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Arista Networks System Test Engineer Interview Questions and Answers

Updated 6 Apr 2025

Arista Networks System Test Engineer Interview Experiences

2 interviews found

Interview experience
5
Excellent
Difficulty level
Hard
Process Duration
Less than 2 weeks
Result
Selected Selected

I appeared for an interview in Mar 2025, where I was asked the following questions.

  • Q1. Explain the in detail about the project worked in your previous company??
  • Q2. Explain the packet format of frame, ARP, IP, OSPF, BGP, MPLS

Interview Preparation Tips

Interview preparation tips for other job seekers - Cover everything, Interview questions will be micro managed

I applied via Naukri.com and was interviewed in Jun 2021. There were 5 interview rounds.

Interview Questionnaire 

2 Questions

  • Q1. First they will ask basic end to end packet forwarding mechanism across different subnet.
  • Q2. They will mostly ask in which area you are more comfortable like L2 or L3 , according to your choice they will pick any protocol and they will start asking questions related to it.Like Ospf, bgp in routing...

Interview Preparation Tips

Interview preparation tips for other job seekers - Prepare well for basic networking fundamentals and prepare atleast 2-3 protocol in detail, and be comfortable with the concepts which you did mention in your CV.

System Test Engineer Interview Questions Asked at Other Companies

Q1. Adas levels and explain the details. -5 levels (level 0 to level ... read more
asked in Infosys
Q2. What is difference between Java and Python?
Q3. 2. What acknowledgments used in project?
asked in Qualcomm
Q4. Blick diagram of digital communication and source coding
asked in Infosys
Q5. Tell me about OOPS concepts.

Interview questions from similar companies

I applied via Naukri.com and was interviewed before Dec 2020. There were 3 interview rounds.

Interview Questionnaire 

3 Questions

  • Q1. What is OOPs concept?
  • Ans. 

    OOPs concept stands for Object-Oriented Programming concepts which includes encapsulation, inheritance, polymorphism, and abstraction.

    • Encapsulation is the process of hiding the implementation details from the user.

    • Inheritance allows a class to inherit properties and methods from another class.

    • Polymorphism allows objects to take on multiple forms or behaviors.

    • Abstraction is the process of hiding unnecessary details from

  • Answered by AI
  • Q2. What is lazy loading?
  • Ans. 

    Lazy loading is a technique used to defer the loading of non-critical resources until they are needed.

    • It improves page load time and performance.

    • It is commonly used for images, videos, and other media files.

    • It can be implemented using JavaScript libraries like LazyLoad or Intersection Observer API.

    • Lazy loading can also be used for modules and components in web applications.

    • It helps to reduce the initial load time of th

  • Answered by AI
  • Q3. What is eager loading?
  • Ans. 

    Eager loading is a technique used in software development to load related data in advance to avoid multiple database queries.

    • Eager loading is used to optimize database queries and improve performance.

    • It loads all the required data in a single query instead of making multiple queries.

    • It is commonly used in Object-Relational Mapping (ORM) frameworks like Hibernate, Entity Framework, etc.

    • Eager loading can be used with var...

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Clearing Test is the key

Skills evaluated in this interview

I appeared for an interview before May 2021.

Round 1 - Coding Test 

(1 Question)

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.

    ...
  • 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

  • Answered by AI
Round 2 - Face to Face 

(1 Question)

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 (...
  • 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.

  • Answered by AI
Round 3 - Telephonic Call 

Round duration - 40 minutes
Round difficulty - Easy

Managerial round. Was asked questions on projects and management

Round 4 - HR 

Round duration - 10 minutes
Round difficulty - Easy

HR just asked about basic stuffs and all. Nothing technical

Interview Preparation Tips

Professional and academic backgroundI applied for the job as SDE - 1 in BangaloreEligibility criteriaAbove 7 CGOACisco interview preparation:Topics to prepare for the interview - Data structures, Computer Networking, DBMS, College projects, C++Time required to prepare for the interview - 4 monthsInterview preparation tips for other job seekers

Tip 1 : Practice leetcode questions
Tip 2 : Be very well aware of the projects
Tip 3 : Stay calm

Application resume tips for other job seekers

Tip 1 : Don't use fancy colour
Tip 2 : Write more about stuffs which you are confident like projects or any tech

Final outcome of the interviewSelected

Skills evaluated in this interview

Interview Questionnaire 

3 Questions

  • Q1. Why do you want to join this company?
  • Ans. 

    I am excited to join this company because of its reputation for innovation and commitment to employee growth.

    • I am impressed by the company's track record of developing cutting-edge software solutions.

    • I appreciate the emphasis on professional development and growth opportunities for employees.

    • I am excited about the prospect of working with a talented and dedicated team.

