Estimation Interview Questions

P K. - "Note: Modifying the question to reflect the storage cost as well. Question: Estimate the cost of storing google photos on the photos app? Clarifying questions: Google photos - an app that syncs automatically to your camera app and uploads photos to Google cloud and reduces the need to store it on your device Cost of 1GB storage $0.002 Time storage cost per year Equation: Cost of storage per year = average cost of storing photos per day x 30 days x 12 months The ave"See full answer

D S. - "Estimate Google ads revenue. Clarifications: Google ads: only includes ads shown on Google search pages. It does not include any other ads such as display advertisement etc. Google makes money everytime a user clicks on an ad. Market - US Monthly / Yearly - Yearly Revenue in $ For 2020 ? - yes So to state the Q again, I have to estimate Google’s annual search ads revenue for 2020. Ads revene =( $ads clicked everyday * avg price per ad ) * 360 $ads clicked every"See full answer

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

Anonymous Porcupine - "Scope Clarification with Interviewer: Is it a standard civil 4-seater helicopter or a Military cargo carrier? Do we wish to calculate the balls in the passenger compartment only or do I consider the gas tank and other spaces in a helicopter? 3.Is the helicopter loaded with seats and passengers or do I assume that there are no seats and passengers/ pilot? Assumptions: The interviewer asked me to make assumptions. Its a standard 4-seater helicopter It is empty but has the standard seat"See full answer

Shreejal L. - "Clarifying questions: Should I include the tail of the helicopter when computing the area for this question? Can I assume that the average ping pong ball has a radius of around 1 inch? Assumption: Assume that the helicopter is more circular than a rectangle. Hence use the formula of a circle in computing the area. Assume that the helicopter's radius is 5 feet a 6 feet person can't stand on the helicopter because they're tall for it hence rounding down. Assume that th"See full answer

Kartikeya N. - "Clarifying questions We are referring to Facebook here within Meta products, correct?: Yes Can we base the CAC as of 2025?: yes Facebook acquires users through multiple channels, are we focussed on any particular channel? : We are looking at an overall CAC for Facebook What all do we want to include in CAC? Can we limit it to the marketing and advertising costs and leave aside technical, infrastructure or people costs?: yes Here’s how I will calculate this. **Customer acquisition c"See full answer

Kartikeya N. - "Clarifying questions By mutual follows, we mean that both of them follow each other on Tiktok, correct? : Yes We want to know an average number for the same, ie mean and not median or any other value, right? : Yes Shall we consider the global audience or that of a particular country? : Global Can we assume the time setting of this question as of 2025?: yes Here’s how I will tackle this question. > We will first estimate the total number of Tiktok users. Then we will try to"See full answer

Anna H. - "Assumptions: Table name : "Table" 02 columns ("City" and "Distance") "City" column contains distinct variables No "Null" values in Table SELECT City, AVG(Distance) AS Avg_distance FROM ( SELECT City, Distance, ROW NUMBER() OVER ( PARTITION BY City ORDER BY Distance ASC ) RowAsc , ROW NUMBER() OVER ( PARTITION BY City ORDER BY Distance DESC ) RowDesc FROM Table ) x WHERE RowAsc IN (RowDesc, RowDesc - 1, RowDesc + 1) GROUP BY City ORDER BY City ;"See full answer

Niaz - "Clarification questions: Does this include Street view photos, which includes (roads & highways, underwater & insider building and walking street view photos) ? No, for this question we will only look at photos taken via satellites. Google earth photographs the entire earth including land and oceans ? Yes Components of the equation (Square mile covering land x Number of photos per sq mile x Size of each photo x cost) + (Square mile covering ocean x Number of photos per"See full answer

