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Grayce 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?

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

Job Position: Graduate Business Analyst – via the Grayce Graduate Development ProgrammeLocation: SheffieldStarting Salary: £25,000 Application Requirements:<ul><li>Minimum 2:1 or above in any undergraduate subject.</li><li>Ability to work on site 5 days a week.</li><li>Right to work in the UK unsponsored for the duration of the programme.</li></ul> Are you a curious, adaptable and proactive problem solver with strong communication skills and a drive to make an impact? At Grayce, we’re looking for ambitious graduates who are eager to learn, take ownership and build meaningful relationships while delivering excellence. If you’re resourceful, resilient, and passionate about driving change, join us and be part of a community that cares, collaborates, and thrives together. Understanding the types of roles available on our Business pathway: Business Analyst (BA): As a BA, you’d be responsible for investigating and analysing business needs, identifying improvement opportunities, defining requirements and ensuring solutions align with business objectives. BA’s take a holistic approach, considering people, processes, technology and organisational structure to deliver value while minimising risks. Project Manager (PM): This role supports the planning, execution and monitoring of projects to ensure they are delivered on time and within budget. They assist in task delegation, resource management, risk mitigation, stakeholder communication and process improvement while gaining experience in project lifecycle management. Project Management Office (PMO): This role establishes and maintains project management standards, ensuring timely delivery, scope/quality adherence and budget control while minimising risks. PMOs are responsible for overseeing governance, methodology, planning, stakeholder engagement, benefits tracking and risk management, often providing project performance insights to senior management. Product Manager: A product manager plays a pivotal role in orchestrating the development, launch and ongoing success of a product. They are responsible for defining the product vision, creating roadmaps and prioritising features based on customer needs and business goals, ensuring quality and functionality which resonates with key stakeholders. Why Grayce? We specialise in driving change and transformation for some of the world’s most ambitious organisations and for over a decade, we've partnered with FTSE 100 and 250 companies to deliver impactful results by developing and deploying high-performing talent in the UK and beyond. Our Accelerated Development Programme is designed to launch the careers of recent graduates eager to make an impact. We offer a fast-track route to expertise, allowing you to gain hands-on experience with one of our impressive clients in a variety of flexible roles. Opportunity: You'll embark on a journey of continuous learning, gaining industry-accredited qualifications, whilst getting hands-on experience, working full time on site directly with prestigious FTSE100, 250, and 500 organisations. Delivery: You will typically work for one client, delivering high quality outcomes during your Grayce tenure. The skills required for exceptional client delivery include include natural curiosity, proactivity, adaptability, effective communication and problem solving. Mentoring: Thrive under the guidance of our experienced Delivery Managers and Technical Trainers. They’ll be your go-to, offering support, insights and sharing experiences. Progression: Starting as an Analyst with the potential for significant salary progression, you will pick up invaluable skills and complete a minimum of 6 industry recognised accreditations during your time on the development programme. What makes a great Grayce Analyst?: 2:1 Undergraduate Degree: We are open to applicants from all undergraduate backgrounds with a minimum 2:1 degree. Analytical Problem Solving: We're looking for analytical minds that can spot patterns and think creatively. Whether it's dissecting complex issues or finding fresh angles, we highly value critical thinking skills and their application. Soft Skills: From effective communication styles to planning, organisation and a learning development mindset, Grayce is committed to building core consultancy skills. Stakeholder and time management are core skills we utilise every day and we look for examples of those through our interview process. Why work for us? Competitive Salary: Starting at £25,000 with potential for significant growth. Industry Recognition: We help you embark on your journey with fully funded, industry-recognised qualifications designed to maximise your experience and put you in control of your career. Mentors and Coaches: Access a network of mentors and coaches dedicated to you, your experiences and development at Grayce. Wellness Support: We are here for you 24/7 with our Employee Assistance Programme, offering confidential assistance ranging from financial and legal support to health and wellbeing. Grayce is not on the UK Border Agency's Sponsor Register and is unable to sponsor work visas for international applicants.

