Leading technology company specializing in search, cloud, and AI.
4 Rounds
~21 Days
Very Hard
The Interview Loop
Recruiter Screen (30 min)
Standard fit check, behavioral questions, and resume overview.
Technical Loop (3-4 Rounds)
Deep dive into domain knowledge, coding, and system design.
Interview Question Bank
Software Engineer
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Behavioral
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medium
Tell me about a time you discovered a significant flaw in a system's architecture right before a major launch. How did you balance the need to ship on time with the need to fix the technical debt?
#Googlyness
#Decision Making
#Risk Management
#Communication
Software Engineer
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Behavioral
•
medium
Describe a time when you had to lead a project across multiple timezones or distributed teams. How did you ensure alignment and handle communication breakdowns?
#Cross-functional Collaboration
#Leadership
#Project Management
Software Engineer
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Behavioral
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medium
Tell me about a time you had to pivot your technical approach completely because of changing business requirements from product managers. How did you manage the transition and team morale?
#Adaptability
#Conflict Resolution
#Team Dynamics
Software Engineer
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Behavioral
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medium
Tell me about a time you pushed back on a product manager's feature request because you believed it would negatively impact system latency or reliability. How did you resolve the conflict?
#Communication
#Googlyness
#Prioritization
#Conflict Resolution
Software Engineer
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Behavioral
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medium
Describe a situation where you had to navigate a highly ambiguous project with no clear technical direction. How did you define the milestones and deliver the solution?
#Ambiguity
#Project Management
#Googlyness
Software Engineer
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Behavioral
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easy
Tell me about a time you discovered a critical bug or security vulnerability in a production system. What was your immediate action, and how did you ensure it wouldn't happen again?
#Incident Management
#Post-mortem
#Ownership
Software Engineer
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Coding
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medium
You are given a map represented as a 2D grid where 0 is a road, 1 is a building, and 2 is an EV charging station. Given a starting position, find the shortest path to an EV charging station. Follow-up: How would you optimize this if we have millions of queries per second for different starting positions on a static map?
#Graph Theory
#BFS
#Dynamic Programming
#Caching
Software Engineer
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Coding
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hard
Given a list of daily budgets and expected returns for various Google Ads campaigns, write an algorithm to allocate a total budget B to maximize the overall return. You can allocate partial budgets to campaigns, but returns diminish non-linearly.
#Dynamic Programming
#Greedy Algorithms
#Optimization
#Math
Software Engineer
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Coding
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medium
Implement a system for Google Calendar that takes in a list of N users' daily schedules (lists of busy intervals) and their working hours, and returns all available time slots of duration T where all N users can meet.
#Intervals
#Sorting
#Two Pointers
#Arrays
Software Engineer
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Coding
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hard
Design a data structure for Google Search autocomplete. It must support inserting a string with a frequency, and querying the top K most frequent strings that start with a given prefix. Optimize for query latency.
#Trie
#Priority Queue
#Design
#String Manipulation
Software Engineer
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Coding
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medium
Given a stream of user watch events on YouTube (user_id, video_id, timestamp, duration_watched), write a function to find the longest contiguous sequence of videos a user watched where they completed at least 90% of each video.
#Sliding Window
#Hash Map
#Stream Processing
Software Engineer
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Coding
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hard
You are building a feature for Google Docs. Given a string representing a document and a list of operations (insert, delete, replace at specific indices), apply the operations efficiently. How do you handle overlapping operations?
#String Manipulation
#Operational Transformation
#Design
Software Engineer
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Coding
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medium
Implement a thread-safe LRU (Least Recently Used) cache. This cache will be used in a high-throughput microservice. Explain how you would minimize lock contention.
#Concurrency
#Data Structures
#Linked List
#Hash Map
Software Engineer
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Coding
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hard
You are given a map represented as a weighted directed graph. You need to route an electric vehicle from point A to point B. The EV has a maximum battery capacity, and certain nodes have charging stations. Find the shortest path such that the EV never runs out of battery.
#Graphs
#Dijkstra's Algorithm
#State Space Search
Software Engineer
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Coding
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hard
Design a data structure for Google Search Autocomplete that supports adding new search queries, updating the frequency of a query, and retrieving the top 'k' most frequent queries that start with a given prefix in real-time.
#Trie
#Heap
#Hash Map
#Design
Software Engineer
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Coding
•
medium
Given a list of Google Calendar events for 'n' users, where each event consists of a start and end time, and a required meeting duration 'k', find all available time slots where all 'n' users can attend a meeting.