    • I believe that this company's values align with my ...

  • Answered by AI
  • Q2. Who is your role model?
  • Ans. 

    My role model is Elon Musk.

    • I admire his innovative thinking and determination to push boundaries.

    • His ability to lead multiple successful companies is inspiring.

    • His focus on sustainable energy and space exploration aligns with my values.

    • I strive to emulate his work ethic and passion for making a positive impact on the world.

  • Answered by AI
  • Q3. What extra-curricular activities have you been involved in?
  • Ans. 

    I have been involved in various extra-curricular activities such as volunteering, sports, and music.

    • Volunteered at local animal shelter

    • Played on intramural basketball team

    • Participated in school choir

    • Attended coding workshops and hackathons

  • Answered by AI

Interview Preparation Tips

Round: Resume Shortlist
Experience: I consulted my seniors for preparation of my resume. I believe that seniors provide the best possible insights in this regards. I had a standard resume for all the companies.

Round: Test
Experience: I had prepared for the CAT examination which helped me in these written tests. The first round was the written test. The criterion for the written test was to have a CGPA more than 6.0. There was an aptitude test and a technical test. The technical test consisted of programming questions based on C++ and data structures. From data structures they asked a lot questions based on tree traversals and from C++. A large number of questions from pointers and arrays were also asked.
The aptitude test was slightly easier than the CAT examination standards. Majority of the questions were related to data interpretation and some were of based on logical reasoning. The total duration of the both the tests combined was 90 minutes.

Around 50 people appeared for the first round and nearly 13 got shortlisted for the next round.
Tips: For the written tests, particularly the aptitude section, if would really help if you have prepared for the CAT examination. There is a book written by an author named R.S. Agarwal which would prove to be beneficial from the point of view of these written tests.
Duration: 90 minutes

Round: Group Discussion
Experience: I did not prepare much for the GD’s. However I did keep myself abreast with certain latest happenings.There were no group activities conducted in the recruitment process of Century Link.

Round: HR Interview
Experience: For HR interviews I prepared answers to some frequently asked HR questions. I found these questions on the internet. Generally the questions asked in the interviews are related to the profile on offer; for instance in A2Z interview I was asked a lot of questions from power systems since it was a core company and in Century Links I was asked questions from C++ and data structures since they had come to recruit for a software engineering profile.

Round: Technical Interview
Experience: In this interview I was questioned on my C++ and data structure knowledge. They asked me questions on pointers and further asked me to explain the concept of dangling pointers. They did not want me to write down the complete code with proper syntax's of the problems asked to me. They only asked me to write the algorithms of the various problems.
They also asked me some puzzles. Unfortunately, I was not able to solve any of them. During the course of the interview they asked me to specify the reason for my keen interest in joining an IT company.
At the end of first interview some candidates were shortlisted and called for the second round of interview.

Round: Technical Interview
Experience: The second interview was conducted by a senior company official. He enquired about my project and again, like in the first interview, asked me to state the reason for my interest in joining an IT company.This interview round was an elimination round.

Round: HR Interview
Experience: The interview was an HR interview. Candidates who reached till this interview were all selected; basically this interview was like a formality to check the candidate’s fit with the company.

College Name: IIT ROORKEE
Motivation: I had never heard of the company before the recruitment season. I attended the PPT organised by the company, I found the company to be a well reputed/established company and thus applied to it. The profile was open for Electrical, Computer Science, Mechanical and Electronics engineering students.

I appeared for an interview before Jan 2016.

Interview Questionnaire 

7 Questions

  • Q1. Give a brief description about your education, past job profile and other questions.
  • Q2. Why did you quit your last organization after just 2.5 years?
  • Ans. 

    Seeking new challenges and growth opportunities.

    • I felt that I had reached a plateau in my role and was no longer being challenged.

    • I was interested in exploring new technologies and wanted to work on more innovative projects.

    • I wanted to work in a more collaborative and dynamic environment.

    • I left on good terms and have maintained positive relationships with my former colleagues.

    • I am excited to bring my skills and experie...

  • Answered by AI
  • Q3. Why do you want to join Centurylink?
  • Ans. 

    I am excited to join Centurylink because of their reputation for innovation and commitment to customer satisfaction.

    • Centurylink has a strong focus on developing cutting-edge technology solutions

    • The company values customer feedback and strives to provide excellent service

    • I am impressed by Centurylink's dedication to diversity and inclusion in the workplace

  • Answered by AI
  • Q4. Why did you relocate to Noida?
  • Ans. 

    Relocated to Noida for better career opportunities and growth.

    • Noida is a hub for IT companies and offers a lot of job opportunities in the software development field.

