I applied through an employee referral. I interviewed at Arista Networks in Oct 2024
Interview
The interview was on coder pad + google meet, all in browser. For the live coding part, the problem was a medium array question, with a follow up to optimize space complexity. Some C basics and pointers were asked as well. Haven't heard back from them. The interviewer was very polite.
Interview questions [1]
Question 1
A medium array problem, with a follow up to optimize space complexity. Need to write test cases as well. Questions about C basics and pointers in the end.
It was average. They asked me to code 2 questions and perform a more efficient approach for both. However, for some reason, they rejected me 30 mins after the interview was done.
I applied through university. I interviewed at Arista Networks (Bengaluru) in Aug 2025
Interview
1. Data Structures (Tree Traversals)
Asked to explain and write the algorithms for Inorder, Preorder, and Postorder traversal of a binary tree.
Follow-up: difference between DFS and BFS traversals.
2. C/C++ Programming Concepts
Questions around:
Memory & Pointers → how pointers work, pointer arithmetic, dangling pointers.
Pass by value vs pass by reference in C/C++.
A question on JWT (JSON Web Token) – concept, usage in authentication, and security aspects.
3. Tree Coding Question
Problem: Check if a target value exists along any root-to-leaf path.
Required to construct the full binary tree and then write the function for path-sum/target check.
Expected to implement full code (not just pseudo code).
4. Bit Manipulation Problem
A logic-based coding problem using bitwise operators.
Example (not exact wording): Given a number, perform certain bit manipulations (like checking set bits, or toggling).
5. Next Greater Element (Variation)
Classic stack-based problem: find the next greater element for each element in an array.
Variation was asked (could be circular array or next greater frequency element).
Needed optimized solution (O(n) with stack).
Interview questions [1]
Question 1
Questions on pointers and memory (pointer arithmetic, dangling pointers).
Difference between pass by value and pass by reference, with code examples.
Some discussion around dynamic memory allocation and how it’s managed in C++.
Emphasis on understanding how things work at a low-level in memory, not just syntax.
The interview consists of one round, which includes solving a Leetcode Medium-level coding problem and a comprehensive review of your resume, covering projects, experience, and technical skills in detail. Full time roles can have more interviews
