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Pvm Interview Questions

A/B Testing

Algorithms

Analytics

Machine Learning

Probability

Product Metrics

Python

Statistics

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Suppose there exists a new airline named Jetco that flies domestically across North America. Jetco recently had a study commissioned that tested the boarding time of every airline, and it came out that Jetco had the fastest average boarding times of any airline.

What factors could have biased this result, and what would you look into?

What could potentially bias the average boarding time in favor of an airline that only flies domestically?

What could potentially bias the average boarding time in favor of an airline that only flies domestically?

Boarding Times Bias

A new airline came out as the fastest average boarding times compared to other airlines.  What factors could have biased this result and what would you look into?

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?

The schema below is for a retail online shopping company consisting of two tables, <code>attribution</code> and <code>user_sessions</code>.

<ul>
<li>The attribution table logs a session visit for each row.</li>

<li>If <code>conversion</code> is <code>true</code>, then the user converted to buying on that session.</li>

<li>The <code>channel</code> column represents which advertising platform the user was attributed to for that specific session.</li>

<li>Lastly the <code>user_sessions</code> table maps many to one session visits back to one user.</li>
</ul>

First touch attribution is defined as the channel with which the converted user was associated when they first discovered the website.

Calculate the first touch attribution for each <code>user_id</code> that converted. 

Example:

Input:

<code>attribution</code> table

<table>
<thead>
<tr>
<th>Column</th>
<th>Type</th>
</tr>
</thead>

<tbody>
<tr>
<td><code>session_id</code></td>
<td>INTEGER</td>
</tr>

<tr>
<td><code>channel</code></td>
<td>VARCHAR</td>
</tr>

<tr>
<td><code>conversion</code></td>
<td>BOOLEAN</td>
</tr>
</tbody>
</table>
<code>user_sessions</code> table

<table>
<thead>
<tr>
<th>column</th>
<th>type</th>
</tr>
</thead>

<tbody>
<tr>
<td><code>session_id</code></td>
<td>INTEGER</td>
</tr>

<tr>
<td><code>created_at</code></td>
<td>DATETIME</td>
</tr>

<tr>
<td><code>user_id</code></td>
<td>INTEGER</td>
</tr>
</tbody>
</table>
Example output:

<table>
<thead>
<tr>
<th><code>user_id</code></th>
<th><code>channel</code></th>
</tr>
</thead>

