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Spirent Communications 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

You are testing hundreds of hypotheses with many t-tests. What considerations should be made?

What is a key disadvantage of the F-test when compared to multiple t-tests?

What is a key disadvantage of the F-test when compared to multiple t-tests?

Hundreds of Hypotheses

You are testing hundreds of hypotheses with many t-tests. What considerations should be made?

Spirent Communications Salaries by Position

Job title: Senior Staff Software EngineerLocation: Bangalore About Spirent CommunicationsSpirent is the leading global provider of automated test and assurance solutions for communications networks, cybersecurity, and positioning. We provide innovative products, services, and managed solutions that address the test, assurance, and automation challenges of a new generation of technologies, including 5G, cloud, autonomous vehicles, and beyond. From testing in the lab to testing in the real world, Spirent helps companies deliver on their promise to their customers of a new generation of connected devices and technologies. Why Spirent?... Because together we can shape tomorrow!Spirent is its people. When you join the Spirent team, you will join forces and work alongside some of the industry’s most passionate subject matter experts. In an environment of innovation, you will find a place where you can grow, think, explore, create, and make change happen. At Spirent, we believe that diversity and inclusion are essential to thriving in the ever-changing world of global technology. We embrace a culture where difference is valued and openness, mutual respect, collaboration, and fairness are considered fundamental. Spirent does not tolerate discrimination or offensive behavior of any kind. We are committed to creating workplaces that genuinely reflect the diversity of the world we serve and an environment where everyone feels empowered to bring their full, authentic self to work. Your success is vital to our success, which is why we will support you to perform, grow, and contribute – with the confidence to be yourself. And to support your personal wellbeing, we hope you will love our dedication to creating the right work and life balance experience! Join Spirent and together let’s shape tomorrow! Responsibilities:<ul><li>A software architect or a Senior Technical Lead with strong experience in designing and developing high-end network packet processing (or traffic generating) applications. The applications could be focused on latest Technology trends Networking & Telecommunications through Layer-2 to Layer-7.</li><li>Strong experience in software design. Evaluate and propose alternate designs. Articulate the rationale behind selected designs to different stakeholders.</li><li>Strong exposure to multicore architecture, and System internals for Time Sensitive use-cases.</li><li>Define software performance measurement parameters.</li><li>Work with a team to define deliverables of a design. Lead the daily technical activities. </li><li>Define and work on high quality software devolvement practices like Unit-Tests, Code-Coverage, and Vulnerability tracking tools.</li><li>Interface with Engineering Management, Product Management and the team of Software Developers and Quality Assurance.</li><li>Work in an Agile/Waterfall development environment by collaborating effectively with coworkers within/across geographically separate teams.</li><li>Work on Customer Defects to triage, fix and test them in a highly demanding environment.</li><li>Guide/Mentor junior members in the team. Collaborate and drive technical communications with other Engineering teams, Support Teams or Customers as needed.</li></ul> Requirement:Candidate comes up with good industry experience in designing and developing networking Control plane / Data plane applications. Striving to design complex networking features in an energetic and dynamic software development environment.<ul><li>BS/Btech/MS/Mtech in Computer Science or equivalent from a reputed institution.</li><li>10+ years of software development experience. 4+ years of Software design experience.</li><li>Solid experience in System Software / Network Software / Time Sensitive Applications development from scratch. </li><li>Solid understanding of Linux System Internals, Data-Structures, Operating-Systems, and OOPS Concepts.</li><li>Expertise in C++ / C-Programming, Networking Protocols (Layer-2, 3, 4).</li><li>Good analytical, debugging, and troubleshooting skills.</li><li>Excellent communication, presentation skills.</li><li>Professional Certifications (CCNP / CCIE / Software Development Methodologies etc.).</li><li>Exposure to Python / TCL / C# / Golang – Added advantage.</li></ul>

Spirent Communications Interview Questions

Spirent Communications Interview Guides

Spirent Communications Interview Questions

Spirent Communications Salaries by Position

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