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Google interview notes, page 101 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·Software Engineer·Technical Phone Screen

May 2026
Google SWE coding round, one question the whole session. Stack-based string decoding. Nothing crazy but it took me a bit to get the recursion angle right.
  • Given an encoded string in the format k[encoded_string], decode it so that the encoded_string is repeated exactly k times. For example, '3[a]2[bc]' becomes 'aaabcbc'.

“My first instinct was recursion but I fumbled explaining it out loud.”

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Google·Software Engineer·Technical Phone Screen

May 2026
Google SWE interview with a pattern matching design problem that's nastier than it looks on the surface. The core ask was building a rule engine, and if you haven't thought carefully about wildcard semantics before, you'll probably underestimate it like I did.
  • Design a rule engine that takes a binary string as input and matches it against a list of (pattern, value) pairs, where each pattern can contain '0', '1', and '*' (where '*' matches any substring including empty). The match function should return the value of the longest matching pattern, with ties broken by list order.

“I went straight to regex and said we could just compile each pattern and run them all.”

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Google·Software Engineer·Recruiter / HR Screen

May 2026
Standard culture-fit screen for a Research Scientist role at Google, ran about 15-30 minutes. Pretty much what you'd expect from a recruiter call: nothing technical, just the usual 'why us' and 'what do you want' stuff.
  • Why are you interested in Google, and how do you see us as different from our competitors?
  • What conditions or environment do you need in order to do your best work?
  • What are you looking for in your next role?

“This is basically two questions stitched together and they expect a real answer, not just 'scale and impact.' I fumbled a bit because I hadn't thought hard enough about what actually separates Google Research from the other big labs.”

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Google·Product Manager·Onsite - Behavioral / Leadership

May 2026
Google PM behavioral round, one question about working with engineers to get something built. Pretty standard but the specifics matter more than you'd think.
  • Describe a situation where you had to persuade engineers to build a feature they were resistant to.

“I went straight into the story and forgot to set up why the engineers were skeptical in the first place, which is kind of the whole point of the question.”

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Google·Software Engineer·Onsite - Coding / Algorithms

May 2026
Google SWE coding round with a tricky Morse code decoding problem. The core challenge was handling ambiguous splits with no delimiters, plus outputting both a count (mod 1e9+7) and the lexicographically smallest K decoded strings.
  • Given a continuous Morse code string with no delimiters between letters and a custom mapping of up to 26 letters to their codes, write a program that outputs the total number of valid decodings (mod 1,000,000,007) and the lexicographically smallest up to 10 decoded strings.

“The counting part felt approachable once I framed it as a DP over positions in the string, basically dp[i] = number of ways to decode the first i characters.”

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Google·Product Manager·Onsite - Product Sense / Strategy

May 2026
Google product case focused on ad relevance for YouTube. One question, pretty open-ended, and the monetization angle made it tricky to scope quickly.
  • Should Google introduce an 'ad quality' score for YouTube that measures how relevant an ad is to the video it appears on, and how would this factor into advertiser bidding and pricing?

“I spent too long on the 'should they do it at all' part and barely got to the pricing mechanics, which was clearly the more interesting half of the question.”

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Google·Software Engineer·Onsite - System Design / Architecture

May 2026
Got a system design question for a data engineer role at Google. Just the one question but it had a lot of surface area and I don't think I covered it as well as I should have.
  • Design a data warehouse schema for Amazon.

“I went straight for a star schema with a fact table for orders and dimensions for products, customers, time, and sellers.”

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Google·Product Manager·Onsite - Product Sense / Strategy

May 2026
PM interview at Google with a classic estimation question about SFO airport traffic. Short and focused, nothing too wild.
  • Estimate the number of passengers flying in and out of SFO on a typical day.

“I started with US air travel volume and tried to work down to SFO's share based on it being a major west coast hub.”

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Google·UX Designer·Onsite - Multi Round

May 2026
Went through a fast-tracked onsite loop at Google for a UX Designer role where the hiring manager had final say instead of a central committee. Five rounds total, four of which felt strong, but the cross-functional PM round has me second-guessing myself because I basically went full solo brainstorm mode when the whole point was to show collaborative instincts.
  • Walk us through your portfolio. How did you structure your narrative and what design decisions are you most proud of?
  • Given a live design prompt, produce end-to-end workflows and mid-fidelity designs within the session time, then defend your decisions under follow-up questioning.
  • The interviewer's prompt structure broke down mid-session. How do you handle an unstructured or ambiguous interview situation when the interviewer themselves seems lost?
  • A product team is facing a real, ambiguous problem right now. How would you approach solving it, and how do you involve cross-functional partners throughout the process?

“One of the panelists lit up about the storytelling structure, which was a relief because I'd spent way too long agonizing over the deck flow.”

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Google·Software Engineer·Onsite - Behavioral / Leadership

May 2026
Google behavioral round, one question but they really wanted you to sit in it for a while. They kept pushing for a second example which I wasn't fully prepared for.
  • Tell me about a time you disagreed with someone. Walk through how you handled it, how you communicate through conflict, and how you find common ground to move things forward. They want more than one example.

“The multi-example part is what gets you.”

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