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<p>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.</p>

<p>Write a query to randomly sample a row from this table.</p>

<p><strong>Input:</strong></p>

<p><code>big_table</code> table</p>

<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

<p>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.</p>

<p>How would you assess the validity of the result?</p>


Experiment Validity

<p>You are testing hundreds of hypotheses with many <em>t</em>-tests. What considerations should be made?</p>


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

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?

Blue river technology Salaries by Position

<h3>Job Description</h3><div>Job Description<div><p><strong>Job Responsibilities</strong></p><ul><li>Develop Computer Vision (CV), Machine-Learning (ML), and Deep-Learning (DL) models using images and other sensor data to detect and recognize objects.</li><li>Conduct research on state-of-the-art methods to improve and optimize the performance of CV, ML, and DL algorithms and models to meet high product quality and real-time compute requirements using large-scale server-class machines.</li><li>Develop models and algorithms for accurately localizing objects in real-world environments using geometric computer vision and depth perception techniques.</li><li>Use cloud service providers like Amazon Web Services (AWS) and various database management systems to develop tools and pipelines for large-scale data processing and analysis to improve product<br />performance.</li></ul><p><strong>Qualifications</strong></p><ul><li>Master's degree in Computer Science, Information Science, Robotic Systems, or related field.</li><li>2 years of related experience.</li><li>Required skills: <ul><li>Develop Computer Vision (CV), Machine-Learning (ML), and Deep-Learning (DL) models using images and other sensor data to detect and recognize objects (2 years)</li><li>Conduct research on state-of-the-art methods to improve and optimize the performance of CV, ML, and DL algorithms and models to meet high product quality and real-time compute requirements using large-scale server class machines (2 years)</li><li>Develop models and algorithms for accurately localizing objects in real-world environments using geometric computer vision and depth perception techniques (any amount of experience acceptable)</li><li>Use cloud service providers like Amazon Web Services (AWS) and various database management systems to develop tools and pipelines for large-scale data processing and analysis to improve product performance (2 years).</li></ul></li><li> 5% domestic travel; may work remotely; periodic time in the office required; must live within commuting distance of the office. </li></ul><p>Full time. $159,182 - $275,000/year. Please visit <span class="long-word">https://bluerivertechnology.com/join</span>-us/ to apply. </p><p>#LI-DNI</p></div></div>

Blue river technology Interview Questions

Blue river technology Interview Guides

Blue river technology Interview Questions

Blue river technology Salaries by Position

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