Role: Graduate Data Analyst – Sales and Marketing – Apply before 31st December 2025 Location: Basildon, UKStarting salary: £28,000Application requirements<ul><li>Achieved a 2:1 undergraduate degree in any degree subject</li><li>This role is due to begin in early 2026. Please only apply if you have completed your degree or will have finished your studies by this date.</li><li>Right to work in the UK unsponsored for the duration of the programme.</li><li>Ability to be on site 4/5 days a week.</li><li>A full UK driving licence with access to a vehicle</li></ul> About the roleGraduate Data Analyst – Sales and MarketingAs a Graduate Data Analyst – Sales & Marketing, you’ll play a key role in turning data into actionable insights that shape commercial strategies. You’ll work closely with Sales, Marketing, and senior stakeholders to produce reports, forecasts, and dashboards that inform decision-making and drive growth. From analysing campaign performance to identifying trends and opportunities, you’ll help translate complex data into clear recommendations that improve customer experience and business outcomes. Why Grayce?Grayce specialises in driving change and transformation for some of the world’s most ambitious organisations. For over a decade, we've partnered with FTSE 100 and 250 companies to deliver impactful results by developing and deploying high-performing talent in the UK and beyond. Our Accelerated Development Programme is designed to launch the careers of recent graduates eager to make an impact. We offer a fast-track route to expertise, allowing you to gain hands-on experience with one of our impressive clients in a variety of flexible roles such as Business Analysis, Software Engineering, Data Analysis and DevOps. You will have a tailored learning development journey bespoke to your role, meaning you are prepared for whatever the day throws at you, whilst learning key skills and gaining industry specific accreditations along the way. Join Grayce and accelerate your career! What makes a great Grayce Analyst?Education:<ul><li>Achieved a 2:1 undergraduate degree in any degree subject</li></ul>Technical Knowledge:<ul><li>Advanced Excel skills.</li><li>Familiarity with data analysis tools (SQL, Python) and data visualisation platforms (Power BI or similar).</li><li>Ability to interpret and present data insights clearly.</li></ul>Soft Skills:<ul><li>Strong communication and stakeholder engagement skills.</li><li>Analytical mindset and curiosity.</li><li>Ability to manage multiple priorities and work autonomously.</li></ul>

Position: Graduate Product Analyst - Apply before 31st December 2025Location: Basildon, UKStarting salary: £28,000Application requirements: <ul><li>Have achieved a 2:1 undergraduate degree in a relevant subject</li><li>These roles are due to begin in early 2026. Please only apply if you have completed your degree or will have finished your studies by this date</li><li>Right to work in the UK unsponsored for the duration of the programme</li><li>A full UK driving licence with access to a vehicle</li><li>Ability to be on site 4/5 days a week</li></ul> About the RoleProduct AnalystAs a Product Analyst, you’ll help shape product strategies by analysing market trends, customer needs, and performance data. You’ll work closely with product teams to deliver insights that drive innovation and improve user experience. This role offers exposure to product lifecycle management and the opportunity to develop strong analytical and stakeholder engagement skills. Why Grayce? Grayce specialises in driving change and transformation for some of the world’s most ambitious organisations. For over a decade, we've partnered with FTSE 100 and 250 companies to deliver impactful results by developing and deploying high-performing talent in the UK and beyond.Our Accelerated Development Programme is designed to launch the careers of recent graduates eager to make an impact. We offer a fast-track route to expertise, allowing you to gain hands-on experience with one of our impressive clients in a variety of flexible roles such as Business Analysis, Project Management, Data Analysis and DevOps.With your specialism in Product, you will have a tailored learning development journey bespoke to your role, meaning you are prepared for whatever the day throws at you, whilst learning key skills and gaining industry specific accreditations along the way.Join Grayce and accelerate your career! What makes a great Grayce Analyst? Education: A minimum 2:1 degree in any degree subjectTechnical Knowledge:<ul><li>Strong data analysis skills.</li><li>Experience working in a product team or digital environment is preferred</li></ul>Soft Skills:<ul><li>Interested in product and technology</li><li>Excellent communication and stakeholder engagement skills.</li><li>Proactive, detail-oriented, and eager to learn.</li></ul>