<tbody>
<tr>
<td>123</td>
<td>facebook</td>
</tr>

<tr>
<td>145</td>
<td>google</td>
</tr>

<tr>
<td>153</td>
<td>facebook</td>
</tr>

<tr>
<td>172</td>
<td>organic</td>
</tr>

<tr>
<td>173</td>
<td>email</td>
</tr>
</tbody>
</table>

First Touch Attribution

<h3>Job Description</h3><div>Job Description<div>Forward Deployed Software EngineerTampa/St. Pete (FL), San Diego (CA), Richmond (VA), Rock Island Arsenal (IL), and Huntsville (AL)PVM, Inc. is seeking a highly skilled and adaptable Forward Deployed Software Engineer (FDSE) to join our team. In this role, you will work directly with customers to understand their most pressing challenges and develop innovative, data-driven solutions. Our customers rely on PVM's expertise and cutting-edge technology to support critical operations, whether addressing operational inefficiencies, enhancing security, or optimizing decision-making processes.As an FDSE at PVM, you will take ownership of complex projects, collaborating closely with engineers, analysts, and stakeholders to build and deploy impactful solutions. Your responsibilities will range from designing scalable architectures and wrangling large datasets to developing custom applications and interfacing directly with customers to refine their workflows. Whether solving real-world problems in national security, public health, or enterprise operations, your work will drive meaningful change.This role is ideal for problem solvers who thrive in fast-paced environments, enjoy tackling ambiguous challenges, and are eager to bridge the gap between technology and mission success. At PVM, you'll gain hands-on experience with a wide range of technologies, continuously develop your skills, and work alongside a team that values innovation, autonomy, and collaboration.Responsibilities<ul><li>Work directly with customers to understand their most pressing challenges and develop innovative, data-driven solutions.</li><li>Collaborate with engineers, analysts, and stakeholders to build and deploy impactful software solutions.</li><li>Design scalable architectures and manage large datasets to support customer needs.</li><li>Develop custom applications tailored to customer workflows and operational needs.</li><li>Interface directly with customers to refine their workflows and optimize their processes.</li><li>Contribute to solving complex, real-world problems across industries such as national security, public health, and enterprise operations.</li><li>Bridge the gap between technology and mission success by applying problem-solving skills to ambiguous challenges.</li><li>Take ownership of high-stakes projects, working autonomously to drive solutions and make impactful decisions.</li><li>Continuously develop your technical skills by working with a wide range of technologies and collaborating with a highly skilled team.</li><li>Foster innovation, autonomy, and collaboration in a fast-paced, dynamic work environment.</li></ul>Requirements<ul><li>Active US Security clearance or eligibility and willingness to obtain a US Security clearance. </li><li>Palantir Foundry and Gotham experience is highly desired</li><li>Military/Special Operation/Law Enforcement experience.</li></ul>Tools<ul><li>Strong engineering background, preferred in fields such as Computer Science, Mathematics, Software Engineering, Physics, and Data Science.</li><li>A highly analytical mindset and eagerness to solve technical problems with data structures, storage systems, cloud infrastructure, front-end frameworks, and other technical tools.</li><li>Experience or interest in working with and using large scale data to solve valuable business problems.</li><li>Strong coder with demonstrated proficiency in programming languages such as Python, Java, C++, TypeScript/JavaScript, or similar.</li><li>Experience with programming, scripting or statistical packages (e.g. Python, R, Matlab, SQL) is a plus.</li></ul>Skills<ul><li>Strong communication skills with the ability to break down, explain, and demonstrate complex concepts in an easy-to-understand manner</li><li>Extraordinary ability to take on open-ended problems in unstructured environments.</li><li>Demonstrated ability to collaborate effectively in teams of technical and non-technical individuals, and comfortable working in a rapidly changing environment with dynamic objectives and iteration with users.</li><li>Ability to continuously learn, work independently, and make decisions with minimal supervision.</li><li>Adaptive and introspective; willing to learn, teach, lead and follow.</li><li>Ability to travel domestically 25% of the time if needed</li><li>Ability to work independently and as part of a team.</li></ul>Why PVM?At PVM, we mean it when we say we value diversity. As a PVM team member, you will work with people from all different backgrounds that are passionate about the problems we solve for our customers and are focused on delivering value for our clients. Our culture encourages problem solving, leadership, and innovation, and creates an environment that will support your professional and personal growth. Here are a few highlights of the advantages of being a part of the PVM community:<ul><li>Opportunities for growth and advancement</li><li>Tuition/Training reimbursement</li><li>Peer bonus program</li><li>Remote and on-site positions available</li><li>Unlimited PTO</li><li>Flexible work schedule</li></ul>PVM delivers digital services that help government agencies unlock the power of their data for good and maximize the value of their technology investments. We design, develop, and deploy solutions to solve mission-critical problems. PVM is a black- and service-disabled veteran-owned small business and was founded by a retired Naval officer out of frustration with the status quo with one goal in mind: to help his fellow Shipmates solve the problems they were facing every day. Today, we continue to be driven by that same goal, and are focused on taking on our clients' missions as our own to make a difference in the communities we serve.PVM believes in equal opportunity employment. We won't discriminate against any employee or applicant based on race, gender, nationality, age, religion, disability, military status, or sexual orientation. As a company and as individuals, we're committed to providing an inclusive and welcoming environment for our team, our family members, and our clients.</div></div>

