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Arista Networks Interview Questions

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Let’s say that your company is running a standard control and variant AB test on a feature to increase conversion rates on the landing page. The PM checks the results and finds a .04 p-value.

How would you assess the validity of the result?

Experiment Validity

Let’s say we have a table with an <code>id</code> and <code>name</code> fields. The table holds over 100 million rows and we want to sample a random row in the table without throttling the database.

Write a query to randomly sample a row from this table.

Input:

<code>big_table</code> table

<table>
<thead>
<tr>
<th>Columns</th>
<th>Type</th>
</tr>
</thead>

<tbody>
<tr>
<td><code>id</code></td>
<td>INTEGER</td>
</tr>

<tr>
<td><code>name</code></td>
<td>VARCHAR</td>
</tr>
</tbody>
</table>

Write a query to randomly sample a row from a big table.

Random SQL Sample

Let’s say you work for a social media company that has just done a launch in a new city. Looking at weekly metrics, you see a slow decrease in the average number of comments per user from January to March in this city.

The company has been consistently growing new users in the city from January to March.

What are some reasons why the average number of comments per user would be decreasing and what metrics would you look into?

What metric could be used to measure if active users are still engaging on the platform despite an overall decrease in the average number of comments per user?

What metric could be used to measure if active users are still engaging on the platform despite an overall decrease in the average number of comments per user?

Decreasing Comments

How would you investigate a decline in the average number of comments per user?

Arista Networks Salaries by Position

Arista Networks is an industry leader in data-driven, client-to-cloud networking for large data center, campus and routing environments. Arista is a well-established and profitable company with over $5 billion in revenue. Arista’s award-winning platforms, ranging in Ethernet speeds up to 800G bits per second, redefine scalability, agility, and resilience. Arista is a founding member of the Ultra Ethernet consortium. We have shipped over 20 million cloud networking ports worldwide with CloudVision and EOS, an advanced network operating system. Arista is committed to open standards, and its products are available worldwide directly and through partners.At Arista, we value the diversity of thought and perspectives each employee brings. We believe fostering an inclusive environment where individuals from various backgrounds and experiences feel welcome is essential for driving creativity and innovation.Our commitment to excellence has earned us several prestigious awards, such as the Great Place to Work Survey for Best Engineering Team and Best Company for Diversity, Compensation, and Work-Life Balance. At Arista, we take pride in our track record of success and strive to maintain the highest quality and performance standards in everything we do. QualificationsAs a software engineer at Arista, you own your project end to end. You and your project team will work with product management and customers to define the requirements and design the architecture. You’ll build the backend, write automated tests, and get it deployed into production via our CD pipeline. As a senior member of the team you’ll also be expected to help mentor and grow new team members. This role demands a strong and broad software engineering background, and you won’t be limited to any single aspect of the product or development process.<ul><li>BS/MS degree in Computer Science and 5+ years of relevant experience.</li><li>Strong knowledge of one or more of programming languages (Go, Java, Python)</li><li>Experience developing distributed systems or scale out applications for a SaaS environment</li><li>Experience developing scalable backend systems in Go is a plus</li><li>Experience with network monitoring, network protocols, machine learning or data analytics is a plus</li></ul>Additional InformationWe are looking for only experienced (5+ years of development experience) candidates at the moment.

Arista Networks Interview Questions

Arista Networks Interview Guides

Arista Networks Interview Questions

Arista Networks Salaries by Position

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