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Answer: Databricks SDE OA 2025 | Petabyte Scale Dot Product & Spark Cluster Job Executio
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Sahil Jain
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Solution - Petabyte Scale Dot Product Strategy Since both sparse vectors are already sorted by index, use the Two Pointer technique t…
Answer: OpenAI MTS OA 2026 | Transactional Key Value Store & Token Context Window Utiliz
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Sahil Jain
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Solution - Transactional Key Value Store Strategy Maintain a stack of hash maps where each map represents a transaction layer. The…
Answer: CoinDCX SDE OA 2025 | Suspicious Transaction Ring & Smart Contract Ledger
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Solution - Suspicious Transaction Ring Strategy Model wallet transfers as a directed graph and detect whether any cycle exists. Ap…
Answer: MongoDB SDE OA 2025 | B-Tree Index Scan Intersection & MVCC Time Travel Store
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Solution - B-Tree Index Scan Intersection Strategy Perform a K-Way Merge using a Min Heap to process sorted index scans efficiently. …
Answer: Tower Research Capital SDE-1 OA 2025 | Arbitrage Detector & Limit Order Book Mat
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Solution - Arbitrage Detector Strategy Transform multiplicative exchange rates into additive edge weights using logarithms and detect…
Answer: Uber SDE OA 2025 | Concatenated Multiples of K & Uber Surge Equilibrium
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Sahil Jain
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Solution - Concatenated Multiples of K Strategy Use Modulo Arithmetic and Length-Based Hash Maps to count valid concatenation pairs e…
Answer: Nvidia SDE OA 2025 | Semiconductor Signal Routing & Parallel Trace Routing
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Sahil Jain
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Solution - Semiconductor Signal Routing Strategy Greedy Bit-by-Bit Validation combined with BFS Reachability Checking. Approach …
Answer: Unacademy SDE OA 2024 | Educator Network & Gamification Target
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Sahil Jain
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Solution - Educator Network Strategy Apply Tree Dynamic Programming using DFS and maintain two states for every node: selected and no…
Answer: Jio SDE OA 2024 | Maximize Network Points & JioFiber Grid Routing
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Solution - Maximize Network Points Strategy Use a Greedy Stack-based approach that removes the higher-value substring first and the l…
Answer: CrowdStrike SDE-1 OA 2025 | Malicious Subnet Filtering & Bypassing the Firewall
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Solution - Malicious Subnet Filtering Strategy Store all blocked subnet prefixes in a Trie and perform efficient prefix matching for …
Answer: Dream11 SDE-1 OA 2025 | Fantasy Team Selection & Master Server Placement
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Solution - Fantasy Team Selection Strategy Use Constrained 0/1 Knapsack Dynamic Programming where both budget and number of selected …
Answer: MakeMyTrip SDE-1 OA 2025 | Holiday Flight Network & Deepest Itinerary Anchor
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Solution - Holiday Flight Network Strategy Perform a level-based BFS while tracking the minimum cost to reach each city within the al…
Answer: Sprinklr SDE-1 OA 2025 | Viral Campaign & Stable Sentiment Window
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Solution - Viral Campaign Strategy Use Multi-Source Breadth First Search to simulate simultaneous propagation from all influencer nod…
Answer: Rapido SDE-1 OA 2024 | Maximize Captain Earnings & Bottleneck Traffic Routing
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Solution - Maximize Captain Earnings Strategy Use Weighted Interval Scheduling with Dynamic Programming and Binary Search. Approac…
Answer: Twilio SWE Interview Question 2023 October | Backtracking | on-campus
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Solution 1: Word Search — DFS Backtracking Approach This is a classic grid-based search problem that can be solved using **Dept…
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