<h3>Job Description</h3><div>Job Description<div>Senior Software EngineerTampa/St. Pete (FL), San Diego (CA), Richmond (VA), Rock Island Arsenal (IL), and Huntsville (AL)PVM, Inc. is actively seeking a skilled Senior Software Engineer to join our dedicated justice team. In this role, you will design, develop, and support technical solutions while applying a variety of best practices. You will have the opportunity to tackle technical challenges, work on complex enterprise applications, and develop solutions that have a direct and meaningful impact on law enforcement operations. By joining PVM's justice team, you'll contribute to the advancement of innovative technologies that drive efficiency and effectiveness in critical justice programs, shaping a more secure and just society.Responsibilities:<ul><li>Provide Palantir Foundry development and support for all aspects of programming, report writing, designing, documenting, and testing</li><li>Provide technical application support for deployed cloud-based applications</li><li>Diagnose and resolve technical issues in highly interconnected and integrated enterprise applications</li><li>Derive technical requirements from statements of capability need</li><li>Manage and communicate requirements throughout the software development lifecycle, including requirements prioritization, requirements changes, and</li><li>conflict resolution.</li><li>Develop, test, and deploy enhancements to developed products and systems while working with key customers, other team members, and management.</li><li>Building products that aim to make technical concepts and applications accessible for non-technical users</li><li>Create low-and no-code tools that enable application builders to build products for their users leveraging Palantir Foundry native applications</li><li>Participate in common Agile and Scrum SDLC practices. Estimation Sessions, Sprint Planning, Sprint Reviews, PR reviews, etc.</li><li>Provide support to other PVM Teams and Initiatives: Surge support, RFX proposal response writing, white papers, company goals and obtaining technical</li><li>Effectively train users on products developed</li><li>Be able to communicate clearly with both the team and the client</li></ul>Requirements:<ul><li>7+ years of object-oriented software development experience in Python/PySpark,Typescript, Javascript, HTML/CSS. R preferred but not required.</li><li>This position may potentially require a government clearance up to TS/SCI for future efforts</li><li>Minimum Security+ certification</li><li>Knowledge of and/or hands-on experience with Palantir Technologies SaaS Platforms (highly preferred), other exposure to Enterprise Data Analytics Platforms such as Alteryx, Informatica, Tableau, etc.</li><li>Strong understanding and application of fundamental object-oriented design principles</li><li>Knowledge and experience in ETL, data pipelines, transformations, data science/predictive analytics.</li><li>Ability to ideate and develop solutions from concept to completion</li></ul>Education:<ul><li>BS/BA or equivalent experience</li></ul>Tools:<ul><li>Palantir Foundry- Knowledge and experience of Palantir services (highly preferred)</li><li>Alteryx, Informatica, Tableau or other data analysis tools.</li><li>Data/ML Pipelines using S3, Athena, Glue, Airflow, Kinesis or Kafka, and Sagemaker</li><li>Serverless Apps using S3, Lambda, Step Functions, API Gateway, AppSync, and Cognito</li><li>Experience/understanding of Infrastructure as Code, Cloud Native, AWS, and Serverless</li><li>High technical standards demonstrated using design patterns, clean coding, peer reviews, and unit testing</li><li>Experience with AWS GovCloud, DoD Risk Management Framework (RMF) is a plus</li></ul>Skills:<ul><li>Proactive</li><li>Strong written and verbal communication skills</li><li>Self-starter</li><li>Process driven and project management skills</li><li>Demonstrated superior organizational skills</li><li>Exemplary communication and time management skills</li></ul>Why PVM?At PVM, we mean it when we say we value diversity. As a PVM team member, you will work with people from all different backgrounds that are passionate about the problems we solve for our customers and are focused on delivering value for our clients. Our culture encourages problem solving, leadership, and innovation, and creates an environment that will support your professional and personal growth. Here are a few highlights of the advantages of being a part of the PVM community:<ul><li>Opportunities for growth and advancement</li><li>Tuition/Training reimbursement</li><li>Peer bonus program</li><li>Remote and on-site positions available</li><li>Unlimited PTO</li><li>Flexible work schedule</li></ul>PVM delivers digital services that help government agencies unlock the power of their data for good and maximize the value of their technology investments. We design, develop, and deploy solutions to solve mission-critical problems. PVM is a black- and service-disabled veteran-owned small business and was founded by a retired Naval officer out of frustration with the status quo with one goal in mind: to help his fellow Shipmates solve the problems they were facing every day. Today, we continue to be driven by that same goal, and are focused on taking on our clients' missions as our own to make a difference in the communities we serve.PVM believes in equal opportunity employment. We won't discriminate against any employee or applicant based on race, gender, nationality, age, religion, disability, military status, or sexual orientation. As a company and as individuals, we're committed to providing an inclusive and welcoming environment for our team, our family members, and our clients.</div></div>

