I applied to Arista Networks through the Placement Cell of my institute and everyone who applied received the online test link.
Round 1(Coding and Aptitude – Duration: 60 Minutes): Platform: HackerRank
The format was as follows:-
| Section | No of Questions | Type | Duration |
|---|
| 1 | 15 | MCQ | 15 |
| 2 | 1 | Coding – Easy | 20 |
| 3 | 1 | Coding – Medium | 25 |
| Total | 17 | | 60 |
The MCQs were from core CSE subjects like Computer Networks, Database Management Systems, Operating Systems, Data Structures, and Algorithms.
The coding questions are as follows:-
- You are given two hammers type 1 and type 2. Along with hammers there are n wooden planks with varying strengths. The type 1 hammer can reduce the strength of any plank to 0 with a single blow whereas type 2 hammer can only reduce the strength by 1 with every hit. You can use type 1 hammer only k times. Find:-
- The minimum number of hits to break all the planks.
- Indexes of wooden planks that you would break using type 1 hammer arranged in descending order of their strengths.
- Number of hits by hammer type 2.
- https://snippets.cacher.io/snippet/e08f0fec1e61bf8f22a6
Round 2(Data Structures and Algorithms – Duration: 45 Minutes): Platform: Google Meet
This round was based on Data Structures and Algorithms. The interviewer asked me to open any online IDE I was comfortable with and share my screen.
The questions asked were as follows:-
- https://www.geeksforgeeks.org/decimal-equivalent-of-binary-linked-list/
- https://www.geeksforgeeks.org/design-a-stack-that-supports-getmin-in-o1-time-and-o1-extra-space/
The code was expected to compile and pass a few test cases given by the interview. She also corrected me wherever she felt the code was not fully optimized or there were redundant statements.
Round 3(System Design – Duration: 50 Minutes): Platform: Google Meet
We had a long discussion about the design of a URL shortener. It should have the following characteristics:-
- Creation of new shortened URLs for a given and URL from the user.
- Deletion of old URLs after a certain period of time.
- The system should work in multiprocessor environment where simultaneous read and write operations may occur.
We had an interesting discussion over a variety of aspects that involved concepts of Operating Systems, Data Structures, Advanced Data Structures and Algorithms.
At the end he asked a few basic questions related to C language about dynamic memory allocation and how to implement vector (C++ STL) in C.
Result: Placed