June 18, 2018

T and I agreed to meet every Sunday mornings for an hour to talk product management. We will alternate between playing interviewer/interviewee with PM interview questions we find on tech blogs and interview books. Most of these entries will be brief to demonstrate how I'm developing better interview practices.

Q: (T) How many cars are on 101 between San Francisco and Mountain View?

A: (me)

  • from personal experience, takes 1 hr to drive from SF to MTV
  • assume speed limit is 50 MPH
  • 1hr * 50 MPH = 50 miles between SF and MTV
  • ask interviewer when are we observing: rush hour @ 9AM
  • assume cars are in gridlock traffic, 5 ft behind car in front
  • assume 101 spans 4 lanes
  • assume car length is 20 ft, car width is 5 ft
  • 50 miles * 5,280 ft/miles ≈ 260,000 ft between SF and MTV
  • 260,000 ft / 25 ft of car + space length = 10,400 cars per lane (one-way)
  • 10,400 cars * 4 lanes = 41,600 cars one-way
  • 41,600 cars * 2 ≈ 80,000 cars two-way

*need to interact and ask interviewer for scope-- i.e. what time, etc.
*didn't take into account freeways being two-ways
*remember measurement conversions (1 mile = 5,280 ft)


June 24, 2018

Q: (T) Assume you are new to Airbnb and have never booked a place with the service before. You are reviewing a unit’s details (web page) and like all the details of the unit. How can Airbnb increase the likelihood that you book this room right away? Assume that Airbnb has already implemented basic services such as free cancellation, good UX, etc.

A: (me) 

Q: (me) How many dentists are there in New York?

A: (T)

Q: (me) How would you improve the Uber app?

A: (T)