    • The city has a good work-life balance and a lower cost of living compared to other metropolitan cities.

    • I was also attracted to the diverse culture and the opportunity to work with people from different backgrounds.

    • I did my research and found that Noida has...

  • Answered by AI
  • Q5. Are you ok to work in US shift?
  • Ans. 

    Yes, I am comfortable working in US shift.

    • I have prior experience working in US shift.

    • I am flexible with my work timings.

    • I understand the importance of meeting project deadlines.

    • I am willing to adjust my personal schedule to accommodate work requirements.

  • Answered by AI
  • Q6. Where do you put up?
  • Ans. 

    I currently reside in New York City.

    • I live in an apartment in Manhattan.

    • My neighborhood is known for its diverse food options.

    • I have easy access to public transportation.

    • I enjoy exploring the city in my free time.

  • Answered by AI
  • Q7. Solve 12 Mainframe Puzzles

Interview Preparation Tips

Round: Technical + HR Interview
Experience: I told them all about the previous companies and my past job profile as a Mainframe Developer.
I gave a valid reason for quitting the previous company.
I cited that the reason to relocate to Noida was my wedding.
I was not okay to work in shifts, hence I denied.
I was putting up in Noida itself back then.

Round: Puzzle Interview
Experience: I was given a list of 12 Mainframe puzzles with questions from Cobol, DB2 and JCL.

I could solve 8 of them correctly.
Tips: Prepare puzzles as they give just 1 minute per question and not more.

Interview Preparation Tips

General Tips: It was challenging for me to get into this company. I was rejected around 10-11 times before i got placed in this company. So finding out the reason and to overcome it in the next company was the challenging task.
For getting into this company you should have the knowledge of OS, Database,Networks and OOP concepts. "Job profile was software developer.
The questions asked to me were related to OS concepts like deadlocks process and threads n all. From networks they asked me about the wifi drivers installed in your system. They asked about dynamic programming and they gave me one question to solve using dynamic programming. Then they asked me to write two more codes . From database they asked me about the errors which we will get if we do these things in the table. They asked me about the hashmap and how does it work and why it takes constant time in data retrieval. They asked me about the OOPs concepts and the virtual class implementation in detail. In short they asked me questions from every field."
Skill Tips: For the interviews karumanchi is the best book.
Presentation skills matters alot. No matter how much u know, presenating your knowledge in front of the interviewer matters alot. Speaking very fast during an interview may lead you to rejections (personal experience).
Skills:
College Name: NIT Surathkal

Interview Preparation Tips

Round: Resume Shortlist
Tips: It will be good to have a GPA of 8 and above

Round: Test
Experience: Questions were easy it were good at C and basic maths. Questions were distributed on all aspects of computer science such as Operating Systems, Few Output Question, Data Structures and Application layer networking . In basic aptitude most questions fall under Probability, distance and time and few others.
Duration: 60 minutes
Total Questions: 50

Skills: Communication, Basic Coding, Math Puzzle
College Name: NIT Surathkal

Interview Preparation Tips

Round: Test
Experience: The test was MCQ type. It comprised of questions from Operating Systems, Data Structures, Microprocessors, logical Reasoning, Aptitude and Computer Networks. No negative marking was there.
Tips: One needs to be fast as you can't spend much time on one question.
Duration: 60 minutes
Total Questions: 50

Round: Technical Interview
Experience: I was given 2 coding questions to solve and basics of oops, operating systems, data structures and networks were asked. 3-4 questions were asked in each topic mentions above. The interviewer also asked 2 puzzles which were the standard ones. He first asked me if I knew the topic or not, then only he asked me questions about it. But that doesn't mean that you can skip all the above mentions topics.
Tips: Be relaxed and confident and try to discuss your approach with the interviewer.

Round: Technical Interview
Experience: 2 Coding questions and 3-4 questions from operating systems and networks.Questions also from the mentioned projects.

Round: HR Interview
Experience: Standard HR interview with questions like what Cisco does and why they should hire you. He also asked me questions from the CV.

Tips: Be confident and mug up your cv well

Round: HR Interview
Experience: It was just a formality where he just asked about my background and whether I would be able to move to bangalore and Why I want to join Cisco.

Skills: Confidence, Problem Solving Skills, Operating System Basics, Coding Skills, Object Oriented Programming (OOP) Basics, Computer Networking, Data Strrutures
College Name: IIT Guwahati

I applied via Referral

Interview Questionnaire 

10 Questions

  • Q1. Program to print the elements of a binary tree in spiral order
  • Ans. 

    Program to print binary tree elements in spiral order

    • Use two stacks to keep track of nodes at odd and even levels

    • Push nodes from left to right in odd level stack and right to left in even level stack

    • Pop nodes from the stack alternatively and print them

    • Repeat until both stacks are empty

  • Answered by AI
  • Q2. Explain what happens underneath when you enter a URL in the browser
  • Ans. 