Apply now for a September 2026 startJob Position: Graduate Software EngineerLocation: Bridgend, WalesStart Date: September 2026Starting Salary: £25,000Application Requirements:<ul><li>An interest in building a career as a “low-code” applications developer, where you will be up-skilling on a prestigious and highly sought after, Enterprise Applications Development Platform. (No coding experience is required, however, an understanding of coding languages may be beneficial).</li><li>Right to work in the UK unsponsored for the duration of the programme. Grayce is not on the UK Border Agency's Sponsor Register and is unable to sponsor work visas for international applicants. </li><li>Commuting distance of Bridgend and a desire to remain in the area long-term. Must be able to be on site a minimum of three days a week.</li></ul> About Grayce:Grayce specialises in driving change and transformation for some of the world’s most ambitious organisations. For over a decade, we've partnered with FTSE 100 and 250 companies to deliver impactful results by developing and deploying high-performing Grayce Analysts (you!), in the UK and beyond.Our Accelerated Development Programme is designed to launch the careers of recent graduates eager to make an impact. We offer a fast-track route to expertise, allowing you to gain hands-on experience with one of our impressive clients.With your specialism in Applications Development, you will have a tailored learning development journey bespoke to your role, meaning you are prepared for whatever the day throws at you, whilst learning key skills and gaining industry specific accreditations along the way. About the Role:This is a fantastic opportunity to join one of our clients; a global, Specialist Insurance firm, with headquarters in London and Houston, and with a rapidly growing team in Bridgend, Wales.Working as Grayce Analysts, you will be deployed to our client to join their Product Engineering team, as a “Pega” Applications Developer.Pega is a “low-code” application development platform that enables organisations to rapidly design, build, and deploy applications involving workflow automation and AI-decisioning, without coding.This role presents a long-term career opportunity to join our end-client as full-time employees following completion of the Grayce Programme. Day To Day Responsibilities:<ul><li>Gather requirements from senior stakeholders across all areas of the organisation to understand business needs and create user stories.</li><li>Work effectively as part of agile project teams, engaging with Project Managers, Business Analysts, UX Designers, Testers and Product Owners to help scope out and deliver end-to-end projects.</li><li>Develop Pega Workflows across all business lines (Underwriting, London Market, Trade Credit, Financial Lines and more).</li><li>Working on Business Process Management (BPM) systems and Workflow Management Systems.</li><li>Work towards obtaining Pega Qualifications, through structured courses and learning, provided by the client.</li></ul> What makes a great Grayce Analyst?Analytical Problem Solving: We're looking for analytical minds that can spot patterns and think creatively. Whether it's dissecting complex issues or finding fresh angles, we highly value critical thinking skills and their application.Soft Skills: From effective communication styles to planning, organisation and a learning development mindset, Grayce is committed to building core consultancy skills. Stakeholder and time management are core skills we utilise every day and we look for examples of those through our interview process. Why Grayce?Our Analysts are actively involved in major global transformation programmes across diverse industries.Competitive Salary: Starting at £25,000 with potential for significant growth.Opportunity: Over the course of 2 years, you'll embark on a journey of continuous learning, gaining industry-accredited qualifications, whilst getting hands-on experience working directly with a prestigious global insurance firm.Mentoring: Thrive under the guidance of our experienced coaches and Technical Trainers. They’ll be your go-to, offering support, insights, sharing experiences.Community: Grayce doesn’t just talk about diversity and inclusion; we live and breathe it. Our community is built around an environment that values your unique perspective.Industry Recognition: We help you embark on your journey with fully funded, industry-recognised qualifications designed to maximise your experience and put you in control of your career.Wellness Support: We are here for you 24/7 with our Employee Assistance Programme, offering confidential assistance ranging from financial and legal support to health and wellbeing. Join Grayce and accelerate your career!

