Top Estimation Interview Questions

Jasmin R. - "Candidate: Before we go ahead I have a few clarifying questions, I’d like to ask. Interviewer: Sure. Candidate: What is the exact definition of a restaurant, are we counting coffee shops, bars, street food trolleys, homemade food shops that only has delivery to customers’ place and etc... kinds of a restaurant as well? Interviewer: let’s assume that we only mean restaurants that people can go inside, order some food and eat. Let’s not consider bars and coffee shops and so"See full answer

Sumeet R. - "Clarifying Questions: Assume US Audience or Worldwide? US Only Assume short form content or long form content ? Assume all Premium or Ads Support ? All Solution: US Population 300M Will remove 70 ages as not relevant audience or not have access to YouTube = 60m Leaving 240M. Adoption of YouTube with remaining Population = 60% (including overlap and exclusion with other services e.g. Netflix) Total Audience that watches YouTube daily = 144m (about half of US Populat"See full answer

Mark - "Questions: Should we consider US or Global? Is there any existing market insights/research around driverless cars adoption? Can we assume that driverless car technology is production / public ready by 2025? Is this focus on commercial or consumer use? Assumption: Let's look at US to start for our estimation since Driverless car regulation and adoption trend will probably differ per country Let's also assume we want to estimate market size for driverless cars in 2025 for consume"See full answer

Darren L. - "First I will set up the formula, second I will calculate each of the components then adding them up. Finally, I will talk about corner cases if any. 1, To begin with, I want to think broadly what could go into the equation. Bandwidth depends on number of devices at a time, so if a student use both laptop and phone at the same time then we have 2. Beside, grad students need internet for various reasons, such as checking email, searching on Google for information, watching lectures... Different a"See full answer

Helen Z. - "Two clarification questions first! When we say quarters, are we assuming the quarters are stacked on top of each other, or are we measuring across the diameter? let's say they are stacked. And second question, is the height of the building just from the ground floor to the top of the building? yes. Okay, the key numbers we need to find then are the height of the building in feet, and the # of quarters that fit into a foot. First for the height of the building, the key numbers are heigh"See full answer

Nitika B. - "Equation: Cost = Amount of storage required per year * Cost per year * 3 Amount of storage required per year = DAU * Storage requirement/user * 365 Assumptions: Cost per year = $99 = $100 Smart phone growth rate = 2% (But negligible at Pixel level) Annual Smart phone users = 2.8B Android users = 76% Google Pixel users = 1% Total Users = 2.8B * 0.01 = 280M *0.01 = 2.8M Method 1: Cost = Active Users + Cost/year * Number of years Cost = 3* 2.8M * $100 = 8.4M*100 = $840M Cost = $8.4B Method 2: C"See full answer

Rahul G. - "50% of users spending money on play store at a global level sounds off I would factor this to maybe 20% of play store users I'd go about solving for it as follows: Play store revenue has multiple revenue sources and in my view all are significant contributors, they are as follows: Ads Subscription revenue from app In app purchases I'll start with TAM(user count) for google play store = (population x internet penetration rate x smart phone share of internet users MINUS china user ba"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

Talles S. - "Me: thanks for the question, let me ask a few clarification questions if that's ok. Are those both personal and business users of Gmail? Interviewer: you can consider only the personal ones. Me: perfect, by personal ones, you mean the ones with [email protected], right? Interviewer: yes. Me: right, thank you. Also, are we considering e-mail users that use the Gmail platform or anyone who has a @gmail.com type of e-mail? Interviewer: anyone that has a @gmail.com e-mail. Me: Ok, finally, last"See full answer

Kwabena B. - "Assumptions This estimation will not take into consideration service fees, delivery fees, or tips we are specifically interested in consumer purchases of fruits and vegetables from local grocers (i.e. instacart, peapod, wholefoods/primenow, etc.) Fresh and frozen produce are in scope Equation NYC annual online produce purchases = (Num NYC households) x (% pop. that purchase produce online) x ($ spent on online produce purchases) (NYC HH) = 300M Americans --> 100M HH"See full answer

