Arista Networks Softwaretest Engineer Interview Questions and Answers

DATA STRUCTURES,JAVA,COMPUTER NETWORKS

Generally Focus on networking part

DSA and basic python program if you have basic knowledge you can get into next Round easily

Q1. Basic hr questions
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Reasoning, English grammar, logical

Q1. Networking, python coding
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Q2. Based on resume they are asked basically networking
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Q1. Asking about Cisco, strength
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Round duration - 60 Minutes
Round difficulty - Medium

Timing: Morning
How was the environment? It happened in the Computer Lab of my institution
All students were assigned a computer and we had to solve questions on hackerrank

Q1. 
Order of People Heights Problem Statement
Consider 'N' individuals numbered from 0 to N-1 standing in a queue. You are provided with two arrays: Height and Infront, each consisting of 'N' non-negative int...read more
Ans. 
The task is to find the actual order of people in a queue based on their heights and the number of taller people in front of them.
• Iterate through the given arrays and create a list of tuples containing the height and number of taller people for each person.

• Sort the list of tuples in descending order of height and ascending order of the number of taller people.

• Create an empty result list and insert each tuple into the r...read more
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Round duration - 60 Minutes
Round difficulty - Medium

Round was a mix of concepts from OOPS, OS and Problem Solving

Q1. 
Binary Search Tree Value Finder
Given a Binary Search Tree (BST) and a key value 'X', determine if there exists a node within the BST containing the value 'X'.
Example:
Input:
Consider the tree represe...read more
Ans. 
The task is to find if a given value is present in a Binary Search Tree (BST).
• Start from the root node and compare the value with the target value.

• If the value matches, return true.

• If the target value is less than the current node value, move to the left child.

• If the target value is greater than the current node value, move to the right child.

• Repeat the process until a match is found or a leaf node is reached.

• If a leaf...read more
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Round duration - 60 Minutes
Round difficulty - Easy

It was in the morning. Because of covid test was from home. We had 50 MCQ and 1 coding question. The coding question was pretty easy. MCQ were mixed, we even had questions from machine learning.

Q1. 
Maximum Path Sum Between Two Leaves
Given a non-empty binary tree where each node has a non-negative integer value, determine the maximum possible sum of the path between any two leaves of the given tree.
...read more
Ans. 
Find the maximum path sum between two leaf nodes in a binary tree.
• Traverse the tree to find the maximum path sum between two leaf nodes

• Consider both cases where the path passes through the root and where it doesn't

• Keep track of the maximum sum while traversing the tree
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Round duration - 60 minutes
Round difficulty - Medium

Interview round. Questions were based on projects, database and one coding question

Q1. 
Longest Subarray Zero Sum Problem Statement
Given an array of integers arr, determine the length of the longest contiguous subarray that sums to zero.
Input:
N (an integer, the length of the array)
arr (...read more
Ans. 
Find the length of the longest contiguous subarray that sums to zero in an array of integers.
• Use a hashmap to store the cumulative sum and its corresponding index.

• Iterate through the array, updating the sum and checking if the current sum exists in the hashmap.

• If the sum exists in the hashmap, update the maximum length of subarray with sum zero.

• Return the maximum length of subarray with sum zero.
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Round duration - 40 minutes
Round difficulty - Easy

Managerial round. Was asked questions on projects and management

Round duration - 10 minutes
Round difficulty - Easy

HR just asked about basic stuffs and all. Nothing technical

Round duration - 60 Minutes
Round difficulty - Easy

This was the initial round consisting of some aptitude questions,technical multiple choice questions and one coding question.
The Multiple Choice Questions were pretty straight forward.

Q1. 
Snake and Ladder Problem Statement
Given a 'Snake and Ladder' board with N rows and N columns, where positions are numbered from 1 to (N*N) starting from the bottom left, alternating direction each row, f...read more
Ans. 
Find the minimum number of dice throws required to reach the last cell on a 'Snake and Ladder' board.
• Start from the bottom left cell and move according to dice outcomes (1-6).

• Utilize snakes and ladders to reach the last cell faster.

• Keep track of the minimum number of throws required to reach the last cell.

• If unreachable, return -1 as output.
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Round duration - 45 Minutes
Round difficulty - Medium

I had two interviewers in this round.Some Problem solving questions were asked in this round.

Q1. 
Anagram Pairs Verification Problem
Your task is to determine if two given strings are anagrams of each other. Two strings are considered anagrams if you can rearrange the letters of one string to form the...read more
Ans. 
Check if two strings are anagrams of each other by comparing their sorted characters.
• Sort the characters of both strings and compare them.

• Use a dictionary to count the frequency of characters in each string and compare the dictionaries.

• Ensure both strings have the same length before proceeding with comparison.

• Example: For input 'spar' and 'rasp', after sorting both strings, they become 'aprs' which are equal, so return...read more
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Q2. Can you explain all the main Object Oriented Programming concepts?
Ans. 
Object Oriented Programming concepts include encapsulation, inheritance, polymorphism, and abstraction.
• Encapsulation: Bundling data and methods that operate on the data into a single unit (class). Example: Class Car with properties like color and methods like drive().

• Inheritance: Creating new classes based on existing classes, inheriting their attributes and methods. Example: Class SUV inheriting from class Car.

• Polymor...read more
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Q3. Can you explain one of your projects?
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Round duration - 45 Minutes
Round difficulty - Easy

Number Of Interviewers : 2
I was asked two problem solving questions and I was asked to explain my projects.