Interview Questions

Kapil D. - "Overall a very good summary of ranking problems. I wish there are more details in the post on depth of modeling. One can talk more about advance ML architectures like DCN, BertRec etc"See full answer

TurboPM - "Assumptions: Geo: US Channels: Both Mobile/Web Includes Stocks and other kinds of tradable financial instruments Product for end users and not for FB employees to trade stocks or financial Instruments Separate App or integrated within the FB Blue App? Integrated within the Blue App Constraints:None Why might this make sense for FB? Recently with the advent of free retail trading platforms like Robinhood stock trading has been democratized and common people, young and old, hav"See full answer

Sameer A. - "Google’s Mission: Organize the world’s information and make it universally accessible. Google offers perhaps the most consequential set services available on the internet today - Search, Maps, Gmail, Drive, Docs, etc. These services reach billions of users across the world and they are all available for free. Google is able to give away these services for free because of how their business model works. Google’s Business Model: Google makes money from Ads. They offer perhaps the most"See full answer

Kofi N. - "const mergeIntervals = (intervals) => { const compare = (a, b) => { if(a[0] b[0]) return 1 else if(a[0] === b[0]) { return a[1] - b[1] } } let current = [] const result = [] const sorted = intervals.sort(compare) for(let i = 0; i = b[0]) current[1] = b[1] els"See full answer

Kanwarpreet S. - "Credibility is very important for success of any team. And it is something that takes time to build, but if i am inheriting a team that i did not build, i would spend dedicated time to understand team structure, dynamics and skill levels for every team member. Domain knowledge and experience are other important factors i would learn about each team member. In regular meetings i would introduce the culture of openness and respect where team members feel free to bring in ideas and constructive fee"See full answer

Yogi S. - "Might be good to have also explained how the engineer wasn't aware of th expedition process that you as a PM were able to identify when you spoke to the PM from the team that was providing the API, was it just a simple of case of not having access to information that you were able to help surface ?"See full answer

Shiva S. - "Clarification: Believe no constraints such as for specific market or for specific device, No specific goal , can explore what improve means. Goal: can I assume improve user experience and resolve pain points, and not around monetization So goal could be to improve engagement and higher customer satisfaction with google news as a product, so basically more usage, and lower churn So more DAU Users: Consumers based on how they consume: Deep dive into news reports in a specific area of the"See full answer

Manu G. - "I have a few clarifying questions before diving into designing a fridge for kids. What is this company in? - Startup exploring ideas to design fridge, or an already established fridge company - Startup Kids = which age group is referred to her or I can define the user segments? -* You can define it* Where is the refrigerator being used (household/school/daycare)? - Household Assumption: I am assuming Fridge's basic function is to freeze meats/ice cream/veggies etc and stor"See full answer

Sandy L. - "Clarify Functionality: Watch is a tab in FB app where people can upload and view Videos. What's the redesign? We collapsed the reaction and comment bar so people can see more videos and spend more time watching videos. What's the objective of the redesign? To help people discover and watch more videos they'll enjoy._ Structure To decide whether or not to ship this redesign, i'd like to go over. How does the Watch Tab fit into FB's mission and what's its goal? What's the long-"See full answer

stash - "To answer this question, I will first summarize the product and its use case. Thereafter, I will lay down the goals of the Company (LinkedIN) and the users with this product followed by going over user flows and determining what metrics we should use to measure success. We will go over a handful of metrics as a part of brainstorming but will only choose 2 or 3 to track overall success. Product Overview LinkedIn Events is a product will allows users to create online or offline events on Lin"See full answer

Nikita G. - "Thanks for the question. The way I would like to proceed with this question is firstly, to get more context about the problem by asking some clarifying questions and narrowing the scope. Then, I would like to break the problem into smaller components to understand where exactly our problem lies. Then make a user journey for that particular area and identify the technical and non-technical factors which might affect this change specific to our company/product. Post that, I'll analyse the external"See full answer

Sydney S. - "When a question like this is asked what is really being asked is "how do you think about the elements that make up a product and how does each part add value?". I generally try to answer it with a feature that has to do with user interaction. Good answers to this question could include "I would add a button to edit a post, and make it more visible and accessible rather than buried in a menu". Your rationale might be "**because it encourages users to post without fear that they will make"See full answer

Dessalew A. - "Gradient Descent = core engine for training most ML models It works by iteratively minimizing loss via gradients Many improvements exist (Adam, RMSProp, etc.) Alternatives exist for: Faster convergence Non-differentiable problems Direct metric optimization"See full answer

Aymen D. - "It would have been more interesting to focus on the system design rather than the Trie DS, Interviewee could have just mentioned the Trie and passed to things more important. Interviewee should have focused on the factors on which he wants to scale the API servers, popularity of the query parts ? region may be ? A hash of many factors ? Caches should have definitely be discussed, Cache eviction policies, Cache invalidation managements... Interviewee should have mentioned which kind of API pro"See full answer

Vasanth M. - "The question is about the decision to show the right # of photos in Facebook. Clarifying questions : Is this specific to Consumers or Business users ? Is there an drop or impact to the current metrics in terms of user engagement or the time spent on the post Are there any pain points to solve in terms of technical details like page loads etc.? Let's start with the users. There are 2 categories of users - Creators and Consumers. This can be further classified to say creators - Indiv"See full answer

Nikita C. - "Smart shoe: Q1) Is there any definition in mind/ thought process in terms of what this smart shoe will do? Interviewer: Its open to assumption Q2) Any specific user segments? Interviewer: Its open to assumption Q3) Any specific geographies? Interviewer: Its open to assumption Any specific user pain points? Interviewer: Its open to assumption I will structure the answer in following manner - 1) Clearly stating the assumptions 2) User segments 3) Pain points 4) Solutions 5) Key concerns 6) Metr"See full answer

Yugaank K. - "A recursive backtracking solution in python. def changeSigns(nums: List[int], S: int) -> int: res = [] n = len(nums) def backtrack(index, curr, arr): if curr == S and len(arr) == n: res.append(arr[:]) return if index >= len(nums): return for i in range(index, n): add +ve number arr.append(nums[i]) backtrack(i+1, curr + nums[i], arr) arr.pop() "See full answer

Nicholas S. - "First thing the interviewee did wrong is not asking clarifying questions. This is the most vague problem I have every heard, and the interviewee just made assumptions and started programming."See full answer

Satej M. - "Problem Statement: 10% of Netflix users are inactive. How would you investigate? Clarifying Question: Define inactive users? Assuming these are the users who have not logged Netflix for last week/last month etc Time span to measure inactive users? Assuming inactive users are inactive from last week. Investigation Questions: Has there been a change or error logged on the analytical tool we are measuring "Inactive users" metric? Does the metric show Netflix inactive"See full answer