Nvidia coding interview

Questions Nvidia asks in this round 16

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  Graphics test developer screen: CI, Docker, Python and compilersCodingA screen for a graphics software test developer that is all fundamentals and a deep look at your projects. Expect detailed questions on every tool on your resume: Docker (running…

  Possibly retiredWere you asked this too?
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  Streaming top-K frequent elements with O(1) updatesCodingElements arrive one at a time from an unbounded stream. Design a structure that can report, at any moment, the K elements seen most often so far. Clarify what K is and whether it…

  Last asked Sep 2026Were you asked this too?
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  Thread-safe reference-counted smart pointer in C++CodingImplement a reference-counted smart pointer class template in C++ from scratch, in the spirit of std::sharedptr. Several owners can share one object; it is destroyed exactly once…

  Last asked Sep 2026Were you asked this too?
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  Encode and decode strings with length prefixes and count codesCodingSerialize a list of arbitrary strings into one string and back without ambiguity. A second variant decodes a compact code where some letters are written as two digits with a…

  Last asked Apr 2026Were you asked this too?
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  Transpose a matrix and reason about memory layoutCodingTranspose a square or rectangular matrix, in place where possible. Then discuss row-major versus column-major storage, cache behaviour, and how to make the transpose fast for very…

  Last asked Apr 2026Were you asked this too?
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  Write a 2-D convolution, a biased attention step and a training loopCodingImplement small ML building blocks from scratch: a 2-D convolution in NumPy, an attention step with an added bias term before the softmax, and the missing pieces of a standard…

  Last asked Dec 2025Were you asked this too?
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  3SumCodingReturn every unique triple of values in an integer array that adds up to zero, with no duplicate triples in the answer. Aim for O(n^2) time after sorting.

  Last asked Oct 2025Were you asked this too?
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  Python practicals: debug async code, find files by pattern, read nested JSONCodingA set of short practical Python tasks: 1. Read a helper class that keeps pulling data from a response and writing it out, and explain what it is for. 2. Debug a piece of…

  Possibly retiredWere you asked this too?
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  Collect host metrics and post them to a serverCodingOn a Linux VM, gather CPU, memory and disk usage, send them as JSON in an HTTP POST to a given endpoint, and then flag any metric above a threshold.

  Last asked Oct 2026Were you asked this too?
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  Hardware design verification fundamentalsCodingDiscuss and sketch verification for common hardware blocks: a FIFO, a round-robin arbiter and a valid/ready handshake. Cover scoreboards and reference models, constrained random…

  Last asked Sep 2026Were you asked this too?
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  Merge sorted arrays, then sort files too large for memoryCoding1. Merge two sorted arrays of integers into one sorted array. 2. The two inputs are now huge files that don't fit in memory. Merge them with bounded memory and buffered reads and…

  Last asked Sep 2026Were you asked this too?
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  Can repeated pair additions reach a target pointCodingFrom a starting point (x, y) you may move to (x + y, y) or (x, x + y). Decide whether a target point is reachable, efficiently even for very large coordinates.

  Last asked Jul 2026Were you asked this too?
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  Count substrings whose characters are all distinctCodingReturn how many non-empty contiguous substrings of a string contain no repeated character, in linear time.

  Last asked Jul 2026Were you asked this too?
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  Build, validate and prune a computation graphCodingImplement a small graph of neural-network operations: add nodes and dependencies, check structural rules, detect cycles, and remove branches that do not contribute to the required…

  Last asked Feb 2026Were you asked this too?
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  Short systems utility tasks: spikes, logs and bracketsCodingSolve a few short utility problems: detect a sudden temperature spike in timestamped CPU readings, check that brackets in an expression balance, and aggregate log lines by status…

  Last asked Feb 2026Were you asked this too?
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  Optimize a small-string class in C++CodingBuild a high-performance C++ string class for a workload with very many strings, supporting operations such as compare, concatenate and substring. Short strings live in a…

  Last asked Dec 2025Were you asked this too?