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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

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?

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

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Job Position: React UI Software EngineerLocation : Austin/TXDay 1 OnsiteExperience Level : 6-12 years FTE Only(USC, GC, H1 Transfers)Note: Candidate from Tier 1 company's only acceptable Top Skills: Hands on – JavaScript, Redux, React Js,UI Concept,UI Framework Design and implement Web-based application using React framework. React.JS, NodeJS, ReduxEvaluate, suggest, and outline improvements to existing interface flows.Build and maintain scalable web applications using custom, reusable, and responsive UI components.Work closely with design teams and business owners to define, design, and implement features.Basic Qualifications:Strong analytical and problem-solving skills.Proficient in ReactJS frameworks.Experience with RESTful APIs and optimizing front end performance.Experience working with source control systems such as Git.

Natsoft Interview Questions

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