About arista networks
Company Description
Arista Networks is a leading provider of software-driven cloud networking solutions for large data center and high-frequency trading environments. Founded in 2004, the company is renowned for its innovative approach to networking, focusing on high performance, scalability, and reliability. Arista's products, including its widely adopted CloudVision platform, empower organizations to automate and manage their networks with unprecedented ease. The company fosters a collaborative and inclusive work culture that emphasizes teamwork, continuous learning, and a commitment to excellence. Employees at Arista are encouraged to think creatively and push the boundaries of technology, making it an ideal environment for ambitious professionals who thrive on innovation and growth.
Software Engineer Interview Questions
Q1: What is your experience with network programming and protocols?
I have extensive experience with network programming, primarily using Python and C++. I have worked with various protocols, including TCP/IP, HTTP, and UDP, and have developed applications that interact with these protocols to optimize network performance.
Q2: Can you describe a challenging technical problem you faced and how you resolved it?
In a previous project, I encountered a significant bottleneck in the data flow of our application. I conducted a thorough analysis, identified the root cause as inefficient data handling, and implemented a new caching strategy that improved throughput by 50%.
Q3: How do you ensure the quality of your code?
I follow best practices such as writing unit tests and conducting code reviews with peers. Additionally, I utilize continuous integration tools to automate testing and ensure that any new code complies with our quality standards.
Q4: What is your experience with version control systems?
I have used Git extensively for version control, managing branching and merging strategies in collaborative environments. I am familiar with tools like GitHub and GitLab for repository hosting and collaboration.
Q5: How do you stay updated on the latest technologies in networking?
I regularly read industry publications, participate in online forums, and attend conferences and webinars focused on networking technologies. Continuous learning is essential in this fast-paced field.
Network Engineer Interview Questions
Q1: What experience do you have with network design and architecture?
I have worked on several projects where I was responsible for designing and implementing network architectures for enterprise environments. This includes creating diagrams, selecting hardware, and ensuring redundancy and scalability.
Q2: How do you troubleshoot network issues?
My troubleshooting process involves systematic diagnostics. I first gather information on the issue, check connectivity, analyze logs, and use tools like Wireshark to capture and analyze packets. This helps me pinpoint the problem effectively.
Q3: Can you explain the concept of VLANs and their benefits?
VLANs (Virtual Local Area Networks) allow for the segmentation of a physical network into multiple logical networks. This enhances security by isolating traffic and improves performance by reducing broadcast domains.
Q4: Describe your experience with routing protocols.
I have hands-on experience with various routing protocols, including OSPF, BGP, and EIGRP. I have configured and optimized these protocols to ensure efficient data routing across complex networks.
Q5: How do you approach network security?
I emphasize a layered security approach, implementing firewalls, intrusion detection systems, and regular security audits. I also ensure that all devices are updated with the latest patches to mitigate vulnerabilities.
DevOps Engineer Interview Questions
Q1: What is your experience with CI/CD pipelines?
I have designed and implemented CI/CD pipelines using tools like Jenkins and GitLab CI. This has allowed teams to automate testing and deployment processes, reducing time to market and improving software quality.
Q2: How do you manage configuration in a DevOps environment?
I use configuration management tools such as Ansible and Terraform to automate the provisioning and management of servers. This ensures consistency and reduces the likelihood of configuration drift.
Q3: Can you explain containerization and its advantages?
Containerization involves packaging applications and their dependencies into containers, allowing for consistency across environments. Advantages include portability, scalability, and efficient resource utilization.
Q4: How do you monitor and log application performance?
I use monitoring tools like Prometheus and Grafana to track application performance metrics. For logging, I utilize ELK stack (Elasticsearch, Logstash, and Kibana) to aggregate and analyze log data for troubleshooting.
Q5: What strategies do you employ for incident response?
My incident response strategy includes defining clear escalation paths, maintaining an updated runbook, and conducting post-incident reviews to identify root causes and improve processes for future incidents.
Sales Engineer Interview Questions
Q1: How do you approach understanding a client's network needs?
I begin by conducting thorough discussions with the client to understand their current infrastructure, challenges, and goals. This allows me to tailor our solutions to meet their specific requirements.
Q2: Can you explain a complex technical concept to a non-technical audience?
I utilize analogies and simplified language to break down complex concepts. For example, I might compare network architecture to a city’s road system, where routers act as traffic lights directing data flow.
Q3: What experience do you have with product demonstrations?
