Scale AI coding interview

Questions Scale AI asks in this round 17

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  Task scheduler that pops the earliest deadline once its subtasks are doneCodingImplement a class with addtasks(tasks) and consumetask(). Each task has an id, a deadline and a list of subtasks. 1. consumetask returns the task with the earliest deadline, or a…

  Last asked May 2026Were you asked this too?
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  CSV upload endpoint that classifies rows with an LLMCodingA practical round: build a service endpoint that takes an uploaded CSV, sends each row to a language model to classify it, and returns the results as JSON. Write the prompt and…

  Last asked Jul 2026Were you asked this too?
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  Party hours and quiet gaps by neighborhood and cityCodingA community events app records every party in two separate lists that share a partyId: - partyWindows: rows of partyId, start, end. start and end are hours as strings, and a party…

  Last asked Dec 2025Were you asked this too?
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  Shuffle, deal and sort a four-player card handCodingYou are building the core of a four-player card game. Model a standard 52-card deck and implement the deal. Types to define - Suit: CLUBS, DIAMONDS, HEARTS, SPADES, in this order…

  Last asked Aug 2026Were you asked this too?
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  Update a grid of firing neuronsCodingA grid holds neurons that are either firing or not. In each step every neuron's next state depends on how many of its neighbours are firing, in the style of the Game of Life…

  Last asked Feb 2026Were you asked this too?
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  Implement multi-head attention and LLM samplingCodingImplement multi-head self-attention from scratch, then the sampling step of a language model: given logits, pick the next token with temperature, top-k and top-p (nucleus)…

  Last asked Feb 2026Were you asked this too?
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  Debug a project-assignment codebaseCodingYou get a small codebase spread over several files that assigns projects (for example to students or courses). Some tests fail. Read your way around it under time pressure, find…

  Last asked Jan 2026Were you asked this too?
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  Angle between clock handsCodingGiven a time in hours and minutes, return the smaller angle between the hour hand and the minute hand.

  Last asked Dec 2025Were you asked this too?
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  Load balancer with worker states, a priority queue and autoscalingCodingIn a time-boxed backend round, write a small load balancer in Python. Workers move through states (for example starting, idle, busy, draining), requests go to workers through a…

  Last asked Dec 2025Were you asked this too?
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  Lowest common ancestor in an N-ary treeCodingGiven the root of an N-ary tree and two of its nodes, return their lowest common ancestor. Use one depth-first pass in which each subtree reports whether it contains each of the…

  Last asked Dec 2025Were you asked this too?
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  React hook for API data and UI changes in a starter appCodingIn a starter React app with API and UI code already written: write a hook that fetches data from the API and converts it to the shape the UI needs, then change the UI as asked…

  Possibly retiredWere you asked this too?
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  Write a text parser and fix the bugs in an ML projectCodingIn a one-hour round on an existing ML project: first write a parser that turns raw text data into the format the project needs, then find and fix three bugs elsewhere in a fairly…

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  Count stable server segmentsCodingA row of n machines has integer capacities capacity0..n-1. A contiguous segment l, r is stable when all of these hold: 1. It contains at least 3 machines (r - l = 2). 2. The two…

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  Cross the most walls on a number line with limited energyCodingWalls stand at distinct non-zero integer points on an infinite number line. Wall k is at positionsk and costs costsk = 0 energy to cross. You start at 0 with energy units. Each…

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  Distinct OR values of increasing subsequencesCodingGiven an integer array arr, define the goodness of a sequence as the bitwise OR of all its elements. The goodness of the empty sequence is 0. A subsequence keeps elements in their…

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  Minimum distance between two nodes in an N-ary treeCodingYou are given the root of an N-ary tree. Every node has an integer val, unique within the tree, and a list children of its direct children. There are no parent pointers…

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  Poker hand checker with jokersCodingWrite isvalidhand(hand: liststr) - bool for a five-card poker game. Each card is a string "<rank of <suit". The rank is 2 to 10, J, Q, K or A. The suit is hearts, diamonds, clubs…

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