Coding questions

1,899 resources · Page 41 of 80

1. Coding questions · Glean

   Find Which Words From a List Can Be Traced Through Adjacent Cells of a Letter Grid

   Given a letter grid and a list of words, return every word that can be spelled by a path of edge-adjacent cells without reusing a cell, sorted lexicographically. Covers the single-word search and its many-words follow-up, and tests backtracking and pruning on a large word list.

2. Coding questions · ByteDance

   Find Words in a Character Grid

   This question evaluates algorithm design for efficient multi-word search in a character grid, testing competencies in constrained graph traversal, managing large dictionaries, and selecting data structures for efficient lookup.

3. Coding questions · Strava

   First Climb in Elevation Samples, Strict and With a Tolerated Partial Descent

   Given elevation samples taken at regular intervals, return the start and end indices of the first climb, first under strict rules where elevation may never drop and then allowing a temporary descent limited to a fraction of the gain so far. Tests precise index semantics, lookahead and careful state tracking.

4. Coding questions · Databricks

   First-Match CIDR Firewall: Status of an IP Address or a Whole CIDR Block

   Implement an ordered first-match IPv4 firewall that returns ALLOW or DENY for an address, then extend it so the target can be a whole CIDR block that is allowed only if every address inside it is. Tests bit-level prefix matching and reasoning about address ranges at scale.

5. Coding questions · TikTok

   Fix a BST with two misplaced keys

   This interview question evaluates algorithm design, data structures, correctness, complexity, edge cases, and implementation details in a realistic interview setting. A strong answer for Fix a BST with two misplaced keys states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.

6. Coding questions · Capital One

   Fix dash dates and aggregate watch time

   This question evaluates data-cleaning and aggregation competencies, focusing on handling nonstandard missing-date markers, forward-filling in spreadsheets, correct date-range filtering, pivot-table summarization, and concise pandas grouping and aggregation.

7. Coding questions · Waymo

   Fixed-Capacity Least-Recently-Used Cache Driven by Get and Put Operations

   Design a fixed-capacity least-recently-used cache as an object-oriented exercise, driven here by a list of get and put operations whose read results you return. Tests O(1) lookup, recency updates on reads and writes, and correct eviction order.

8. Coding questions · Tesla

   Flatten a Linked List with Nested Side Branches into One Doubly Linked List

   A linked list whose nodes may each carry one side branch, with branches nested like a binary tree, must be flattened into a single doubly linked list with every branch spliced between its parent and the parent's original successor. It tests pointer rewiring, ordering rules for nested branches, and handling very deep nesting.

9. Coding questions · Robinhood

   Flatten Fractional-Share Inventory and Record Trade Logs

   Process fractional-share buys and sells with exact hundredth units, whole-share market flattening, dollar-order conversion, and ordered inventory-perspective logs.

10. Coding questions · TikTok

    Flatten object & Promise.all

    This question evaluates proficiency in JavaScript data manipulation and asynchronous programming, testing competencies in transforming nested objects into single-level key paths and reproducing Promise.all semantics.

11. Coding questions · Box

    Flip a specific bit in an integer

    This question evaluates a candidate's understanding of bitwise operations and low-level integer manipulation, along with the ability to reason about the time and space complexity of bit-level operations.

12. Coding questions · Meta

    Forecast Next Year's Revenue Using YoY% Analysis

    This question evaluates data manipulation and time-series analysis skills, including rolling aggregations and year-over-year percentage calculations using SQL or Python.

13. Coding questions · TikTok

    Format messages with paginated suffixes

    This question evaluates string-processing and algorithm-design skills, including handling variable-length metadata, preserving character order, managing boundary cases, and formal time/space complexity reasoning.

14. Coding questions · Robinhood

    Fractional Share Orders: Keep Brokerage Inventory Below One Share

    A coding question about a brokerage that fills fractional-share orders from a small inventory while the exchange trades only whole shares. Given buy and sell orders in hundredths of a share or in dollars, plus the starting inventory, compute each stock's final inventory, which must stay non-negative and below one share after every order.

15. Coding questions · IBM

    Function Signature Lookup with Exact and Variadic Parameter Matching

    A coding question about an IDE-style signature lookup engine: given registered functions, some whose last parameter is variadic, return for each call the sorted names of every function that accepts its argument types. It tests exact type-sequence matching, zero-or-more variadic arguments and edge cases such as empty argument lists.

16. Coding questions · Databricks

    Generalized m x n Tic-Tac-Toe with a k-in-a-Row Win Check

    Implement tic-tac-toe on an m by n board where a player wins with k consecutive marks in a row, column or either diagonal, returning the winner after each move. Tests incremental win detection that avoids rescanning the board, plus careful handling of edges and both diagonal directions.

17. Coding questions · LinkedIn

    Generate All Distinct Permutations of a List with Duplicate Values

    Given a list of up to eight integers that may contain duplicates, return every distinct permutation exactly once, sorted in lexicographic order. It tests systematic enumeration, avoiding duplicate results caused by equal values, and producing a deterministic output order.

18. Coding questions · PayPal

    Generate Bigrams Using Python List Comprehension and Zip

    This question evaluates proficiency in Python programming, particularly list comprehension, string tokenization, and sequence manipulation for generating consecutive word bigrams.

19. Coding questions · Kickoff

    Generate boolean truth table

    This question evaluates understanding of parsing, boolean expression semantics, and algorithmic enumeration, including tokenization, operator precedence, exhaustive evaluation over variable assignments, and handling of invalid inputs.

20. Coding questions · Ngrok

    Generate Color Feedback for a Word Guess

    Generate green, yellow, or red feedback for each character in a word guess based on positional equality and presence anywhere in the answer. Follow the stated presence semantics, where misplaced duplicate letters remain yellow rather than consuming a limited match count.

21. Coding questions · Meta

    Generate Daily Unique User Views for Each Shop

    This question evaluates a candidate's ability to perform data manipulation and aggregation using SQL (and optionally Python), focusing on counting unique users per shop by calendar date and handling date-based filtering.

22. Coding questions · OpenAI

    Generate Data Labeling Schedules

    This question evaluates combinatorial reasoning and constructive algorithm design for generating constrained assignment schedules, including ensuring each human appears a minimum number of times, preventing duplicate human-task pairs, and managing valid ID ranges.

23. Coding questions · Roblox

    Generate Friendship List with Acceptance Dates Using Pandas

    This question evaluates proficiency in data manipulation and relational reasoning using Python/pandas, focusing on transforming event logs into canonical pairwise relationships and extracting activation timestamps.

24. Coding questions · Coinbase

    Generate NFT metadata and ensure uniqueness

    This question evaluates understanding of combinatorics, deterministic pseudo-random generation, and efficient enumeration for producing unique NFT metadata, measuring competency in algorithm design, state-space management, and handling large-scale outputs.