<h3>Job Description</h3><div>Job Description<div>Software Engineering SkillBridge Fellowship OpportunityLocation: Remote or Hybrid (varies by location) Duration: Up to 180 days (aligned with DoD SkillBridge guidelines)Welcome to PVM—where opportunity meets impact.Are you a transitioning service member participating in the Department of Defense (DoD) SkillBridge program? At PVM, we recognize the skills, discipline, and dedication you bring—and we're excited to help you take the next step in your journey.We are proud to offer a Software Engineering Fellowship designed specifically for SkillBridge participants who are ready to explore civilian tech careers. This fellowship provides hands-on experience, professional mentorship, and opportunities to apply your technical background (or build one) within a mission-driven environment.About PVMPVM is a purpose-driven technology company committed to solving complex problems through data, software, and innovation. We support government and commercial partners across health, defense, justice, and more. Our mission is clear: use technology to make a positive impact.What You'll Do as a Software Engineering FellowDuring your fellowship, you'll work alongside experienced engineers, product managers, and analysts to learn, contribute, and grow. You'll gain exposure to projects in areas like:<ul><li>Data engineering and analysis</li><li>Cloud-native applications and DevSecOps</li><li>Low-code/no-code platforms like Palantir Foundry</li><li>Agile team collaboration and modern development workflows</li></ul>Fellows will be given a structured training path, with the opportunity to work on internal tools, prototypes, or real-world client challenges depending on your experience and interests.Who You Are<ul><li>An active-duty service member eligible for the DoD SkillBridge program</li><li>Interested in software engineering, data, or technology careers</li><li>Motivated to learn, solve problems, and build high-impact solutions</li><li>A team player with strong communication and time management skills</li><li>Some experience with programming, software development, or data tools</li></ul>Why PVM?At PVM, we mean it when we say we value diversity. As a PVM team member, you will work with people from all different backgrounds that are passionate about the problems we solve for our customers and are focused on delivering value for our clients. Our culture encourages problem solving, leadership, and innovation, and creates an environment that will support your professional and personal growth. Here are a few highlights of the advantages of being a part of the PVM community:· Opportunities for growth and advancement· Tuition/Training reimbursement· Peer bonus program· Remote and on-site positions available· Unlimited PTO· Flexible work schedulePVM delivers digital services that help government agencies unlock the power of their data for good and maximize the value of their technology investments. We design, develop, and deploy solutions to solve mission-critical problems. PVM is a black- and service-disabled veteran-owned small business and was founded by a retired Naval officer out of frustration with the status quo with one goal in mind: to help his fellow Shipmates solve the problems they were facing every day. Today, we continue to be driven by that same goal, and are focused on taking on our clients' missions as our own to make a difference in the communities we serve.PVM believes in equal opportunity employment. We won't discriminate against any employee or applicant based on race, gender, nationality, age, religion, disability, military status, or sexual orientation. As a company and as individuals, we're committed to providing an inclusive and welcoming environment for our team, our family members, and our clients.Take the next step. Explore new horizons, grow your technical skills, and prepare for a meaningful post-military career. Join PVM's SkillBridge Fellowship and help us build the future—together.</div></div>