I have delivered numerous product demonstrations, showcasing our solutions' features and benefits. I focus on how our products address specific client pain points and provide value to their operations.
Q4: How do you handle objections from potential clients?
I listen carefully to the client's concerns, validate their feelings, and provide informed responses. I aim to address objections with relevant data and case studies that demonstrate our product's effectiveness.
Q5: Describe your experience with CRM tools.
I have utilized CRM tools like Salesforce to manage client relationships and track sales activities. This has helped me stay organized and maintain follow-ups, ultimately improving my sales effectiveness.
arista networks Interview Questions and Answers
Updated 21 Feb 2026Systems Engineer Interview Experience
Candidate: Emily Zhang
Experience Level: Senior
Applied Via: Recruiter Contact
Difficulty: Hard
Final Result: Rejected
Interview Process
4
Questions Asked
- Design a scalable system architecture for a cloud service.
- Explain your experience with Linux system administration.
- How do you ensure system security and compliance?
- Describe a time you led a critical incident response.
Advice
Be prepared for deep technical questions and leadership experience discussions.
Full Experience
The interview process was intense, including a technical deep dive, system design, and leadership behavioral interviews. The interviewers were thorough and expected strong technical expertise and communication skills.
Technical Support Engineer Interview Experience
Candidate: David Kim
Experience Level: Entry-level
Applied Via: Job Fair
Difficulty: Easy
Final Result:
Interview Process
2
Questions Asked
- How do you handle difficult customers?
- Explain a time you solved a technical problem under pressure.
Advice
Show strong communication skills and a customer-first attitude.
Full Experience
The first round was a phone screening focusing on communication and problem-solving skills. The second round was a video interview with situational questions. The process was straightforward and friendly.
Product Manager Interview Experience
Candidate: Cynthia Gomez
Experience Level: Mid-level
Applied Via: Referral
Difficulty:
Final Result:
Interview Process
3
Questions Asked
- How do you prioritize features in a product roadmap?
- Describe a challenging stakeholder management experience.
- Explain how you use data to make product decisions.
Advice
Prepare to discuss your product management philosophy and provide concrete examples of your impact.
Full Experience
The interview included a case study presentation and behavioral questions. The team was interested in my approach to cross-functional collaboration and data-driven decision making.
Network Engineer Interview Experience
Candidate: Brian Lee
Experience Level: Senior
Applied Via: Company Website
Difficulty: Hard
Final Result: Rejected
Interview Process
4
Questions Asked
- Explain BGP route selection process.
- How do you troubleshoot network latency issues?
- Describe your experience with network automation tools.
- What is your approach to designing scalable networks?
Advice
Gain deeper knowledge of routing protocols and automation scripting; practical experience is key.
Full Experience
The interview process was rigorous with multiple technical rounds including scenario-based questions and a hands-on lab exercise. The interviewers expected detailed and precise answers, reflecting real-world challenges.
Software Engineer Interview Experience
Candidate: Alice Johnson
Experience Level: Mid-level
Applied Via: LinkedIn
Difficulty:
Final Result:
Interview Process
3
Questions Asked
- Explain the difference between TCP and UDP.
- Write a function to reverse a linked list.
- Describe a time you optimized code for performance.
Advice
Brush up on data structures and algorithms, and be ready to discuss past projects in detail.
Full Experience
The process started with an online coding test, followed by a technical phone interview focusing on algorithms and system design. The final round was onsite with behavioral questions and coding exercises. The interviewers were friendly and focused on problem-solving skills.
Frequently Asked Questions in arista networks
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Common Interview Questions in arista networks
Q: In a sports contest there were m medals awarded on n successive days (n > 1). 1. On the first day 1 medal and 1/7 of the remaining m - 1 medals were awarded. 2. On the second day 2 medals and 1/7 of the now remaining medals was awarded; and so on.On the nth and last day, the remaining n medals were awarded.How many days did the contest last, and how many medals were awarded altogether?
Q: A hare and a tortoise have a race along a circle of 100 yards diameter. The tortoise goes in one directionand the hare in the other. The hare starts after the tortoise has covered 1/5 of its distance and that too leisurely.The hare and tortoise meet when the hare has covered only 1/8 of the distance. By what factor should the hareincrease its speed so as to tie the race?
Q: Suppose a newly-born pair of rabbits, one male, one female, are put in a field. Rabbits are able to mate at the age of one month so that at the end of its second month a female can produce another pair of rabbits. Suppose that our rabbits never die and that the female always produces one new pair (one male, one female) every month from the second month on.
