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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?

Cirrus logic Salaries by Position

For nearly four decades, Cirrus Logic has been propelled by the top engineers in mixed-signal processing. Our rockstar team thrives on solving complex challenges with innovative end-user solutions for the world's top consumer brands. Cirrus Logic is also known for an award-winning culture, which was built on a foundation of inclusion and fairness, meaningful community engagement and delivering enjoyable employee experiences at every turn. But we couldn't do it without our extraordinary workforce - and that's where you come in. Join our team and help us continue to make Cirrus Logic an exceptional place to grow your career! Cirrus Logic is looking for an experienced Windows driver engineer to join our team developing drivers that enable leading audio and haptics applications. The ideal candidate will be a proactive technical thought leader with excellent communication skills, an intrinsic drive toward pragmatic solutions, and a strong desire to expand their knowledge in the audio applications space. In this role, you will collaborate with a world-wide team to deliver robust, scalable, and reliable software that enables exciting new technologies that are reshaping today's PC user experience. Responsibilities <ul><ul><li>Design, build, and maintain efficient, reusable, and reliable Windows drivers software and documentation </li><li>Bring-up and debug new devices and platforms in Windows environments </li><li>Architect, develop, and integrate Windows drivers in a regulated product development process </li><li>Collaborate with other teams such as Design, Firmware, SQA, and Tools </li><li>Work closely with Applications and Field teams to support customer engagements </li><li>Perform defect tracking and peer code reviews </li></ul></ul> Required Skills and Qualifications <ul><ul><li>Bachelor's or Masters in CS/EE with 5+ years of Windows driver development </li><li>OS architecture knowledge including race conditions, synchronization, deadlocks, and interrupt management </li><li>Experience with Windows kernel software development in C and Visual Studio </li><li>Familiarity with serial buses and protocols (e.g., I2C, SPI, I2S, HDA, SoundWire) </li><li>Familiarity with version control systems like Git and SVN </li><li>Strong troubleshooting skills using software (automated tests, debuggers), hardware (logic analyzers, oscilloscopes, DMMs), and other resources (schematics and datasheets) </li><li>Excellent written and verbal interpersonal skills </li><li>Ability to work across functional groups and organizations </li></ul></ul> Preferred Skills and Qualifications <ul><ul><li>Expertise in Windows Driver Framework and/or Kernel Mode Driver Framework </li><li>Experience with PC architectures and chipsets </li><li>Development board and customer platform bring-up experience </li><li>SCM experience in a Gerrit based workflow </li><li>Experience with Continuous Integration Systems (Jenkins, SonarQube) and static analysis tools </li><li>C++, Python knowledge </li><li>Test-driven-development experience </li></ul></ul> #LI-KD1 #LI-Hybrid Diversity drives innovation at Cirrus Logic. Different approaches, ideas and points of view are both valued and respected, and employees are rewarded for their skills, experience and performance. Additionally, Cirrus Logic is an Equal Opportunity/Affirmative Action Employer, and we do not discriminate on the basis of race, color, national origin, pregnancy status, marital status, gender, age, religion, physical or mental disability, medical condition, veteran status, sexual orientation, gender identity, genetic information or any other characteristic protected by law.

Cirrus logic Interview Questions

Cirrus logic Interview Guides

Cirrus logic Interview Questions

Cirrus logic Salaries by Position

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