    Entering a URL in the browser triggers a series of events to retrieve and display the requested webpage.

    • The browser checks the cache for a previously stored copy of the webpage

    • If not found, the browser sends a request to the DNS server to resolve the domain name to an IP address

    • The browser then sends a request to the web server at the IP address for the webpage

    • The web server responds with the requested webpage

    • The brows...

  • Answered by AI
  • Q3. Explain why MAC addresses are required despite having IP addresses
  • Ans. 

    MAC addresses are required for identifying devices on a local network, while IP addresses are used for identifying devices on a global network.

    • MAC addresses are used for communication within a local network

    • IP addresses are used for communication across different networks

    • MAC addresses are assigned by the manufacturer and cannot be changed

    • IP addresses can be assigned dynamically or statically

    • MAC addresses are used in the...

  • Answered by AI
  • Q4. Solve the classical bridge and torch puzzle
  • Q5. Explain my internship project
  • Ans. 

    Developed a web application for tracking inventory and sales data

    • Used React.js for front-end development

    • Implemented RESTful APIs using Node.js and Express for back-end

    • Utilized MongoDB for database management

    • Integrated authentication and authorization features for secure access

    • Designed user-friendly interface with responsive design

  • Answered by AI
  • Q6. What is an arraylist in Java?
  • Ans. 

    An ArrayList is a dynamic array in Java that can grow or shrink in size during runtime.

    • ArrayList is a class in Java's Collection framework.

    • It implements the List interface and allows duplicate elements.

    • Elements can be added or removed using methods like add(), remove(), etc.

    • It can also be sorted using the sort() method.

    • Example: ArrayList names = new ArrayList<>();

    • names.add("John"); names.add("Mary"); names.remove(0);

Answered by AI
  • Q7. What is the difference between an arraylist and a linkedlist in Java?
  • Ans. 

    ArrayList is a resizable array while LinkedList is a doubly linked list.

    • ArrayList is faster for accessing elements while LinkedList is faster for adding or removing elements.

    • ArrayList uses contiguous memory while LinkedList uses non-contiguous memory.

    • ArrayList is better for random access while LinkedList is better for sequential access.

    • Example: ArrayList - List names = new ArrayList<>(); LinkedList - List names = new L

  • Answered by AI
  • Q8. “Java is not a pure OO language”. Justify (the answer expected was that the primitive types are not objects in Java!)
  • Ans. 

    Java is not a pure OO language due to primitive types not being objects.

    • Primitive types like int, boolean, etc. are not objects in Java

    • They do not have methods or inheritance like objects do

    • This violates the principle of everything being an object in pure OO languages

    • Wrapper classes like Integer, Boolean, etc. were introduced to provide object-like behavior for primitives

  • Answered by AI
  • Q9. What is the difference between an object oriented and object based language?
  • Ans. 

    Object-oriented languages support inheritance and polymorphism, while object-based languages do not.

    • Object-oriented languages allow for the creation of classes and objects, and support inheritance and polymorphism.

    • Object-based languages only support objects, but do not have the concept of classes or inheritance.

    • Examples of object-oriented languages include Java, C++, and Python, while JavaScript is an example of an obj

  • Answered by AI
  • Q10. Explain inheritance and abstraction with a concrete example
  • Ans. 

    Inheritance is a way to create new classes based on existing ones. Abstraction is a way to hide implementation details.

    • Inheritance allows a subclass to inherit properties and methods from a superclass.

    • Abstraction allows a class to provide a simplified interface to its users while hiding its implementation details.

    • For example, a Car class can inherit properties and methods from a Vehicle class, while also implementing i...

  • Answered by AI

    Interview Preparation Tips

    Skills:
    College Name: NA

    Skills evaluated in this interview

    Arista Networks Interview FAQs

    How to prepare for Arista Networks System Test Engineer interview?
    Go through your CV in detail and study all the technologies mentioned in your CV. Prepare at least two technologies or languages in depth if you are appearing for a technical interview at Arista Networks. The most common topics and skills that interviewers at Arista Networks expect are Manual Testing, System Testing, Aaa, Arp and Automation Testing.
    What are the top questions asked in Arista Networks System Test Engineer interview?

    Some of the top questions asked at the Arista Networks System Test Engineer interview -

    1. They will mostly ask in which area you are more comfortable like L2 or L3 , acc...read more
    2. First they will ask basic end to end packet forwarding mechanism across differe...read more

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    Arista Networks System Test Engineer Interview Process

    based on 1 interview

    Interview experience

    5
      
    Excellent
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