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Educational Testing Service (Ets) Interview Questions

A/B Testing

Algorithms

Analytics

Machine Learning

Probability

Product Metrics

Python

Statistics

Educational Testing Service (Ets) Interview Guides

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?

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

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?

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

A/B Testing & Experimentation

<h3>Job Description</h3><div>Job Description<div>About ETS:ETS is a global education and talent solutions organization enabling lifelong learners worldwide to be future-ready. For more than 75 years, we've been advancing the science of measurement to build benchmarks for fair and valid skill assessment across cultures and borders. Our worldwide impact extends through our renowned assessments including TOEFL®, TOEIC®, GRE® and Praxis® tests, serving millions of learners in more than 200 countries and territories. Through strategic acquisitions, we've expanded our global capabilities: PSI strengthens our workforce assessment solutions, while Edusoft, Kira Talent, Pipplet, Vericant, and Wheebox enhance our educational technology and assessment platforms across critical markets worldwide.Through ETS Research Institute and ETS Solutions, we're partnering with educational institutions, governments, and organizations globally to promote skill proficiency, empower upward mobility, and unlock opportunities for everyone, everywhere. With offices and partners across Asia, Europe, the Middle East, Africa, and the Americas, we deliver nearly 50 million tests annually. Join us in our journey of measuring progress to power human progress worldwide.Join Us at PSI, a wholly owned subsidiary of ETS - Where You Belong, Grow, and Thrive!At PSI, we believe that people achieve their best when they feel they truly belong. That's why fairness and opportunity are at the heart of everything we do - not just words, but values deeply embedded in our culture and the full employee experience.We're proud to foster an environment where everyone is supported to reach their full potential. From your first day through every step of your journey with us, you'll feel the difference in how we work, grow, and succeed together.What You Can Expect From Us - We know that great work starts with feeling valued. That's why we've benchmarked all our roles against local market rates and why you'll always see salary details in our job postings. We believe in transparency, and we want you to feel confident that your next move aligns with your expectations.About the RoleSenior Software Engineers work very closely with others across the engineering teams to understand the features that our products offer, then develop new functionality for our Go/Angular web-based applications with a MongoDB database, and integrate them with internal and third-party systems.This role adds significant value to the operation of PSI's business, performing crucial work in maintaining our people-focused, quality brand.This is a full-time permanent role, with flexible hours around core office availability Monday to Friday. The role can be performed remotely, with occasional travel required for meetings, events and workshops.Role Responsibilities<ul><li>Responsible for managing and executing end-to-end enhancements for key technology platforms and be accountable for projects.</li></ul><ul><li>Provide mentoring and guidance to more junior members of Software Engineering teams.</li><li>Develop enterprise class & scalable web applications.</li><li>Enhance and support existing web application functionality which includes new feature development and resolving complex code issues as reported.</li><li>Collaborate with subject matter experts, product managers and engineers to build modern, scalable, user friendly and functionally robust web applications in an AGILE environment.</li><li>Participate in all aspects of SDLC including analysis, requirements, design, implementation, testing and support.</li><li>Use principles, guidelines and best practices as defined.</li><li>Expected to manage reviewing and analyzing feature requirements.</li><li>Expected to create and maintain product knowledge documentation.</li><li>Expected to research and embrace new techniques and technology to improve the customer experience.</li><li>Other duties may be assigned.</li><li>Focus on quality throughout with strong unit testing.</li></ul>#LI-AD1#LI-REMOTE Knowledge, Skills and Experience Requirements<ul><li>Education to Bachelor's degree level in Computer Science or related field.</li><li>10+ years' experience in software engineering roles.</li><li>Experience with designing and creating APIs.</li><li>Experience in fault finding and resolving Priority 1 production issues.</li><li>Experience with relational databases like SQL Server and Mongo DB.</li><li>Familiarity with cloud technologies such as AWS.</li><li>Experience with Go, Angular, GIT and JIRA.</li><li>Experience with microservices architecture and accessibility work (specifically WCAG) desirable.</li><li>Strong experience in analyzing data for the root cause of recurring issues resulting in downstream effects.</li><li>Background in creating test suites for automation of regression testing</li></ul>-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Benefits & CultureAlongside a competitive salary, we offer a comprehensive benefits package designed to support your well-being, your future, and your sense of purpose:  <ul><li>Retirement Benefits: 401(k), pension, or country-specific retirement plans with employer contributions</li><li>Generous Time Off: Enhanced paid time off/annual leave policies</li><li>Health & Wellbeing Coverage: Medical insurance tailored to your region, plus:</li><ul><li>US: Dental, vision, life, and short-term disability insurance</li><li>UK: Medical cashback plan including dental, vision, and income protection</li></ul><li>Flexible Spending Accounts (US)</li><li>Employee Assistance Program (EAP): Confidential support whenever you need it</li><li>Work-Life Balance: We understand life happens outside of work, and we fully support flexibility</li><li>Wellness Culture: Regular global wellness initiatives to help you stay healthy and inspired</li><li>Future Planning: Tools and support to help you grow personally and professionally</li><li>Giving Back: Enjoy a Volunteer Day each year and opportunities to support our communities and industry</li></ul>At PSI, we're more than just a workplace - we're a global team driven by shared values and real impact. If you're ready to be part of a company that's committed to your growth and well-being, we'd love to hear from you.ETS is mission driven and action oriented<ul><li>We are passionate about hiring innovative thinkers who believe in the promise of education and lifelong learning.</li><li>We are energized by cultivating growth, innovation, and continuous transformation for the next generation of rising professionals as leaders. Â In support of this ETS offers multiple Business Resource Groups (BRG) for you to learn and advance your career growth!</li><li>As a not-for-profit organization we will encourage you to lean in to your passion for volunteering. Â At ETS you may qualify for up to an additional 8 hours of PTO for volunteer work on causes that are important to you!</li></ul> ETS is an Equal Opportunity Employer. We are committed to providing equal employment opportunities to all employees and applicants for employment without regard to race, color, religion, sex, national origin, age, disability, marital status, veteran status, sexual orientation, gender identity, or any other characteristic protected by law. We believe in creating a work environment where all individuals are treated with respect and dignity. </div></div>