Zhi C. - "The opening of people spending a lot time on Facebook is way too long. Almost half time of the video. The analysis of Facebook business model should be very brief. People know Facebook business model. Maximize the ads display while balancing the user experience is the key. She can drive to this point much faster. Segmentation of user group feels irrelevant to the question. I would answer the question in a different way. Ads revenue is the single most revenue stream for Facebook. So we c"See full answer

So X. - "Why is the value of an Android user only considering incremental clicks on ads instead of all clicks on ads?"See full answer

John S. - "I have no idea if this would qualify, but I took a different, rather singular approach. Curious and gracious in advance for any and all feedback. My main question is whether this response goes into enough depth with regards to all the content types that Google Map stores, as I chose to focus uniquely on image storage (but am sure to state that clearly before I began): Clarifying questions: global map or US/sectional map? Assume global storage on a single end-user device? Yes consider co"See full answer

Indranil G. - "So we need to only consider Delhi within city limits? Yes And will we consider the big trees and not bushes? Yes Now inside Delhi total size is 1484 sq km means 2000000 sq km In this, there are 2% area which is lake or water so remove that will be (2000000-( 2000000 km*2%) )= 1960000 sq km In this area in Delhi, we have 20 % area where it is a park that means ( 1960000- (1960000*20%)) = 1568000 km area nonpark and 392000 km is a park area Obviously, in the park area, the density will b"See full answer

Saurao D. - "How many shampoo bottles are sold in the US annually? Assumption: Shampoo for both male and female consumers Population of US (330Mn) Considering 50:50 Urban Rural breakdown Urban: 165Mn Rural: 165Mn Considering only 10% of Rural consumers will be using shampoo, which gives 16.5Mn people Urban: 165Mn Considering 50:50 Male Female breakdown Male: 82.5Mn Male consumers using shampoo: 60% = 49.5Mn Male consumers not using shampoo: 40% = 33Mn Female: 82.5Mn Female consumers using shampoo: 80%"See full answer

Ananya M. - "I am assuming current situation where public transport have restarted but uber pool is yet to start. Assuming it's Bay Area = I am considering internet penetration to be 100% . pop = 8 million (2M per age group) age group that would use uber (20-80 , under 18s can't ride) x age group that can afford uber ( low:mid:high income = 20:50:30 meaning 80% of each qualifying age group can afford uber) x people per household in need of transportation (3 people per household, 2 cars on average per househ"See full answer

Anonymous Puma - "Assuming for the US Segment by size of businessNumber of employees per business sizePrice per employee=Revenue Price per employee should decrease with a larger employee base. 30M businesses in the US Small Business 60% of businesses are small=18M Average number of employees=50 Price per employee=$5 Small Business Revenue=$2.7B Medium Business 30% of them are medium=9M Average number of employees=1000 Price per employee=$3 Medium Business Revenue=$8.1B Large Business 10% of th"See full answer

Qusai B. - "Assumption: I’m estimating the minimum number of trains required to fulfil maximum demand I’m including all trains that’s serving NYC Formula: Before I state my formula, I would like to mention a few things I will be calculating the number of trains required to fulfill all demand at the peak time during a workday. I assume peak time lasts for 2 hours I’m assuming that a train takes 2 hours to complete one roundtrip on its route, which means any given train can service rider"See full answer

Talles S. - "Me: First, let's design our product and then we will calculate the estimated amount of units sold. Before we begin, is there anything specific about this refrigerator, is this a 'smart refrigerator'? Interviewer: Yes, you can consider this is a smart refrigerator but the overall design is up to you. Me: Thank you, one more question, do we have a specific user in mind? Younger people? Retirees? Interviewer: No, you can select the user base based on your prioritization, but theoretically it cou"See full answer

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