Coding questions

1,899 resources · Page 24 of 80

1. Coding questions · Upstart

   Decode an anagram sentence using vocabulary constraints

   This question evaluates string manipulation, anagram detection, and constrained dictionary mapping skills, testing attention to character-level constraints and correct disambiguation among similar vocabulary entries.

2. Coding questions · Pinterest

   Decode and Explain Ambiguity in Compression Strings

   This question evaluates parsing of compact count-value encodings, reasoning about ambiguous encodings, and combinatorial enumeration of all valid decodings.

3. Coding questions · C3 AI

   Decompress an encoded string

   Decompress an encoded string evaluates algorithm design, data structures, correctness, complexity, edge cases, and implementation details in a realistic interview setting. A strong answer states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.

4. Coding questions · Upstart

   Decrypt a twice-encrypted message using known pairs

   This question evaluates the ability to reconstruct and compose bijective character-substitution mappings, testing competency in string manipulation, mapping inference, and basic cipher reasoning.

5. Coding questions · Netflix

   Dedupe titles in per-shelf viewport

   This question evaluates algorithmic problem-solving and state management for streaming deduplication with order preservation, testing competencies in data structures, deterministic filtering, and handling constrained visibility windows.

6. Coding questions · Salesforce

   Deduplicate a Linked List

   This question evaluates proficiency in linked list manipulation, in-place data structure modification, and reasoning about time-space trade-offs for removing duplicate elements.

7. Coding questions · Meta

   Define and analyze new-vs-existing activity

   This question evaluates a candidate's competency in cohort definition, time-series event aggregation, use of window functions, cohort-level weighting and bias-aware analytics using SQL and Python.

8. Coding questions · Meta

   Define and compute shop visibility in SQL

   This question evaluates the ability to define and compute shop-level visibility KPIs in SQL, testing skills in metric design (visibility_rate and impression_share), deduplication, session/window filtering, and data-quality concerns such as late-arriving events and bot filtering.

9. Coding questions · Meta

   Define and query shop visibility

   This question evaluates a candidate's ability to design and compute a session‑level visibility metric using SQL and data manipulation techniques, covering joins, date/window handling, deduplication, aggregations, and metric validation.

10. Coding questions · Applied Intuition

    Delete duplicate files via DFS

    This question evaluates a candidate's skills in file-system traversal using DFS/backtracking, duplicate detection across hierarchical directories, and algorithmic techniques such as hashing and efficient data-structure use.

11. Coding questions · Cohere

    Delete One '5' From a Digit String to Get the Largest Number

    Given a digit string containing at least one 5, delete exactly one 5 so the remaining string has the largest possible numeric value, keeping any leading zeros. This intern online-assessment problem tests reasoning about how each digit position affects a number and careful handling of repeated digits.

12. Coding questions · Glean

    Delete the Fewest Parentheses to Balance a String of Only Open and Close Brackets

    Given a string of only open and close parentheses, delete the fewest characters so the rest is balanced and return the resulting string, using standard left-to-right matching to define a unique answer. Tests bracket matching, linear-time scanning and careful handling of leftover unmatched characters.

13. Coding questions · Amazon

    Derive Key Business Metrics Using SQL or Python

    This question evaluates data manipulation and analytical querying skills, including joins, aggregations, conditional classification, and running-window computations in the Data Manipulation (SQL/Python) domain.

14. Coding questions · Amazon

    Design 2D DP on a DAG

    Design 2D DP on a DAG evaluates algorithm design, data structures, correctness, complexity, edge cases, and implementation details in a realistic interview setting. A strong answer states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.

15. Coding questions · Optiver

    Design a balloon stability tracker

    This question evaluates event-driven simulation, time-ordered state management, floating-point numerical evaluation of aggregate functions, and data-structure design for tracking dynamic object states and stability thresholds; it falls under the Coding & Algorithms domain, specifically simulation, event processing, and algorithmic data structures.

16. Coding questions · Meta

    Design a bank system with scheduled transfers

    This question evaluates object-oriented design and stateful system skills, including time-ordered event processing, scheduling and cancellation semantics, balance accounting, and top-k aggregation using appropriate data structures.

17. Coding questions · Tesla

    Design a contiguous segment allocator

    This question evaluates a candidate's competency in designing and implementing efficient data structures for interval management, contiguous memory allocation, fragmentation handling, tag-based resource tracking, and algorithmic complexity analysis.

18. Coding questions · Applied Intuition

    Design a coupon pricing engine

    This question evaluates software design and algorithmic problem-solving skills focused on pricing logic, including handling financial rounding, discount ordering, eligibility criteria across item categories, and time/space complexity analysis.

19. Coding questions · Bloomberg

    Design a data structure for dynamic top‑K frequency

    This question evaluates data structure and algorithm design skills, focusing on frequency counting, dynamic maintenance of top-K elements, and efficient update and query operations in a multiset within the Coding & Algorithms domain.

20. Coding questions · Abnormal Security

    Design a duplicate-file removal algorithm

    Design a duplicate-file removal algorithm evaluates algorithm design, data structures, correctness, complexity, edge cases, and implementation details in a realistic interview setting. A strong answer states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.

21. Coding questions · Amazon

    Design a fixed-capacity circular queue

    This question evaluates understanding of fixed-capacity circular queue data structures, array-based indexing, modular arithmetic, and the requirement for constant-time (O(1)) enqueue/dequeue operations.

22. Coding questions · Amazon

    Design a hierarchical locking tree

    This interview question evaluates algorithm design, data structures, correctness, complexity, edge cases, and implementation details in a realistic interview setting. A strong answer for Design a hierarchical locking tree states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.

23. Coding questions · DoorDash

    Design a hierarchical path registry

    Design a hierarchical path registry evaluates algorithm design, data structures, correctness, complexity, edge cases, and implementation details in a realistic interview setting. A strong answer states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.

24. Coding questions · SoFi

    Design a key-value store with getLast

    Design a key-value store with getLast evaluates algorithm design, data structures, correctness, complexity, edge cases, and implementation details in a realistic interview setting. A strong answer states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.