go down, then develop some hypothesis on for proper cause, I'd love to gather some info to narr"See full answer

Teja G. - "To describe designing a complex system architecture, an AI would outline its analytical, iterative, and constraint-driven approach, highlighting principles like microservices, scalability, and security. An AI's process would be based on patterns learned from vast datasets of successful architectural designs, focusing on adaptability for different applications. Here is a breakdown of an AI's approach to designing a complex system, followed by a hypothetical example based on its internal knowledge"See full answer

Catherine Z. - "Clarifying Questions Have we confirmed this was a server side issue and not client side or network related? Interviewer confirms this was a server side issue Do we have additional information on whether this was region specific, user specific? Interviewer says you can make some assumptions Introduction I am going to focus on a few potential factors and describe how they could lead to system downtime: Data Center Power Outage Software Deployment Software Bug P"See full answer

Darpan D. - "Clarifying and assumption When we say financial security, are we talking about authentication, fraud detection or money laundering? Assumption: Fraud detection. Focusing specifically on transaction-level fraud. Is this an internal AI implementation or an external third-party service we provide to multiple financial businesses? Assumption: External Third-party AI financial security product. Requirements Need to detect when fraudulent transactions happen. **Detection stra"See full answer

Sanjay V. - "Determining the need of a product, starts with the Problem or challenge we are trying to solve hence identifying a clear problem statement would kickoff the further analysis to find the answers of WHY... any product needed? WHAT... will it bring to the table? There are various techniques which can be used here like SWOT, Feedback, brainstorming workshop with stakeholders etc."See full answer

Nikolas C. - "That's really interesting how in section "Behavioral Interviews for Engineers" there is no single interview for, actually, Engineer. It's EM, SA, CEO, PM etc. So all problems are not relevant for people who are not managing products and not applying for manager's role. Will you consider adding at least couple of them? "See full answer

Glados - "First, why are we building the system? What are the requirements we must meet - Do customers care about data being read/written from a single set of tables or multiple tables, do they care about cost allocation, do they need backups/storage to happen slow or fast, do they foresee a lot of data movement from one table to another? Based on this, there are a few options using some common design choices. Shared disk, or Shared nothing. Both have pros and cons. Based on latency, performance, and cos"See full answer

Parag - "Clarify Retention for which side of the platform - advertisers, groceries/shops, shoppers, users? - Assume Is there any specific event or trend driving retention down or we’re looking in general to overall improve from current state? - Assume Is this tied to any particular geography or region? - Assume Is this tied to any specific persona within our 4 sided platform? - Assume Are we changing the definition of retention (time, frequency, others)? - Assume no Goal - Improve the use"See full answer

Ian S. - "Clarifying questions: What are we defining as "participation"? Does it include creating a live stream? Or is it just viewing a stream? Engaging (commenting/reacting) with other viewers during a live stream? ["Participation" = Watching, commenting, or reacting to a live stream as it's being broadcast, not during replays] Are these live streams from major broadcasters expecting large audiences? Or individuals making use of live broadcasting from their phones? [Across the board] "See full answer

Amparo L. - "The reason I want to work at Doordash is because I’m a really hard worker, I never give up and I’m good at delivering stuff to my teachers at school whenever they have something to drop off to them, I look at the paper and then I read the directions given to me on the ipad to drop it off."See full answer

Anonymous Jellyfish - "Thank you for the question! Normally, I would want to ask some clarifying questions to try to better understand the scope of the problem. Below are some of those questions & assumptions I am going to make because I need to submit an answer without getting a response. Question 1: What is Facebook’s north star metric for this exercise? Growth? Engagement? I’m also keeping in mind that because we are talking about building a birthday feature in the earlier stages of Facebook, their north s"See full answer