Google Interview Questions

The Google interview loop typically runs in the following order:

1. 1Recruiter screen
2. 2Phone screen (1 coding)
3. 3Onsite: 4–5 rounds (2–3 coding, 1 system design, 1 behavioral / Googleyness)
4. 4Hiring committee + team match

These questions represent patterns seen across multiple Google interview loops reported by candidates in 2024–2026.

1. 1

   Given a stream of integers, return the running median in O(log n) per insert.

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2. 2

   Design Google Drive — storage, sync, sharing, conflict resolution.

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3. 3

   Find all anagrams of a word in a 1-billion-word dictionary efficiently.

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4. 4

   Implement an autocomplete service that responds in <50ms at p99.

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5. 5

   Tell me about a time you worked on an ambiguous problem.

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6. 6

   Design YouTube's recommendation pipeline.

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7. 7

   Given a 2D grid, find the number of distinct islands by shape (not just count).

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8. 8

   Walk me through how Google Search ranks results at a high level.

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9. 9

   Implement a thread-safe LRU cache for a high-throughput service.

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10. 10

    Tell me about a time you made a decision with incomplete data.

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Behavioral rounds at Google map directly to these values. Prepare one STAR story per value.