Interview Questions

Will I. - "Is it bad to get the answer a different way? Will they mark that as not knowing Bayes Theorem or just correct as it is an easier way to get the answer? The way I went is to look at what happens when the factory makes 100 light bulbs. Machine A makes 60 of which 3 are faulty, Machine B makes 40 of which 1.2 are faulty. Therefore the pool of faulty lightbulbs is 3/4.2 = 5/7 from machine A and 1.2/4.2 = 3/7 from Machine B."See full answer

Sid S. - "· Scoping the problem: · What kind of aeroplane - wide / narrow body, single/double deck. Assume normal domestic US plane with about 150 seating capacity Will the plane be empty(no passengers or luggage) - assume yes Will we only fill the cockpit, passenger area and cargo hold or do we need to consider wings, engines, etc - assume no We will consider the theoretical limit and ignore any inefficiencies in arranging the balls Breaking the problem down: Considering the interior o"See full answer

Rudra pratap S. - "Spotify is a platform which allows users to listen songs across the globe with variety of songs+singers and also gives opportunity to singers to create some money. It’s mission is to unlock the potential of human creativity by giving a million creative artists the opportunity to live off their art and billions of fans the opportunity to enjoy and be inspired by it. Spotify’s discover weekly feature is well aligned with the mission of Spotify as it recommends songs based on their previous content"See full answer

Araz J. - "Time taken: ~40min. I made up how Gmail Ads work A: Do you mind if I clarify a few things about this question? G: Sure! A: I would like to understand what Gmail ads is and how it works? G: Gmail ads are interactive ads that show in the Promotions and Social tabs of your inbox. A: I know there can be other emails under Promotions or Social tab such as different brands sending promotional emails. G: Gmail ads look different and are labeled as "ads by gmail" A: Great. And how does Gmail ads make"See full answer

Matthew K. - " function climbStairs(n) { // 4 iterations of Dynamic Programming solutions: // Step 1: Recursive: // if (n <= 2) return n // return climbStairs(n-1) + climbStairs(n-2) // Step 2: Top-down Memoization // const memo = {0:0, 1:1, 2:2} // function f(x) { // if (x in memo) return memo[x] // memo[x] = f(x-1) + f(x-2) // return memo[x] // } // return f(n) // Step 3: Bottom-up Tabulation // const tab = [0,1,2] // f"See full answer

Pm P. - "Clarification: With kids or without kids? Assuming without With the fuel filled ? Empty Formulae: Outer frame of the school + seats + cushion + inside rods + windows + Engine + motor + other automotive parts + tires Outer frame: Closest proxy : a compact car * 4 = length of the bus Assuming reinforced steel for a car = 2 doors * 200 = 400 pounds One side of the bus = 400* *x 4 x 2 = 3200 pounds two sides = 3200 x 2 = 6400 pounds front and back width = Estimation: 4 people sit in a"See full answer

Prabhav G. - "Assumptions and Clarification! What kind of blind person are we talking about ? Are they partially blind? Color Blind? Can Detect Light ? Can See blurry Images? Is the Blind person an adult, elderly or a teenager? Do they have any additional disabilities? Where will this Iron be used? At home? or perhaps one for travel? Do we have any limitation of resources? Assumptions- We are talking about a Complete Blind person who cannot see anything at all i.e Zero ability to se"See full answer

Manish E. - "Clarifying questions: US-based? And All year including holidays? First, what is the goal? Grow user base of Prime? Add revenue? I'd imagine it's to grow Prime base, as it's sticky and I imagine the Lifetime Value is higher as people will shop more if they have Prime. Then, I would look at the users. What are they trying to do? They're purchasing gifts, and looking to gift wrap. Take a look at the number of gift purchases total with gift receipt and no gift wrap. Call this X. Break thi"See full answer

Ben G. - "Situation - A time I had to think “outside of the box” was while I was at Google working on hotel solutions for smart displays. Smart displays are mutli-modal meaning they accommodate both touch and voice. I was given the task of leading the effort of scaling a new third party solution on top of our existing first party design system. However, the pandemic caused an unfortunate turn of events in that the needs of guests changed drastically and now needed a much more voice forward solution for"See full answer

R K. - "Clarifying questions: Can we pick any business product across CapOne spectrum? any preference? - Assume pick any Are there any specific geographies you'd like to focus on? Are there any specific customer segments you'd like to focus on? Are you able to provide any information on the market/competitive analysis? Or I can just make reasonable assumptions along the way. Confirming we care about revenue? not profit per customer? Lay out the framework: I'd like to focus on the followi"See full answer

Anna H. - "Great. I'm going to get started by asking clarification questions for (1) understanding of the gap by assessing current product features for bookings via platform?, (2) brainstorming possible solutions, (3) how to implement solutions, and (4) suggesting metrics to validate solutions towards an increase of bookings Clarification questions & Assumptions: What is customer segment (family/ group/ individual)? In which market? (individual & US market) Should I specifically focus on one of use ca"See full answer

Jeff S. - " class Node { constructor(data) { this.data = data; this.left = null; this.right = null; } } function diameterOfTree(root) { if (root === null || root.left === null & root.right === null) { return 0; } function countBranch(node, count) { if (node.left === null && node.right === null) { return count; } let left = node.left === null ? 0 : countBranch(node.left, count+1); let right = no"See full answer

Aswath B. - "basic drew the diagram"See full answer

Anonymous Sparrow - "Clarifying question: how does Uber know that this is happening and has there already been research as to why drivers are doing this? Approach: Understand the problem and how big of a problem is it? Is it a big enough problem to address given other competing priorities? Given the why's both for drivers and riders, ideate solutions to both drivers and riders Prioritize solutions Measure of success Summary Propose the approach above and solicit feedback from interviewer, incorporat"See full answer

Sri A. - "Success for Yelp reviews. (assuming these are standard reviews posted by customers, for a restaurant or bar or a cafe listed on Yelp. Has a 5-star calibration that users can enter and free-form text.) Select Metrics should span the entire funnel across adoption, engagement, quality, and overall impact for Yelp. Adoption metrics: Total # of reviews written, Avg reviews/ listing Engagement metrics: # reviews being scanned, marked as being useful, etc. Quality metrics: %ge of disputed"See full answer

Sammy R. - "In python def find_duplicates(arr1: List[int], arr2: List[int]) -> List[int]: result = list(set(arr1) & set(arr2)) return result "See full answer