Q: A rich man died. In his will, he has divided his gold coins among his 5 sons, 5 daughters and a manager. According to his will: First give one coin to manager. 1/5th of the remaining to the elder son.Now give one coin to the manager and 1/5th of the remaining to second son and so on..... After giving coins to 5th son, divided the remaining coins among five daughters equally.All should get full coins. Find the minimum number of coins he has?
Q: Consider a pile of Diamonds on a table. A thief enters and steals 1/2 of the total quantity and then again 2 extra from the remaining. After some time a second thief enters and steals 1/2 of the remaining+2. Then 3rd thief enters and steals 1/2 of the remaining+2. Then 4th thief enters and steals 1/2 of the remaining+2. When the 5th one enters he finds 1 diamond on the table. Find out the total no. of diamonds originally on the table before the 1st thief entered.
Q: There are two balls touching each other circumferencically. The radius of the big ball is 4 times the diameter of the small all. The outer small ball rotates in anticlockwise direction circumferencically over the bigger one at the rate of 16 rev/sec. The bigger wheel also rotates anticlockwise at N rev/sec. What is 'N' for the horizontal line from the centre of small wheel always is horizontal.
Q: There are 3 clans in an island - The Arcs who never lie, the Dons who always lie and the Slons who lie alternately with the truth. Once a tourist meets 2 guides who stress that the other is a Slon. They proceed on a tour and see a sports meet. The first guide says that the prizes have been won in the order Don, Arc, Slon. The other says that, the order is Slon, Don, Arc. (the order need not be exact). To which clan did each of the guides and the players belong? ...
Q: The citizens of planet nigiet are 8 fingered and have thus developed their decimal system in base 8. A certain street in nigiet contains 1000 (in base 8) buildings numbered 1 to 1000. How many 3s are used in numbering these buildings?
Q: ABCDE are sisters. Each of them gives 4 gifts and each receives 4 gifts No two sisters give the same combination ( e.g. if A gives 4 gifts to B then no other sisters can give four to other one.)Â (i) B gives four to A.(ii) C gives 3 to E. How much did A,B,C,E give to D?
Q: The egg vendor calls on his first customer and sells half his eggs and half an egg. To the second customer, he sells half of what he had left and half an egg and to the third customer he sells half of what he had then left and half an egg. By the way he did not break any eggs. In the end three eggs were remaining . How many total eggs he was having ?
Q: Every day a cyclist meets a train at a particular crossing .The road is straight before the crossing and both are travelling in the same direction.Cyclist travels with a speed of 10 kmph.One day the cyclist come late by 25 minutes and meets the train 5 km before the crossing.What is the speed of the train?
Q: A long, long time ago, two Egyptian camel drivers were fighting for the hand of the daughter of the sheik of Abbudzjabbu. The sheik, who liked neither of these men to become the future husband of his daughter, came up with a clever plan: a race would dete
Q: Tom has three boxes with fruits in his barn: one box with apples, one box with pears, and one box with both apples and pears. The boxes have labels that describe the contents, but none of these labels is on the right box. How can Tom, by taking only one p
Q: If I walk with 30 miles/hr i reach 1 hour before and if i walk with 20 miles/hr i reach 1 hour late. Find the distance between 2 points and the exact time of reaching destination is 11 am then find the speed with which it walks.
Q: There are four dogs/ants/people at four corners of a square of unit distance. At the same instant all of them start running with unit speed towards the person on their clockwise direction and will always run towards that target. How long does it take for them to meet and where?
Q: Consider a series in which 8 teams are participating. each team plays twice with all other teams. 4 of them will go to the semi final. How many matches should a team win, so that it will ensure that it will go to semi finals.?
Q: A Man is sitting in the last coach of train could not find a seat, so he starts walking to the front coach ,he walks for 5 min and reaches front coach. Not finding a seat he walks back to last coach and when he reaches there,train had completed 5 miles. what is the speed of the train ?
Q: A man driving the car at twice the speed of auto one day he was driven car for 10 min. and car is failed. he left the car and took auto to go to the office .he spent 30 min. in the auto. what will be the time take by car to go office?
Q: A person meets a train at a railway station coming daily at a particular time. One day he is late by 25 minutes, and he meets the train 5 k.m. before the station. If his speed is 12 kmph, what is the speed of the train.
Q: Motorboat A leaves shore P as B leaves Q; they move across the lake at a constant speed. They meet first time 600 yards from P. Each returns from the opposite shore without halting, and they meet 200 yards from. How long is the lake?