Job Position: Graduate Digital Analyst – via the Graduate Development ProgrammeLocations: LeicesterStarting Salary: £25,000Application Requirements: <ul><li>Minimum 2:1 or above in a STEM (Science, Technology, Engineering, and Math) subject</li><li>Right to work in the UK unsponsored for the duration of the programme.</li><li>Ability to work on site 5 days a week</li><li>This role requires a high level of security clearance. Applicants must have been based in the UK for the last five years as a minimum.</li></ul> Grayce is not on the UK Border Agency's Sponsor Register and is unable to sponsor work visas for international applicants. Are you a curious, adaptable, and proactive problem solver with strong communication skills and a drive to make an impact? At Grayce, we’re looking for ambitious graduates who are eager to learn, take ownership and build meaningful relationships while delivering excellence. This is a brilliant opportunity to learn how to analyse digital trends, implement new technologies, and contribute to cutting-edge digital solutions. You'll gain hands-on experience that will build a strong foundation for a successful career in the rapidly evolving digital landscape. Join us and be part of a community that cares, collaborates, and thrives together. Understanding the types of roles available to a Graduate Digital Analyst: DevOps Analyst Join us as a DevOps Analyst and become the vital link between software development and IT operations. This graduate role is your chance to learn how to build, automate, and streamline the process of getting software from the team to the users. You’ll get hands-on experience with the latest tools, helping to improve efficiency and ensure everything runs smoothly. This is a dynamic opportunity to gain valuable skills and play a key part in the fast-paced world of tech. InfoSec Analyst As an Information Security Analyst, you'll be at the forefront of the fight against cybercrime. This role is a great way to start your journey in tech, focusing on designing security systems, monitoring for threats, and responding to cyber-attacks. You'll learn to manage systems, conduct ethical hacking, and advise on security best practices, all while staying ahead of the latest threats to keep businesses safe. Software Developer Start your tech career as a Software Developer and dive into the full software development lifecycle. This role is a fantastic opportunity to work on real projects, helping to write, test, and debug code while learning from senior developers in a fast-paced environment. You'll gain hands-on experience with modern technologies and help build user-friendly applications, providing a solid foundation to launch a successful career. Service Desk AnalystStart your tech career as a Service Desk Analyst and become the first line of support for users across a dynamic organisation. This role offers a great opportunity to troubleshoot real issues, manage service requests, and learn how IT operations run in a fast-paced environment. You'll gain hands-on experience with enterprise systems, develop problem-solving skills, and work closely with experienced IT professionals- building a strong foundation for a career in tech support or infrastructure. Why Grayce?We specialise in driving change and transformation for some of the world’s most ambitious organisations and for over a decade, we've partnered with FTSE 100 and 250 companies to deliver impactful results by developing and deploying high-performing talent in the UK and beyond.Our accelerated development programme is designed to launch the careers of recent graduates eager to make an impact. We offer a fast-track route to expertise, allowing you to gain hands-on experience with one of our impressive clients in a variety of flexible roles. Opportunity: You'll embark on a journey of continuous learning, gaining industry-accredited qualifications, whilst getting hands-on experience, working full time on site directly with prestigious FTSE100, 250, and 500 organisations.Delivery: Typically will work for one client, delivering high quality outcomes during your Grayce tenure. The skills required for exceptional client delivery include natural curiosity, proactivity, adaptability, effective communication and problem solving.Mentoring: Thrive under the guidance of our experienced Delivery Managers and Technical Trainers. They’ll be your go-to, offering support, insights and sharing experiences.Progression: Starting as an Analyst with the potential for significant salary progression, you will pick up invaluable skills and complete a minimum of 6 industry recognised accreditations during your time on the development programme. What makes a great Grayce Analyst 2:1 Undergraduate Degree: An undergraduate degree with a minimum 2:1 within in a STEM field.Data Tools: Prior experience with tools such as Excel, SQL, Python, Azure, Splunk and WireShark are highly beneficial for this role.Analytical Problem Solving: We're looking for analytical minds that can spot patterns and think creatively. Whether it's dissecting complex issues or finding fresh angles, we highly value critical thinking skills and their application.Soft Skills: From effective communication styles to planning, organisation and a learning development mindset, Grayce is committed to building core consultancy skills. Stakeholder and time management are core skills we utilise every day and we look for examples of those through our interview process. Why work for us? Competitive Salary: Starting at £25,000 with potential for significant growth.Industry Recognition: We help you embark on your journey with fully funded, industry-recognised qualifications designed to maximise your experience and put you in control of your career.Mentors and Coaches: Access a network of mentors and coaches dedicated to you, your experiences and development at Grayce.Wellness Support: We are here for you 24/7 with our Employee Assistance Programme, offering confidential assistance ranging from financial and legal support to health and wellbeing.

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

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