Google Software Engineer Interview Questions
Google Software Engineer interview questions typically test core algorithmic problem solving, clean coding under time pressure, and — for mid-to-senior levels — system design and scalability thinking. The process is multi-stage: a recruiter screen followed by one or two timed technical screens (often live coding on a shared Google Doc), then a virtual or onsite loop with several 45-minute interviews that mix coding, design (L4/L5+), and behavioral “Googleyness” assessments. Interviewers evaluate general cognitive ability, role-related technical depth, leadership, and culture fit, and candidates should expect iterative feedback and a hiring-committee review before team matching. ([leetcopilot.dev](https://leetcopilot.dev/blog/google-coding-interview-guide-2026?utm_source=openai)) For interview preparation focus on timed practice of data-structures and algorithms, simulate coding on Google Docs, and prepare concise STAR-style stories that show impact and collaboration; senior candidates must add targeted system-design drills that discuss trade-offs, reliability, and scaling. Allow several weeks of structured practice, rehearse clear verbal explanations, and be ready to ask clar
"I got asked a hardcore MCM DP question and I saw it on PracHub as well. Solved that question in 5 minutes. Without PracHub I doubt I could solve it in 5 hours. Though somehow didn't get hired, perhaps I guess I solved it too fast? /s"
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Answer project deep-dive and Why Google questions
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Implement an LRU cache
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Solve checksum and dependency debugging tasks
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Generate all subsets (handle duplicates)
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Find shared objects across two log files
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Design set with O(1) random access
Design a data structure ("FancySet") that stores unique integers and supports the following operations, each in average O(1) time: - add(x): Insert va...
Design a Twitter hashtag metrics aggregator
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Check if all substrings are dictionary words
You are given a string s (letters only) and access to an English dictionary dict (a set of valid words). Return true if every contiguous substring of ...
Determine if a 14-tile hand is winning
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Describe conflict resolution and stakeholder management
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Build a bigram next-word predictor with weighted sampling
You are given a training set of token sequences (sentences), for example: ` [["a","b","c"], ["a","s","d"]] ` 1) Train a simple next-word prediction m...
Answer collaboration, ambiguity, growth, and failure questions
Behavioral Interview Prompts Answer the following prompts using a structured format (e.g., STAR: Situation, Task, Action, Result). Assume the intervie...
Design relational-to-NoSQL migration pipeline
System Design: Migrate From Relational DB to a NoSQL Key-Value Store with Snapshot + CDC Context You need to migrate data from an OLTP relational data...
Design a key-value store
System Design: Scalable Key–Value Store with Range Scans You are asked to design a distributed key–value (KV) store that supports the following operat...
Implement iterator merging lists with filtering
Problem Implement an iterator (or generator) that iterates over two input sequences: - favorites: a list of item IDs (or objects with an id field) - p...
Find median of merged RLE arrays
Problem You are given two run-length encoded (RLE) arrays A and B. Each is sorted by value in non-decreasing order. - Each element is a pair (value, f...
How do you handle workplace conflict scenarios?
Answer the following conflict-focused behavioral questions. Use concrete examples from your experience. 1. Conflict with a peer: Describe a time you h...
Find cheapest common ancestor in a tree
Coding You are given a rooted tree where each node has: - an integer price - a pointer to its parent (root has parent = null) - a list of children Giv...
Find right-side view of binary tree
You are given the root of a binary tree. From the right side of the tree, at each depth you can see exactly one node: the rightmost node at that depth...
Compute distance-sum from every tree node
Problem You are given an undirected tree with n nodes labeled 0..n-1 and a list of n-1 edges. The tree is connected and contains no cycles. For each n...