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Stack overflow Interview Questions

<p>stack overflow is the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. more than 50 million professional and aspiring programmers visit stack overflow each month to help solve coding problems, develop new skills, and find job opportunities. founded in 2008, stack overflow partners with businesses to help them understand, hire, engage, and enable the world's developers. to learn more about stack overflow's business solutions - technical recruiting, advertising, market research, and enterprise knowledge sharing visit stackoverflowbusiness.com.</p>

stack overflow is the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. more than 50 million professional and aspiring programmers visit stack overflow each month to help solve coding problems, develop new skills, and find job opportunities. founded in 2008, stack overflow partners with businesses to help them understand, hire, engage, and enable the world's developers. to learn more about stack overflow's business solutions - technical recruiting, advertising, market research, and enterprise knowledge sharing visit stackoverflowbusiness.com.

Overview

Stack overflow Interview Guides

<p>You work at Stack Overflow on the community team that monitors the health of the platform.</p>

<p>Community members can create a post to ask a question, and other users can reply with answers or comments to that question. The community can express their support for the post by upvoting or downvoting.</p>

<p><strong>Example:</strong></p>

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

<p><code>post_analytics</code> table</p>

<table>
<thead>
<tr>
<th>Column</th>
<th align="center">Type</th>
<th align="center">Description</th>
</tr>
</thead>

<tbody>
<tr>
<td><code>id</code></td>
<td align="center">INTEGER</td>
<td align="center">Primary key of posts table</td>
</tr>

<tr>
<td><code>user_id</code></td>
<td align="center">INTEGER</td>
<td align="center">ID of the user who created the post</td>
</tr>

<tr>
<td><code>created_at</code></td>
<td align="center">DATETIME</td>
<td align="center">Timestamp of the post</td>
</tr>

<tr>
<td><code>title</code></td>
<td align="center">VARCHAR</td>
<td align="center">Title of the post</td>
</tr>

<tr>
<td><code>body</code></td>
<td align="center">VARCHAR</td>
<td align="center">Text content of the post</td>
</tr>

<tr>
<td><code>comment_count</code></td>
<td align="center">INTEGER</td>
<td align="center">Total number of the comments on a post</td>
</tr>

<tr>
<td><code>view_count</code></td>
<td align="center">INTEGER</td>
<td align="center">Total number of the views on a post</td>
</tr>

<tr>
<td><code>answer_count</code></td>
<td align="center">INTEGER</td>
<td align="center">Total number of answers on a post</td>
</tr>

<tr>
<td><code>upvotes</code></td>
<td align="center">INTEGER</td>
<td align="center">Total number of upvotes on the post</td>
</tr>
</tbody>
</table>

<ol>
<li><p>Given a table of Stack Overflow posts data, suggest three metrics to monitor the health of the community.</p></li>

<li><p>Write the queries for these metrics in SQL.</p></li>
</ol>


Create and write queries for health metrics for stack overflow 

Community Health Metrics

<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>In an A/B test, how can you check if assignment to the various buckets was truly random?</p>


<p>In an A/B test, which of the following is a common method to determine if the assignment to the test groups was truly random?</p>

In an A/B test, which of the following is a common method to determine if the assignment to the test groups was truly random?

Random Bucketing

Stack overflow Salaries by Position

<p><b>Data Engineer, Platform Engineering at Stack Overflow (Remote)</b></p><h3>Minimum Qualifications</h3><ul><li>5+ years experience building and optimizing big data pipelines, architectures, and data sets.</li><li>5+ years working SQL knowledge and experience with relational databases, query authoring (SQL), and familiarity with various database platforms.</li><li>Experience building processes supporting data transformation, data structures, metadata, dependencies, and workload management.</li><li>A track record of leading and mentoring less experienced developers.</li><li>Eager to teach others and invested in the growth of your team.</li><li>Self-motivating, self-directing, and a great communicator (written and oral).</li><li>Thrives in an environment that grants autonomy to explore creative solutions.</li><li>Excellent problem-solving skills.</li><li>Experience with Microsoft technologies and Azure cloud services for building and operating data pipelines.</li><li>Experience working remotely and/or with geographically distributed teams.</li><li>Experience with Agile methodologies such as Scrum, XP, or Kanban.</li><li>An active Stack Overflow profile, open source code, or example projects that demonstrate your passion for building great software.</li><li>Knowledge of how Stack Overflow works from our blog, podcasts, and other public artifacts.</li></ul><h3>Responsibilities</h3><ul><li>Optimize flow and collection of all product and business data, enabling data at scale for Stack Overflow.</li><li>Ensure that our data delivery architecture is optimized and consistent, enabling software engineers, database architects, data analysts, and data scientists to do their best work.</li><li>Create and maintain optimal data pipeline architecture to extract, transform, and load data from a variety of data sources using SQL and Azure big data technologies.</li><li>Assemble large, complex data sets that meet functional and non-functional business requirements.</li><li>Identify, design, and implement internal process improvements.</li><li>Keep our data separated and secure across national boundaries through multiple data centers and Azure regions.</li><li>Create data tools for analytics and data science team members that assist them in building and optimizing our product.</li></ul><h3>Compensation and Benefits</h3><ul><li>Competitive Base Salary</li><li>20 days paid vacation</li><li>Generous parental leave (16 weeks at 100% pay), family care leave, and paid sick days</li><li>Stock options</li><li>Completely free health insurance (no copay, no premiums)</li><li>401K match</li><li>Gym membership reimbursement</li><li>Home office setup reimbursement up to $2,000 if not located in one of our offices</li><li>Salary range: $100K - $150K</li></ul><h3>Company Information</h3><p>Stack Overflow's public platform serves 100 million people every month, making it one of the 50 most popular websites in the world. Founded in 2008, Stack Overflow’s public platform is used by nearly everyone who codes to learn, share their knowledge, collaborate, and build their careers. Our products and tools help developers and technologists in life and at work. These products include Stack Overflow for Teams, Stack Overflow Advertising, and Stack Overflow for Talent. Stack Overflow for Teams, our core SaaS collaboration product, is helping thousands of companies around the world make the transition to remote work, address business continuity challenges, and undergo digital transformation. Whether it’s on Stack Overflow or within Stack Overflow for Teams, community is at the center of all that we do.</p>
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Stack overflow Interview Questions

Overview

Stack overflow Interview Guides

Stack overflow Interview Questions

Stack overflow Salaries by Position

Stack overflow Opening Jobs