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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

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?

Digital Prospectors Salaries by Position

Position: Senior Software Engineer (Autonomous Vehicles)Location: Austin, TX (Hybrid 3 days onsite)Length: 6 monthsJob Description:Our client is seeking an experienced and innovative Senior Software Engineer to join a cutting-edge team focused on autonomous vehicle systems. The successful candidates will play a key role in developing and maintaining the software infrastructure that supports the verification and validation of software for automated trucks, contributing to the safety, motion control, communications, and cloud capabilities that power their next-generation systems.Essential Duties and Responsibilities (but not limited to):Design, develop, and maintain software that deploys and controls multiple HiL test benches.Participate in roadmap discussions to align software and hardware capabilities and plan software releases and deployments.Lead the execution of full software development lifecycle activities, including design, development, testing, and deployment, using C++ and Python in an Agile Linux environment.Mentor junior team members and provide guidance on best practices in software engineering.Work closely with hardware engineers and other stakeholders to understand requirements and develop software architecture that meets project goals.Lead troubleshooting efforts and provide solutions during design, prototype, and production phases, performing root cause analysis and resolving issues effectively.Assist in creating and maintaining comprehensive technical documentation for software components, architectures, and processes.Qualifications:Bachelors degree in Computer Science, Computer Engineering, Robotics Engineering, Mechanical Engineering, or a related technical field with 5+ years of relevant experience, OR a Masters degree with 4+ years of experience.Strong proficiency in C++ and Python programming.Experience in building and deploying Python wheels and utilizing Docker for self-contained solution deployment.Expertise in software architecture, design, and testing from scratch.Knowledge of Agile software development practices in a Linux-based environment.Proven ability to mentor and guide less experienced software developers.Strong interpersonal skills to work effectively with cross-functional teams and stakeholders.Proven experience in software engineering with a focus on robotics, automation, or embedded systems.POST-OFFER BACKGROUND CHECK IS REQUIRED. Digital Prospectors is an Equal Opportunity Employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, veteran status, or any other characteristic protected by law. Digital Prospectors affirms the right of all individuals to equal opportunity and prohibits any form of discrimination or harassment.Make this your next career move as one of our many long-term contractors or employees!Work as our full-time employee with full benefits (Medical, Dental, Vision, Life, STD, LTD, PTO, etc.) - OR - work as a W2 hourly contractor at a higher pay rate if you don't need the benefit package.Come see why DPC has achieved:4.9/5 Star Glassdoor rating and the only staffing company (Voted Best Staffing Firm to Temp/Contract For seven times by Staffing Industry Analysts as well as a Best Company to Work For by Forbes, Fortune and Inc. magazine.As you are applying, please join us in fostering diversity, equity, and inclusion by completing the Invitation to Self-Identify form today!www.LoveYourJob.com

**Software Engineer** **Lexington, MA** **Job Type:** Contract **Recruiter:** Bob Bunker (https://digitalprospectors.com/our-team/bob-bunker) **Phone:** 603-772-2700 **Position:** Software Engineer (C++) **Location:** Lexington, MA (Hybrid 3 days onsite) **Length:** 3+ years **Job Description:** Our client is seeking a talented and motivated Software Engineer to join their dynamic team dedicated to the development of advanced sensor control and signal processing systems. In this role, the Software Engineer will engage in the full lifecycle of application development, contributing to cutting-edge software primarily for radar control, with potential extensions to telemetry and optical systems. If you are passionate about object-oriented programming, thrive in collaborative environments, and are eager to tackle complex challenges, we invite you to apply today! **Essential Duties and Responsibilities (but not limited to):** + Conduct thorough software and code analysis, requirements analysis, and software reviews to ensure quality and reliability. + Utilize object-oriented methodologies to create modular and maintainable software architectures. + Develop simulations to model software behavior and validate designs. + Create intuitive graphical user interfaces that enhance user interaction with the software. + Implement rigorous testing protocols to ensure software meets high standards of quality and reliability. + Identify opportunities for performance improvement, usability enhancements, and automation of processes. + Support, maintain, and document software functionality to facilitate ongoing development and compliance with standards. + Integrate new software solutions with existing systems to ensure seamless operation and functionality. + Research and evaluate new technologies for implementation to keep our systems at the forefront of innovation. + Implement strategies to ensure software can be localized or globally adapted for various markets. **Qualifications:** + Bachelors degree in Computer Science, Computer Engineering, Electrical Engineering, Mathematics, Physics, or related scientific or engineering field. + In-depth knowledge of C++ object-oriented programming, with several years of experience applying this knowledge to complex software architectures. + Proven ability to quickly learn new technologies and programming languages and adapt to diverse environments and methodologies. + Familiarity with software development methodologies (i.e., spiral development), version control systems, and debugging tools. + Proficient in software development within a Linux and UNIX environment. + Experience with Java, C, Python, MATLAB, and shell scripting is preferred. + Familiarity with publish-subscribe middleware, parallel programming, and distributed systems is desired. + Knowledge of UNIX-like operating system architectures, network programming, and real-time programming is preferred. + Familiarity with x86-based computer architecture is preferred. + Basic understanding of UNIX system and network configuration and administration to aid in software development is strongly preferred. + Willingness to participate in field testing, which may involve travel to locations (i.e., Huntsville or Kwaj). + **Due to the nature of the work, an Interim clearance is required, however an active Secret clearance is highly preferred.** POST-OFFER BACKGROUND CHECK IS REQUIRED. Digital Prospectors is an Equal Opportunity Employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, veteran status, or any other characteristic protected by law. Digital Prospectors affirms the right of all individuals to equal opportunity and prohibits any form of discrimination or harassment. Make this your next career move as one of our many long-term contractors or employees! + Work as our full-time employee with full benefits (Medical, Dental, Vision, Life, STD, LTD, PTO, etc.) - OR - work as a W2 hourly contractor at a higher pay rate if you don't need the benefit package. Come see why DPC has achieved: + 4.9/5 Star Glassdoor rating and the only staffing company (< 1000 employees) to be voted in the national Top 10 Employees Choice - Best Places to Work by Glassdoor. + Voted Best Staffing Firm to Temp/Contract For six times by Staffing Industry Analysts as well as a Best Company to Work For by Forbes, Fortune and Inc. magazine. As you are applying, please join us in fostering diversity, equity, and inclusion by completing the Invitation toSelf-Identify (https://www.paycomonline.net/v4/ats/web.php/jobs/ViewJobDetails?job=78910&clientkey=55336DD43EED5DE3CE2A2212C8A1FA1B) form today! www.LoveYourJob.com

