Interview Questions

Jiale L. - "I’d open by confirming we’re designing object storage for arbitrary binary objects—images, backups, data lake files—not block volumes for VMs unless you redirect me. Actors: developers and services inside Amazon’s ecosystem, multi-tenant, millions of buckets, trillions of objects. MVP API: create bucket, PUT object, GET object, DELETE, list objects with prefix, HEAD for metadata. I’d ask about versioning, encryption at rest default, and whether"See full answer

Krishnan S. - "I would start with few clarifying questions for the investigation and diagnosis of the problem. Timing and volume: For how long is the peak surge being noticed? Past few days / weeks / months? Clarify about 'certain times'. Is it weekday Morning (Peak), Morning (off peak), Afternoon, Afternoon (peak), Evening (peak), Evening (off peak) or weekend? Do we info on vehicle type that have the most volume? Cars, trucks, commercial vehicles, etc., Location and convenience of the gas st"See full answer

Yulia D. - "What age of kid we are speaking about? Lets assume 5-10 years what messenger app are we talking about? you can choose Who is creating the feature? you can choose Finally, do we have any constraints? no, please, just imagine ok. so I think company's goal should be giving the tools for building communities among the youngest ones. First I want to issue what is Kids messenger app. I have kid of 5 years old and among my friends there are only few with gudgets that can provide messenger f"See full answer

gdecuri - "Load Balancer to multiple API Servers, pub sub system to publish user events, Game Engine Service, Write through cache and NoSQL DB. HTTP Long Polling to get user status updates"See full answer

Jax H. - "Let’s pick SFO (because it's a stupid choice.. probably easier if you pick a smaller airport) We know each passenger has to go through the scan at least once We can assume 10% of passengers go through twice People only go through scans when they depart but not when they arrive International planes are bigger so carry more people so need to calculate separately Approach Estimate how many gates there are Estimate airport operation hours Estimate the numbe"See full answer

Dania L. - "Was this asked as a part of the mini case?"See full answer

Priyanka V. - "Facebook groups operate to inculcate community interaction. I would deep dive into the current user behavior to understand a lot more User journey User age groups that show most activity Usage of features Dominant topics Any other data point that will provide insight to usage statics Based on above findings, I would devise a feature that would target increasing retention/time spent on the groups by incentivizing high performing user and/or user groups. Some examples of features"See full answer

Anonymous Salamander - "Microservices are small parts of a application we can deploy them seprately and use them as a application feature."See full answer

Sanjay P. - "Its my first post to answer such questions. Please do let me know your feedback for my improvement please. How many planes flying over city are at the moment Let meshare my understanding on the question, we want to estimate number of aeroplanes flying over city at any moment. Assumption: City:Hyderabad India On average A flight takes 5 min to cross city. We are going to average out as certainly number of planes on Sky in Night is far less than number of planes in Day, so ignor"See full answer

Rahul J. - "Assumptions: User type: school children living in the USA. Form factor: mobile app on iOS and Android Problem statement School children all across the country visit museums 2-4 times in a year. The museums have info on the contents and layout but that is static. Key value proposition of product is to guide users through the museum Internal company assessment Let's assume the interview is at Google. Google's mission is to organise the world's information so this problem aligns with"See full answer

Abdurhman M. - "One of the biggest work challenges I've overcome happened at my last job. Two team members were let go and I was left with the workload of three people. I fell behind and knew I couldn't keep up in the long term, so I asked my manager for help."See full answer

Exponent - "You should be able to identify this as a Strategy Question, which asks you to justify high-level business decisions and strategy. Here are some ideas for risks to Airbnb: Regulation > I believe the biggest risk to Airbnb is regulation, both from local and foreign governments. Already, Airbnb is subject to onerous laws in foreign countries. For example, homes in London can only be booked for a total of 90 days in London, and in Japan hosts must apply and register their listing with the gov"See full answer

P D. - "Building a great product is a journey Product has to: Identify the right set of customers Have to keep understanding the evolving needs to the users Have to solve it in the best way possible (Innovative, useful, easy to understand manner) Have to keep evolving with time by understanding evolving needs and data generated Price according to the users capacity and willingness to pay"See full answer

Bryan L. - "with var1 as (select players.playerid as playerid, player_name, team_id, score_id, max(scores.gamescore) as gamescore from players join scores on players.playerid = scores.playerid group by players.player_id) select teamid, playername, max_score from (select team_id, player_name, gamescore as maxscore, denserank() over (partition by teamid order by gamescore desc) as scorerank from var1) where score_rank <= 2 order by teamid, scorerank asc `"See full answer