Guesstimate for Google Product Management Interview [Google Product Interview Experience]

By -
Photo by Volkan Olmez on Unsplash

1. Number of Queries answered by Google per second?

Interviewer: Estimate the number of search query answered by Google per second ?

Shailesh: Okay Before I jump onto the solution, I have some questions which I want to get clarified. When we are estimating the number of search query, are we also taking care about search query for Gmail, Youtube, Google Maps or is it for Google search only?
Interviewer: For now you can focus only on the Google search.

Shailesh: Are we estimating the search query from a particular device like mobile or desktop or total number of search queries?
Interviewer: Across all the devices.

Shailesh: Are we focusing on a particular geography or globally ?
Interviewer: Globally.

Shailesh: Alright! let me iterate the goal of the problem. We want to estimate the number of search query per second answered by the Google search across all the devices globally.
Interviewer: Perfect

Shailesh: Okay let me give the overall structure of how would I approach the problem.

Overall Formula for the Problem
Formula
  • Global Population ~ 7.5 Billion, Internet penetration ~ 70% and Google market share is around ~80%.
  • Since people can’t use Google in China and some countries like Russia where Google isn’t very popular. So I would want to take account that as well. Total population which we can eliminate ~ 1.5 Billion
  • I would like to use 80–20 rule. The 80% of the google search will come by top 20% of the Users. I think myself to be in the top 20 percentile, on an average I do around 15–20 google search per day.

So keeping this into account, we can calculate the Total number of Google search queries.

Calculations

~ 140,000 Google search queries per second

2. Estimate the bandwidth consumed by Youtube Daily?

Interviewer: Estimate the bandwidth consumed by Youtube Daily.

Shailesh: Okay! Before I answer the question, I have some questions which I want to get clarified. My first question is are we talking about specific geography or global consumption?
Interviewer: Globally

Shailesh: Do we want to calculate the bandwidth for specific device like Desktop or Mobile?
Interviewer: Across all the platform.

Shailesh: Videos on Youtube can be played with 240p, 480p 720p etc. So are we going to calculate the bandwidth for any specific category or across all the categories?
Interviewer: Across all the categories

Shailesh: Let me reiterate the Goal of the problem, We want to calculate the Total bandwidth consumed by Youtube per day across all the platform globally?
Interviewer: Perfect.

Shailesh: Okay let me give the overall structure of the solution

  • Global Population ~ 7.5 Billion and Youtube is blocked in China (~1.5B), so we will calculate the total number of potential users to whom Youtube is available.
  • I am assuming that kids and senior citizens don’t use Youtube, so I will take the 60% as the number who watches Youtube to the total Population to whom Youtube is available.
  • We will divide the country in 3 categories like Developed countries (20%) having 100% internet penetration, Developing countries (50%) having 70% internet penetration and Under developed countries(30%) having 25% internet penetration. From this I will calculate the total video consumption.

Bandwidth calculations for Developed countries

Bandwidth calculations for Developing countries

Bandwidth calculations for Underdeveloped countries

~ Total Bandwidth Consumed = 1800 petabyte

-TechnoManagers

Comments

Post a Comment

Popular posts from this blog

Guesstimates for Product Interviews, Tips to ask clarification Questions

By -
Image
  Photo by  Antoine Dautry  on  Unsplash Guesstimates for Product Interviews, Tips to ask clarification Questions Estimate the number of Hotels | Estimate the number of users of Google Drive Estimate the number of hotels? Clarification Questions Understanding of Hotel Are we also including Airbnb, lodges or only hotels? [Only Hotels] Which geography are we talking about? [Bangalore] Overall Approach Define the area of Bangalore that will be around 600Km². Since there is a national park, a lot of lakes, forests, and wetlands so assuming that around ~50% of the area is there where a potential hotel can reside. So we are looking around an area of 300Km², we can divide this area into 3 parts according to the density, assuming a normal distribution of 25% highly dense for the hotel, 50% mid dense and the rest 25% is low dense. For highly dense that is closely around 75km², for a Km² we can have 5 hotels, that is around 375 hotels. For mid dense(150Km²), on an average, we ...
Click here to Read »

Design Uber for Kids. [Product Management Interview Question]

By -
Image
Image credits - https://gbksoft.com/blog Interviewer: Design Uber for kids Priyanka: Before we proceed, I would like to clarify my understanding of Uber. So, Uber is a digital ride-hailing platform that connects riders with drivers. The passengers can request a ride on the platform, and the driver can fulfil the demand by dropping them at the desired location. Uber acts as a facilitator between the two and takes a cut out of each ride that happens through its platform. Besides this, Uber also has business verticals like Uber Eats, Uber Freight, etc. Is my understanding correct? Interviewer: Yes. Priyanka: Alright, to understand the problem better, I would like to ask some clarifying questions. When we talk about kids, I am assuming we are referring to an age group of 10–16 years who can travel alone. Also, I am assuming that parents will be booking the rides for their kids. Interviewer: That’s a fair assumption Priyanka: Also, we are catering to the age group of 10–16, so the...
Click here to Read »

System Design Concepts for Product Managers — Part 1

By -
Image
This is a system design series for Product Managers who should have a high-level understanding of System Design. We will first cover the basic concepts of System Design. This is part 1, and stay tuned for future updates. 1. Load Balancer What is a Load Balancer? Load Balancer:  Load Balancer is a common term used widely when you are working on an application tha t  serves enormous traffic. Let’s understand with an example: Assume that Netflix has deployed several servers to handle the number of client requests. When we hit “Netflix.com”, how does Netflix know which server it has routed my request to? This is where the load balancer comes into the picture; load Balancers distribute the incoming traffic from the client efficiently across different servers and make sure that no server is getting overheated or overloaded. Reliability and availability are maintained by redirecting the incoming request to the available servers. Credits:  https://codeburst.io/ Load Balancing Alg...
Click here to Read »