<h3>Job Description</h3><div>Job Description<div>About ETS:ETS is a global education and talent solutions organization enabling lifelong learners worldwide to be future-ready. For more than 75 years, we've been advancing the science of measurement to build benchmarks for fair and valid skill assessment across cultures and borders. Our worldwide impact extends through our renowned assessments including TOEFL®, TOEIC®, GRE® and Praxis® tests, serving millions of learners in more than 200 countries and territories. Through strategic acquisitions, we've expanded our global capabilities: PSI strengthens our workforce assessment solutions, while Edusoft, Kira Talent, Pipplet, Vericant, and Wheebox enhance our educational technology and assessment platforms across critical markets worldwide.Through ETS Research Institute and ETS Solutions, we're partnering with educational institutions, governments, and organizations globally to promote skill proficiency, empower upward mobility, and unlock opportunities for everyone, everywhere. With offices and partners across Asia, Europe, the Middle East, Africa, and the Americas, we deliver nearly 50 million tests annually. Join us in our journey of measuring progress to power human progress worldwide.Senior Software EngineerLocation: Remote (with occasional travel) Schedule: Full-time, flexible hours around core office availabilityAbout the Role Join PSI, a wholly owned subsidiary of ETS, and help build technology that powers human progress. As a Senior Software Developer, you'll design and deliver high-quality software solutions that support our customers and advance our mission. You'll work independently, collaborate across teams, and mentor junior developers—bringing innovation and reliability to every project.Customers will include the US Government, therefore the successful candidate must be a US Citizen and be able to pass a level 1 (Confidential) security clearanceWhat You'll Do<ul><li>Design and Build: Develop, test, and deploy scalable web applications using Java/Spring and SQL.</li><li>Solve Problems: Diagnose complex issues, perform root cause analysis, and implement effective solutions.</li><li>Lead Projects: Take ownership of key initiatives and deliver results with minimal supervision.</li><li>Enhance Systems: Improve existing functionality and add new features to meet evolving business needs.</li><li>Collaborate: Work with product managers, engineers, and subject matter experts in an Agile environment.</li><li>Innovate: Research emerging technologies and apply best practices to improve performance and user experience.</li><li>Document and Share: Maintain clear product documentation and contribute to process improvements.</li></ul> What You Bring<ul><li>Bachelor's degree in Computer Science or equivalent experience.</li><li>5+ years in software development roles.</li><li>Strong skills in Java, Spring Framework, SQL, and modern front-end technologies (JavaScript, React, HTML, CSS).</li><li>Experience with APIs, Node.js, and version control tools (Git).</li><li>Familiarity with Agile practices and cloud platforms (Azure, AWS) preferred.</li><li>Excellent problem-solving ability and attention to detail.</li><li>Ability to work independently and manage priorities in a dynamic environment.</li><li>Must be a US Citizen and able to receive a level 1 security clearance</li></ul>Preferred Experience<ul><li>JSP development.</li><li>Accessibility standards (WCAG).</li><li>Tools like JIRA and enterprise-level debugging techniques.</li></ul>Behavioral Competencies<ul><li>Results-Oriented: Own your work and deliver with quality and accountability.</li><li>Customer-Focused: Understand user needs and create solutions that exceed expectations.</li><li>Collaborative: Communicate clearly and work effectively with diverse teams.</li><li>Innovative: Bring fresh ideas and embrace new technologies.</li><li>Adaptable: Learn quickly and thrive in changing environments.</li></ul>Why Join PSI and ETS?We believe in advancing learning and opportunity for all. At PSI and ETS, you'll work on technology that makes a difference—supported by a culture of integrity, innovation, and inclusion.#LI-AD1#LI-REMOTEETS is mission driven and action oriented<ul><li>We are passionate about hiring innovative thinkers who believe in the promise of education and lifelong learning.</li><li>We are energized by cultivating growth, innovation, and continuous transformation for the next generation of rising professionals as leaders. Â In support of this ETS offers multiple Business Resource Groups (BRG) for you to learn and advance your career growth!</li><li>As a not-for-profit organization we will encourage you to lean in to your passion for volunteering. Â At ETS you may qualify for up to an additional 8 hours of PTO for volunteer work on causes that are important to you!</li></ul> ETS is an Equal Opportunity Employer. We are committed to providing equal employment opportunities to all employees and applicants for employment without regard to race, color, religion, sex, national origin, age, disability, marital status, veteran status, sexual orientation, gender identity, or any other characteristic protected by law. We believe in creating a work environment where all individuals are treated with respect and dignity. </div></div>

