Arista Networks Coding Interview Questions
9 coding questions reported by candidates who interviewed at Arista Networks, out of 9 Arista Networks questions we track. They average 2.7/5 difficulty (medium). Most common topics: Arista, Linked List, Binary Search, Array. 6 were reported asked within the last year, most recently in October 2026.
Practice Arista Networks questions →Difficulty
- 2/5 — easy3
- 3/5 — medium6
Asked for SWE (9)
Reported Arista Networks coding questions
Find Missing Number in a Sorted Array
3/5Prepare for your Arista Networks interview with this classic algorithmic puzzle about identifying a missing element in a sequentially ordered collection. Given a sequence of unique numbers, your goal is to discover the absent value strictly in logarithmic time. This problem tests your mastery of binary search variations and index-value relationship deductions. Gain access to the complete problem statement and a robust model solution with a subscription.
asked October 2026AristaRemove All Nodes With Duplicate Values From a Sorted Linked List
3/5A coding question on linked lists: from a sorted chain of nodes, remove every value that appears more than once, keeping no copy of it at all. The tricky cases are when the head itself must go and when nothing remains, and it tests careful pointer handling without extra storage.
asked October 2026CodingLinked ListTwo PointersRemove all occurrences of a target value from a linked list
2/5This Arista Networks interview question evaluates your ability to manipulate pointer structures by purging specific elements from a sequential chain. Candidates must carefully handle edge cases such as dropping the starting node while traversing the structure efficiently. Unlocking the comprehensive problem description and optimal model solution requires a subscription.
asked July 2026AristaLinked ListTwo PointerMissing Number (Not Starting From 0, Binary Search Variant)
3/5Identifying an absent element in a sorted sequence that does not originate at zero is a frequent algorithmic interview question at Arista Networks. This problem challenges you to progress from standard linear scans to an optimized logarithmic search strategy by exploiting the ordered nature of the input array. You will need to carefully analyze index offsets to pinpoint the broken continuity. Unlock the comprehensive problem description and optimal model solution with a subscription.
asked July 2026AristaPalindrome String Check (Handle Empty and Null)
2/5This Arista Networks interview question evaluates your ability to determine whether a given text sequence reads identically in both directions. The exercise tests string manipulation fundamentals, focusing heavily on robust edge case management such as unpopulated or missing parameters without crashing. Candidates must carefully analyze computational efficiency in terms of execution time and memory consumption. Access to the complete problem breakdown and verified solution requires a subscription.
asked July 2026AristaGenerate Matrix B
3/5Practice matrix manipulation techniques with this Arista Networks interview question. You are required to transform a two-dimensional grid of numbers into a new matrix where every position accumulates the running sum of preceding entries up to that index. This task evaluates your nested iteration skills and accumulator logic in matrix transformations. Unlock the complete problem context, test cases, and model solution by becoming a subscriber.
asked July 2026AristaGenerate Matrix B (2D Prefix Sum)
2/5This matrix transformation puzzle, commonly asked by Arista Networks, challenges developers to compute a two-dimensional prefix sum grid from a given input array. Each cell in the resulting structure must contain the cumulative sum of all preceding elements within the top-left rectangular region. Solving this efficiently demands a strong grasp of dynamic programming and matrix manipulation techniques to optimize computational overhead. Explore the full problem specifications and optimal solution by subscribing.
MatrixPrefix SumDynamic ProgrammingFind Missing Number in a Sorted Array (or None)
3/5In this Arista Networks interview question, applicants are challenged to discover a missing element in a sequentially ordered collection of unique values in logarithmic time. The assessment tests the ability to adapt binary search strategies to detect sequence anomalies efficiently without scanning every element. Access to the full problem statement and optimized implementation requires a subscription.
Binary SearchArrayMissing Number (Variant Not Starting From 0, Binary Search)
3/5Reported during Arista Networks hiring loops, this variation of a classic interview puzzle asks you to pinpoint a missing integer within a strictly sorted sequence that begins at an arbitrary starting value instead of zero. The challenge tests your analytical skills in comparing straightforward linear scans against logarithmic approaches using binary search to optimize execution speed. You will need to reason about boundary conditions and array indices effectively. Explore the full problem details and expert code walkthrough with a subscription.
Binary SearchArrayMath
Arista Networks coding interview FAQ
- What coding questions does Arista Networks ask?
- 9 reported coding questions, most often on Arista, Linked List, Binary Search, Array, Coding.
- How hard is the Arista Networks coding interview?
- The reported coding questions average 2.7 out of 5: 3 at 2/5, 6 at 3/5.
- Are these Arista Networks coding questions recent?
- The most recent report is from October 2026, and 6 were reported within the last twelve months. Dates come from the interview reports themselves.