#Intervals
#Two Pointers
#Sorting
Software Engineer
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Coding
•
medium
You are given a stream of Google Ads click events. Implement a sliding window counter that returns the number of clicks in the exact last 5 minutes. The stream is highly concurrent.
#Concurrency
#Sliding Window
#Queues
#Data Streams
Software Engineer
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Coding
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hard
Given a 2D grid representing a Google Maps satellite image where '1' is land and '0' is water, find the minimum number of days to connect two disconnected islands. You can change one '0' to '1' per day.
#BFS
#DFS
#Matrix
Software Engineer
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Coding
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medium
You are given an array of integers representing the CPU load of a Google server cluster over time. Find the maximum contiguous subarray sum, but you are allowed to delete exactly one element to maximize the sum.
#Dynamic Programming
#Arrays
#Kadane's Algorithm
Software Engineer
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Coding
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medium
Implement a function to evaluate a mathematical expression given as a string (e.g., '3 + 5 / (2 - 1) * 4'). The expression can contain parentheses, and you must follow standard order of operations. This is used in Google Search's calculator widget.
#Stacks
#String Parsing
#Math
Software Engineer
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System Design
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hard
Design Google Search's ranking pipeline.
#Ranking
#Scale
Software Engineer
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System Design
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hard
How would you design a distributed key-value store like Bigtable?
#Key-Value Store
Software Engineer
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System Design
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hard
Design the block-level file synchronization mechanism for Google Drive. How do you handle concurrent edits offline, minimize bandwidth for large files, and resolve conflicts when the client reconnects?
#Distributed Systems
#Data Synchronization
#Concurrency
#Network Optimization
Software Engineer
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System Design
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hard
Design a distributed, highly available rate limiter for Google Cloud APIs. It needs to support millions of requests per second, enforce limits per customer per API, and add minimal latency to the critical path.
#Distributed Caching
#Token Bucket
#Redis
#High Availability
Software Engineer
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System Design
•
hard
Design the real-time view counter for YouTube live streams. The system must handle massive spikes in traffic (e.g., a Super Bowl stream) and provide eventually consistent view counts to the UI with sub-second latency.
#Stream Processing
#Event Sourcing
#Scalability
#Data Aggregation
Software Engineer
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System Design
•
hard
Design a distributed web crawler for Google Search. How do you handle DNS resolution bottlenecks, avoid crawler traps, prioritize high-quality domains, and ensure you don't DDoS the target servers?
#Distributed Systems
#Graph Traversal
#Politeness Policies
#Queueing
Software Engineer
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System Design
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hard
Design the backend for Google Docs collaborative editing. How do you handle concurrent edits from multiple users offline and online to ensure eventual consistency?
#Operational Transformation
#CRDTs
#WebSockets
#Concurrency
Software Engineer
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System Design
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medium
Design a distributed rate limiter for Google Cloud API Gateway that can handle millions of requests per second with minimal latency overhead.
#Redis
#Token Bucket
#Distributed Systems
#Hashing
Software Engineer
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System Design
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hard
Design the video recommendation feed for YouTube. Focus on how you would fetch, rank, and serve the recommendations at scale within a 200ms latency budget.
#Machine Learning Infra
#Caching
#Microservices
#Recommendation Systems
Software Engineer
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System Design
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hard
Design Google Photos' auto-backup feature for mobile devices. How do you handle intermittent network connectivity, deduplication, and efficient storage?
#Blob Storage
#Checksum
#Mobile Sync
#Resumable Uploads
Software Engineer
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Technical
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hard
What is MapReduce? How does it work at Google's scale?
#MapReduce
Software Engineer
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Technical
•
medium
Given two tables: `search_logs` (query_id, user_id, query_string, timestamp, region) and `clicks` (query_id, url_clicked, rank_position), write an optimized SQL query to find the top 3 queries with the highest click-through rate in the 'US' region over the last 7 days, partitioned by day.
#Window Functions
#Joins
#Aggregations
#Performance Optimization
Software Engineer
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Technical
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medium
Implement a thread-safe LRU cache in your language of choice. It must support get() and put() in O(1) time, and handle concurrent access from multiple threads without race conditions or deadlocks.
#Concurrency
#Hash Map
#Doubly Linked List
#Mutex
Difficulty Radar
Based on recent AI-sourced data.
Meet Your Interviewers
The "Standard" Interviewer
Senior EngineerFocuses on core competencies, system constraints, and clear communication.
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Think Out Loud
Always explain your thought process before writing code or drawing architecture.