<h3>Job Description</h3><div>Job Description<div>About ETS:ETS is a global education and talent solutions organization enabling lifelong learners worldwide to be future-ready. For more than 75 years, we've been advancing the science of measurement to build benchmarks for fair and valid skill assessment across cultures and borders. Our worldwide impact extends through our renowned assessments including TOEFL®, TOEIC®, GRE® and Praxis® tests, serving millions of learners in more than 200 countries and territories. Through strategic acquisitions, we've expanded our global capabilities: PSI strengthens our workforce assessment solutions, while Edusoft, Kira Talent, Pipplet, Vericant, and Wheebox enhance our educational technology and assessment platforms across critical markets worldwide. Through ETS Research Institute and ETS Solutions, we're partnering with educational institutions, governments, and organizations globally to promote skill proficiency, empower upward mobility, and unlock opportunities for everyone, everywhere. With offices and partners across Asia, Europe, the Middle East, Africa, and the Americas, we deliver nearly 50 million tests annually. Join us in our journey of measuring progress to power human progress worldwide. POSITION SUMMARYProgram & portfolio manager of Business Insights and Analytics efforts, as well as a leader in establishing a data-driven culture and coordination across GRE. Experts focused on medium- and long-term analytics innovation and prioritization with a holistic view across GRE.PRIMARY RESPONSIBILITIES<ul><li>Manage the business insights and analytics project portfolio and associated resources for GRE</li><li>Leverage data to independently propose optimizations across the business</li><li>Prioritize internal focus of innovation efforts and the corresponding training needed to drive toward an analytics-embedded organization</li><li>Measure and report on KPI's across diverse teams and report to leadership on a regular basis</li><li>Understanding of key data & analytics capabilities and how they can enable better business decisions</li><li>Ability to clearly communicate with senior leadership and prioritize efforts across functional areas</li><li>Presence of long-term vision for analytics in GRE</li><li>Strong understanding of data management, statistical analysis, modeling, reporting and visualization tools and software</li><li>Clear vision of emerging analytics capabilities (e.g., AI modeling)</li><li>Work with the leadership to map out future state and roadmap for embedding analytical competence throughout GRE</li><li>Drive analytics process standardization and adoption of tools and methods</li><li>Adhere to ethical standards and comply with the laws and regulations applicable to your job function</li></ul>#LI-NK1 EDUCATION AND EXPERIENCE<ul><li>Undergraduate degree (or relevant experience) in related quantitative or STEM field or an equivalent combination of education and experience from which comparable knowledge and abilities can be acquired is necessary</li><li>5+ years of diverse experience in data analysis, handling increasingly more complex and diverse data analyses is necessary. Desire to stay up to date with ongoing changes in AI capabilities and how they can be used to drive business results is essential</li></ul>ETS is mission driven and action oriented<ul><li> We are passionate about hiring innovative thinkers who believe in the promise of education and lifelong learning. </li><li> We are energized by cultivating growth, innovation, and continuous transformation for the next generation of rising professionals as leaders. Â In support of this ETS offers multiple Business Resource Groups (BRG) for you to learn and advance your career growth! </li><li> As a not-for-profit organization we will encourage you to lean in to your passion for volunteering. Â At ETS you may qualify for up to an additional 8 hours of PTO for volunteer work on causes that are important to you! </li></ul> ETS is an Equal Opportunity Employer. We are committed to providing equal employment opportunities to all employees and applicants for employment without regard to race, color, religion, sex, national origin, age, disability, marital status, veteran status, sexual orientation, gender identity, or any other characteristic protected by law. We believe in creating a work environment where all individuals are treated with respect and dignity. </div></div>

Question	Topic	Difficulty	Ask Chance
Boarding Times Bias	Statistics	Medium	Very High
Hundreds of Hypotheses	Statistics	Medium	Very High
Random Bucketing	A/B Testing & Experimentation	Medium	Very High

Educational Testing Service (Ets) Interview Questions

Educational Testing Service (Ets) Interview Guides

Educational Testing Service (Ets) Interview Questions

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