**Sr. Business Analyst** **Boston, MA** **Job Type:** Contract **Recruiter:** Holly Bajar (https://digitalprospectors.com/our-team/holly-bajar) **Phone:** 617.337.4251 **Position:** Senior Business Analyst **Location:** Boston, MA (Hybrid 3 days onsite) **Length:** 4-6 months **Job Description:** Our client seeks a driven and enthusiastic Senior Business Analyst to identify stakeholder needs, propose IT solutions, and present recommendations across all organizational levels. The role requires strong communication skills, the ability to build effective relationships, and a focus on innovation and customer satisfaction. The position involves significant cross-functional collaboration and teamwork. **Essential Duties and Responsibilities (but not limited to):** + Gather, analyze, validate, and document business, organizational, and/or operational requirements. + Gather, analyze, and document business and operational requirements. + Lead business analysis initiatives and assess technologys impact on business. + Develop a deep understanding of stakeholders and their needs. + Collaborate with internal customers and vendors to define system requirements and distinguish true needs. + Document and optimize business processes and recommend automation opportunities. + Support service delivery teams with system requirements, gap analysis, and alternative solutions. + Contribute to communications, change management, and development planning. + Create and manage documentation, contingency strategies, and resource plans. + Prepare and present materials to demonstrate solutions and facilitate stakeholder sign-off. + Support service delivery by reviewing design documents and ensuring requirements are met. + Review and support test strategies, plans, and user testing. + Develop test plans, scenarios, and end-user documentation. + Enhance business analysis and project management processes. + Provide support to the PSMO and assist in managing the ITS Project Pipeline. + Perform other assigned duties. **Qualifications:** + Bachelor's degree in Computer Science, Information Technology, Business Administration, or similar work experience. + 5-7 years of experience in IT disciplines, with exposure to digital technologies and requirements elicitation methods. + 4-7 years in business analysis for large IT projects, with experience in building relationships with stakeholders. + Proven track record in implementing major projects, processes, and systems. + Strong business analysis skills, including the ability to clarify needs and propose solutions. + Experience with requirements elicitation methods (i.e., design thinking, prototyping, focus groups). + Knowledge of IT applications, processes, software, hardware, and cloud solutions. + Self-motivated, with experience working in cross-functional teams and with third-party solutions. + Familiarity with agile and waterfall project methodologies. + Ability to manage multiple initiatives and deadlines. + Skilled in facilitating requirements sessions with varying levels of technical expertise, with strong verbal, written, and interpersonal skills. + Business Analysis certification is a significant asset. POST-OFFER BACKGROUND CHECK IS REQUIRED. Digital Prospectors is an Equal Opportunity Employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, veteran status, or any other characteristic protected by law. Digital Prospectors affirms the right of all individuals to equal opportunity and prohibits any form of discrimination or harassment. Make this your next career move as one of our many long-term contractors or employees! + Work as our full-time employee with full benefits (Medical, Dental, Vision, Life, STD, LTD, PTO, etc.) - OR - work as a W2 hourly contractor at a higher pay rate if you don't need the benefit package. Come see why DPC has achieved: + 4.9/5 Star Glassdoor rating and the only staffing company (< 1000 employees) to be voted in the national Top 10 Employees Choice - Best Places to Work by Glassdoor. + Voted Best Staffing Firm to Temp/Contract For seven times by Staffing Industry Analysts as well as a Best Company to Work For by Forbes, Fortune and Inc. magazine. As you are applying, please join us in fostering diversity, equity, and inclusion by completing the Invitation toSelf-Identify (https://www.paycomonline.net/v4/ats/web.php/jobs/ViewJobDetails?job=78910&clientkey=55336DD43EED5DE3CE2A2212C8A1FA1B) form today! www.LoveYourJob.com

Digital Prospectors Interview Questions

Digital Prospectors Interview Guides

Digital Prospectors Interview Questions

Digital Prospectors Salaries by Position

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