Interview Questions

Vaidehi P. - "Clarifying questions: Can you please clarify inflight ads? Are you referring to the Ads shown on the screens/TVs available for each seat on an airplane? Ans: Yes. International flights or domestic? Ans: You pick. ( I picked US domestic) Are you targeting any specific airline? Ans: No. All airlines. Any specific type of ads such as banner ads, video ads etc? Ans: Video We can calculate market size in two ways: By calculating number of flights flying per day in the US * seat avai"See full answer

Vishal B. - "Design an elevator for the blind Clarification Questions A person who is not able to see at all or a person who can partially see? - completely blind Are we we focusing on the people who are visually impaired but, no other physically challenge? - Yes Goal Company already have the elevator products and now company is trying to enter into new market space. Users Blind users with some assistance - we are not focused on these people as they already have some a"See full answer

Bini T. - "I understand this is more focused on ML. However, I have a system question. If users allow us to access their location, or they send location via text box, could we use CDNs for the search without hitting our database? We only query the database when we have zero information on location. Other questions: does embedding always guarantee information on location? Do we discharge the user images after we return a prediction? I heard the feedback that we should keep it for future learning. What would"See full answer

Anonymous Salmon - "clarify: paid users, annual subscription user segmentation: levels; active vs dormant; age; regions use cases & pain points solution brainstorm: retention = activation + engagement + resurrection; prioritization of solutions execution"See full answer

Dinar M. - "Even more faster and vectorized version, using np.linalg.norm - to avoid loop and np.argpartition to select lowest k. We dont need to sort whole array - we need to be sure that first k elements are lower than the rest. import numpy as np def knn(Xtrain, ytrain, X_new, k): distances = np.linalg.norm(Xtrain - Xnew, axis=1) k_indices = np.argpartition(distances, k)[:k] # O(N) selection instead of O(N log N) sort return int(np.sum(ytrain[kindices]) > k / 2.0) `"See full answer

Anonymous Crab - "Clarify: Are we specifically referring to the point in time after a customer places an order to a restaurant, in the context of Doordash? Or are we talking about a generic online order? (Assume former) I am going to walk through what I think our business and product goal is, followed by the users and their painpoints in the workflow after they place an order. Then I will prioritize which pain points to solve for based on business objective and some other factors, and finally brainstorm and prio"See full answer

Karthik T. - "It's mainly an experimentation technique for testing new features while the rest of the users are using the old product version of your product. In our case, we were using it for pre-release or announced release features for a specific group of users. We could at any point revert the experience or stop the feature and render the old product version of the product. Based on the success of the feature, we will then do a full rollout of the feature into production. How does it work ? Enable"See full answer

Product V. - "\\\Start by saying thanks for the questions\\\ Apple maps is a utility product that allows users to navigate from point A to point B and find transit. It is exclusive to Apple devices Ask Clarifying QQ - What is the definition of the business owner - <500,000 USD in revenue per year Why you are targeting this segment - Apple maps can be a platform of choice for the business owners Why the current consumer version is not suitable - Not suitable to the needs of the SMB How do you define"See full answer

B. T. - "You are given a string S and a number K as input, and your task is to print S to console output considering that, at most, you can print K characters per line. Example: S = "abracadabra sample" K = 11 Output: abracadabra sample Note that this problem requires the interviewee gather extra requirements from the interviewer (e.g. do we care about multiple white spaces? what if the length of a word is greater than K, ...)"See full answer

Aditya O. - "Why is it answered like a Product Design Question? Shouldn't this be a strategy type answer analyzing the pros/cons of the service etc.?"See full answer

Connor W. - "In the expected value of a coupon problem, you calculated variance of a binomial distribution, and used the satandard deviation, square root of variance, to calculate the confidence interval. Will that approach work the same here? For fair coin: (Heads = 0, tails = 1) Var = 10 * (.5)(1-.5) = 2.5 Stdev = Sqrt(2.5) = 1.581 Mean = 5 Z-score = (Observed Val - Mean) / Stdev = (10 - 5) / 1.581 = 3.164 P val = 0.0008% (Slightly different from the video's solution of 0.00097) Pros of this approach: It"See full answer

Dolores - "Clarify question: Google flight search: flights.google.com (app or website) Allows users to search for flights, sort, or filter To book, you are directed to airline or aggregator sites Vision of the product: Help users find and compare flights they want to take Users: Flyers (primary user) Airlines and aggregator sites (prices, avail, options) Flight inventory providers Success metrics: Number of users/flyers like DAUs or MAUs % flyers (DAUs or MAUs) which are repeat Success"See full answer

Judy W. - "Clarifying questions: What is the objective of the GTM strategy? User acquisition? User retention? Who is the target audience of the GTM? What is the period we are looking at? Short term or long term? Assumption: Launched YouTube Shorts in South East Asia, measuring success of the user adoption and retention in one month and six month. Before we proceed, wanted to check whether we have any benchmark performance from past YouTube's GTM targeting creators? Say, Live stream on YouTube? "See full answer

Mark S. - "E(VAR(X))= VAR(X) VAR(X)= E[(X-E(X))^2] = E[X^2]-E[X]^2"See full answer

Jeff H. - "Google Pay currently makes money from a small percentage of interchange from each transaction. They also make money with Mobile recharge sim card fees. Questions Do we have a timeframe for this? How could we 10x this? Let's think about Alphabet's goal and vision to make the world more accessible and useful. To 10x it, we will need a combination of improvements, new revenue sources, and some paradigm shifting thinking. The goal in this case is monetization, and a steep on at t"See full answer

Ben G. - "Situation - A time when I worked well on a team was while I was working with the larger team at Blade to do the redesign before their IPO. Essentially, we had a month to launch a redesign (both visual and UX) of the entire project Task - I was tasked to direct all design efforts and strategy for the mobile and web experience on blade - being a lead in the trifecta group. Action - Through effective teamwork, we all led strategy and championed our areas of product, design and engineering. As a"See full answer