<h3>Job Description</h3><div>Job Description<div>Intermediate Software EngineerTampa/St. Pete (FL), San Diego (CA), Richmond (VA), Rock Island Arsenal (IL), and Huntsville (AL), Las Angeles, CAPVM, Inc. is actively seeking a skilled Intermediate Software Engineer to join our dedicated justice team. In this role, you will design, develop, and support technical solutions while applying a variety of best practices. You will have the opportunity to tackle technical challenges, work on complex enterprise applications, and develop solutions that have a direct and meaningful impact on law enforcement operations. By joining PVM's justice team, you'll contribute to the advancement of innovative technologies that drive efficiency and effectiveness in critical justice programs, shaping a more secure and just society.Responsibilities:<ul><li>Provide Palantir Foundry development and support for all aspects of programming, report writing, designing, documenting, and testing</li><li>Provide technical application support for deployed cloud-based applications</li><li>Diagnose and resolve technical issues in highly interconnected and integrated enterprise applications</li><li>Derive technical requirements from statements of capability need</li><li>Manage and communicate requirements throughout the software development lifecycle, including requirements prioritization, requirements changes, and</li><li>conflict resolution.</li><li>Develop, test, and deploy enhancements to developed products and systems while working with key customers, other team members, and management.</li><li>Building products that aim to make technical concepts and applications accessible for non-technical users</li><li>Create low-and no-code tools that enable application builders to build products for their users leveraging Palantir Foundry native applications</li><li>Participate in common Agile and Scrum SDLC practices. Estimation Sessions, Sprint Planning, Sprint Reviews, PR reviews, etc.</li><li>Provide support to other PVM Teams and Initiatives: Surge support, RFX proposal response writing, white papers, company goals and obtaining technical</li><li>Effectively train users on products developed</li><li>Be able to communicate clearly with both the team and the client</li></ul>Requirements:<ul><li>3+ years of object-oriented software development experience in Python/PySpark,Typescript, Javascript, HTML/CSS. R preferred but not required.</li><li>This position may potentially require a government clearance up to TS/SCI for future efforts</li><li>Minimum Security+ certification</li><li>Knowledge of and/or hands-on experience with Palantir Technologies SaaS Platforms (highly preferred), other exposure to Enterprise Data Analytics Platforms such as Alteryx, Informatica, Tableau, etc.</li><li>Strong understanding and application of fundamental object-oriented design principles</li><li>Knowledge and experience in ETL, data pipelines, transformations, data science/predictive analytics.</li><li>Ability to ideate and develop solutions from concept to completion</li></ul>Education:<ul><li>BS/BA or equivalent experience</li></ul>Tools:<ul><li>Palantir Foundry- Knowledge and experience of Palantir services (highly preferred)</li><li>Alteryx, Informatica, Tableau or other data analysis tools.</li><li>Data/ML Pipelines using S3, Athena, Glue, Airflow, Kinesis or Kafka, and Sagemaker</li><li>Serverless Apps using S3, Lambda, Step Functions, API Gateway, AppSync, and Cognito</li><li>Experience/understanding of Infrastructure as Code, Cloud Native, AWS, and Serverless</li><li>High technical standards demonstrated using design patterns, clean coding, peer reviews, and unit testing</li><li>Experience with AWS GovCloud, DoD Risk Management Framework (RMF) is a plus</li></ul>Skills:<ul><li>Proactive</li><li>Strong written and verbal communication skills</li><li>Self-starter</li><li>Process driven and project management skills</li><li>Demonstrated superior organizational skills</li><li>Exemplary communication and time management skills</li></ul>Why PVM?At PVM, we mean it when we say we value diversity. As a PVM team member, you will work with people from all different backgrounds that are passionate about the problems we solve for our customers and are focused on delivering value for our clients. Our culture encourages problem solving, leadership, and innovation, and creates an environment that will support your professional and personal growth. Here are a few highlights of the advantages of being a part of the PVM community:<ul><li>Opportunities for growth and advancement</li><li>Tuition/Training reimbursement</li><li>Peer bonus program</li><li>Remote and on-site positions available</li><li>Unlimited PTO</li><li>Flexible work schedule</li></ul>PVM delivers digital services that help government agencies unlock the power of their data for good and maximize the value of their technology investments. We design, develop, and deploy solutions to solve mission-critical problems. PVM is a black- and service-disabled veteran-owned small business and was founded by a retired Naval officer out of frustration with the status quo with one goal in mind: to help his fellow Shipmates solve the problems they were facing every day. Today, we continue to be driven by that same goal, and are focused on taking on our clients' missions as our own to make a difference in the communities we serve.PVM believes in equal opportunity employment. We won't discriminate against any employee or applicant based on race, gender, nationality, age, religion, disability, military status, or sexual orientation. As a company and as individuals, we're committed to providing an inclusive and welcoming environment for our team, our family members, and our clients.</div></div>

Question	Topic	Difficulty	Ask Chance
Boarding Times Bias	Statistics	Medium	Very High
Hundreds of Hypotheses	Statistics	Medium	Very High
First Touch Attribution	SQL	Hard	Very High

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