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Google interview notes, page 142 of 215

FAANG / Big Tech

Most of these Google write-ups come from Software Engineers (1,167), then Product Managers (686) and Data Scientists (125). The most reported rounds are the product sense round (667), the technical phone screen (660), the behavioral / leadership round (252) and the onsite coding round (214).

2146 interview notes · updated Oct 2026

Google·Product Manager·Onsite - Product Sense / Strategy

Jun 2026
Google PM interview, one question about accessibility that sounds deceptively simple but has a lot of surface area if you're not careful about scoping.
  • Name a product with poor accessibility. How would you improve it, and how would you measure whether your improvements worked?

“I picked a product fast without really thinking through whether I could actually say something interesting about it.”

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Google·Software Engineer·Technical Phone Screen

Jun 2026
Google SWE coding round focused on a sampling problem. The interviewer had you pseudocode first before writing actual code, which was a reasonable constraint but still caught me a bit off guard mid-interview.
  • Write a sampling program. The interviewer may ask about reservoir sampling, weighted sampling, or rejection sampling depending on the use case. Start by clarifying which variant is needed, then describe your approach in pseudocode before moving to a full implementation.

“The pseudocode-first constraint sounds easy but it actually slowed me down because I kept wanting to just write code.”

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Google·Software Engineer·Onsite - System Design / Architecture

Jun 2026
Google onsite system design round, one question the whole time: build Find My iPhone. They wanted you to think about privacy and security alongside the core architecture, which honestly changes the whole problem.
  • Design a location-tracking system similar to Find My iPhone, with attention to privacy, security, and efficiency.

“I jumped straight into the location update pipeline and data storage before even touching privacy, which I could tell was the wrong move pretty quickly.”

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Google·Product Manager·Executive / Final Round

Jun 2026
PM interview at Google that basically asked me to be a consultant for 45 minutes. One big meaty question about Model-Based Engineering, pitched to a hypothetical exec audience. Felt more like a strategy presentation than a product interview.
  • Walk a non-technical Google executive through Model-Based Engineering: what it is, why it matters for hardware development, the benefits and trade-offs compared to traditional approaches, and a phased rollout plan covering tooling, process changes, and success metrics.

“This was the whole interview.”

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Google·Software Engineer·Onsite - Coding / Algorithms

Jun 2026
Google SWE coding round with a grouping/digit-matching array problem. Pretty clean problem statement but the edge cases can sneak up on you if you're not careful about how you enumerate digits.
  • Given an array of two-digit numbers, find the maximum number of elements you can select such that all selected numbers share at least one common digit.

“My first instinct was to sort or group by digit, which is roughly right, but I spent too long thinking about it as a set intersection problem across all pairs.”

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Google·Product Manager·Onsite - Product Sense / Strategy

Jun 2026
Interviewed at Google, product-sense style question about commuter train passengers. Short post, minimal context, but the question itself is the kind that can spiral in a lot of directions if you're not careful about scoping.
  • What are the top three pain points experienced by commuting train passengers?

“My first instinct was to just list things off the top of my head, which is probably the wrong move.”

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Google·Product Manager·Onsite - Product Sense / Strategy

Jun 2026
Interviewed for a PM role at Google and got hit with a market sizing question about wine consumption. Pretty standard estimation exercise but it's the kind of thing that trips you up if you haven't practiced structuring your assumptions out loud.
  • How many bottles of wine are opened per day (globally or in a given market)?

“I fumbled the setup a bit.”

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Google·Product Manager·Onsite - Product Sense / Strategy

Jun 2026
Google PM interview with a single open-ended product design question about building something for bar-goers. Not much else to go on from what I remember.
  • What product would you design for the 100+ million people who regularly go out to bars?

“Big open canvas, which sounds fun until you're actually staring at it.”

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Google·Software Engineer·Onsite - Coding / Algorithms

Jun 2026
Google SWE coding round, got a matrix rotation problem. Pretty standard on the surface but the follow-up about in-place vs extra space is where things get interesting.
  • Given an n by m matrix, rotate it 90 degrees clockwise and return the result. Your solution should handle non-square dimensions. Follow-up: is O(1) extra space achievable, and does it matter whether n equals m?

“The base case wasn't bad, just transpose and reverse logic, but I fumbled the follow-up.”

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Google·Product Manager·Onsite - Product Sense / Strategy

Jun 2026
Google PM interview with a product sense question about a pretty analog product. Short session, just the one question from what I can tell, but it required more structure than I expected going in.
  • What two new features would you add to a car garage?

“I blanked for a solid few seconds because I kept waiting for a tech product.”

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