Cameron P. - "Estimate the market size for Google Fi Market size -> total revenue/sales in a market = market share Google Fi -> telecommunication services by google. Only for US market Market size = (1)google fi customers / (2)total customers in the market (2)total customers in the market 300m ppl in the US 0-90 life expectancy Factor out 0-12,80-90 240m ~250m ppl in the US who are using phones and need a telecommunication service (1)google fi customers Version 40% - 110m AT&T 30% - 70m T-Mobil"See full answer

onering2ruleall - "Total volume of the swimming pool, let's say it's a standard 50m x 25 m x 2m =2500 m3 = 2.5 million litter standard water horse water flow rate is 17 liter per min. So, 2.5 m / 17 =147,059 min"See full answer

Sumeet R. - "Got a very different answer than everybody. I seem to be off here. But here goes ..will appreciate feedback Clarifying ..all human population in US and not just working population? Yes US Population: ~300Mn Segmenting Population. 0-19 - 75M 20-40- 75M 41-60 - 75M 60-80- 75M 80-100 - 5 Mn Removing 80 segment as stay at home and not eligible for commuting Revised Table 2-19 - 75M 20-40- 75M 41-60 - 75M 60-80- 75M Out of this employable audience that is has"See full answer

Anonymous Muskox - "Clarification Questions I am assuming we need to deliver the packages to the doorstep. I am assuming we need to deliver all the packages which are ordered in a single day. For more product interview experience, please visit TechnoManagers https://technomanagers101.blogspot.com/ High level formula Number of Drones required = (US Population 330M)(Excluding 30% those below 10 years and above 65 years)(internet penetration 90%)([ (10% high networth people)(30 orders per year) ] + ["See full answer

Chelsea F. - "Questions: Clarify: High school = grades 9-12? So roughly ages 15-18 (4 years)? Are we talking about all high-school aged kids, or kids who actually attend HS? Do we count home schoolers? Drop outs? Assumptions: Let's assume we're estimating the number of children in the U.S. who are enrolled in/attend HS Assuming a uniform distribution of the population across ages Approach: U.S. Population = 300m Average lifespan = 80 years 4 years represented by HS age = 5% of the populati"See full answer

Ananya M. - "US population = 330M , 80M across 4 generations population that is physically able to travel, can afford travel, travels for business ranges between 20-60 year olds = 160M calculating maximum demand: long weekends in summer are peak travel times, lets assume 60% of population who are able and can afford travel, do so during long weekend = 0.6x160M lets say 60% of this population choses prefers domestic travel while 40% go international (consider Mexico, Canada, London are international"See full answer

Michael P. - "clarifying questions: Particular location? Small town? Big town? Self- checkout vs. associate checkout? Weekly operating hours? Super-center vs small format? Competitive landscape? Store sales? Are we talking division 1 or adding health and wellness? Does the store have a vision center? Hair… nails … bank etc. Let’s say we agree that this is a super center in a suburb that wants to focus on converting to full self checkout. I’d have to look further into exact times with my data science team t"See full answer

Anubhav A. - "Clarifying question: We are just interested in facebook's ad rev and not other meta products We are looking at the rev coming per year globally formula = (avg. ads shown per min on fb products) x (avg. time spent per user per day in mins) x (avg. rev that fb makes per view) x (DAU) x 365 assumption all kind of ads give the same rev per view to fb all kind of geographies give the same rev per view to fb avg. ads shown per min -> user can scroll upto 20 posts easily in a min, lets"See full answer

Varun - "Clarify question and state assumptions: Streetview from my understanding is compiled by a streetview car going out and taking multiple photos and then Google stitches this together to give us streetview. I'm only going to look at the streetview outdoor experience, I know for e.g Google also has full views of some businesses, malls, museums etc so for the purposes of this I'm not going to calculate this. For the purposes of this is it OK if we say how much storage required to store streetview"See full answer

Anna H. - "Clarifying questions: How can we define a transaction? incoming /outcoming funds? A successful outcoming transaction as a wire transfer and requested by the payer or account holder. New users/ existing users? both Which platform for transaction requests? mobile/ desktop? both Are transactions direct from payer to beneficiary through a third-party such as banking/ financial services? yes Are there any bounds to time/resource constraint for transactions? E.g. internal, domestic or in"See full answer