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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?

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

Gxo logistics Salaries by Position

Logistics at full potential. At GXO, we're constantly looking for talented individuals at all levelswho can deliver the caliber of service our company requires. You know that a positive work environment creates happy employees, which boosts productivity and dedication. On our team, you'll have the support to excel at workand the resources to build a career you can be proud of. As the Senior Full .Net Engineer, you will provide technical leadership, including the design, development and delivery of business technology-enabled applications and shared services. This role drives proficiency within teams, provides resolution to technical issues, assures best practices are followed, and assists management in meeting strategic initiatives while contributing to smooth business operations. Join GXO, and we'll give you the support you need to excel at work and the resources to build a career that will exceed your expectations. Pay, benefits and more. We are eager to attract the best, so we offer competitive compensation and a generous benefits package, including full health insurance (medical, dental and vision), 401(k), life insurance, disability and more. What you'll do on a typical day: <ul> <li>Design, develop, and maintain Warehouse Management Systems (WMS) and supporting software Understand the functionality and configuration of the WMS </li><li>Provide in-depth technical web application programming expertise that meets technical specifications and business requirements </li><li>Design and develop highly scalable production level code using Microsoft technology stack and emerging open-source technologies </li><li>Design and development of custom user interface libraries and frameworks that provide uniform user experience across various enterprise applications </li><li>Design and development of responsive user interfaces for multi-device web and mobile apps. </li><li>Analyze business problems and propose software solutions, mentor junior programmers in the department </li><li>Provide estimates and create functional specifications and detailed design specifications for programs to be developed; convert system designs and technical specifications into program code for complex applications </li><li>Develop, test and maintain complex application software; comply with project standards and processes related to producing quality software products and documentation, and provide project management for moderately sized, complex efforts </li><li>Lead design/code review sessions and continuous process improvement efforts </li><li>Research business problems and propose software solutions, mentor junior programmers in the department </li><li>Debug and troubleshoot existing program code and correct errors as required; provide Level-4 support to resolve systems-related issues </li><li>Monitor software releases to production in a controlled, methodical manner and verify systems are stable after patching </li><li>Participate as a high-level technical expert in design development, coding, testing and debugging new software or significant enhancements to existing software for third-party customers; work with technical staff to understand problems with software, and develop specifications to resolve them </li></ul> What you need to succeed at GXO: At a minimum, you'll need: <ul> <li>Bachelor's degree in Software Engineering or related technical field, or certification in software engineering from ACM or IEEE or equivalent related work or military experience </li><li>2 years of relevant software development experience including creating business applications and within a fast-paced Enterprise software development environment </li><li>Experience working with, and enhancing, Continuous Integration (CI) and Continuous Development (CD) environments </li><li>Hands on full stack development experience using C#, .NET Core, AngularJS, SQL & No SQL databases (Oracle and Elastic preferred) </li></ul> It'd be great if you also have: <ul> <li>Bachelor's degree in computer science or substantial relevant experience </li><li>5 years of experience in IT solutions development with strong knowledge of the IT software development life cycle in a Fortune 500 company </li><li>Microsoft certification or course work (MCSE/MCITP/SCCM) </li><li>Experience in engineering end point solutions and enterprise rollout of solutions </li><li>General understanding of UX design principles and patterns </li><li>Experience in HTML, CSS, JavaScript and typescript programming </li><li>Solid understanding and experience with Angular or other modern JS frameworks like React, Vue </li><li>Experience UI development consuming RESTful APIs. </li><li>Experience with unit test frameworks (Karma, Jasmine) and familiarity with TDD </li><li>Familiarity with continuous integration and proficiency with version tools like Git, TFS and SVN </li><li>Knowledge of best practices and IT operations in an always-up, always-available service </li><li>Experience with automation/configuration management (infrastructure as code) tools </li><li>Experience in logistics and/or transportation management and business analysis </li><li>Experience with Oracle PL/SQL </li></ul> GXO is a leading provider of cutting-edge supply chain solutions to the most successful companies in the world. We help our customers manage their goods most efficiently using our technology and services. Our greatest strength is our global team - energetic, innovative people of all experience levels and talents who make GXO a great place to work. We are proud to be an Equal Opportunity/Affirmative Action employer. Qualified applicants will receive consideration for employment without regard to race, sex, disability, veteran or other protected status. GXO adheres to CDC, OSHA and state and local requirements regarding COVID safety. All employees and visitors are expected to comply with GXO policies which are in place to safeguard our employees and customers. All applicants who receive a conditional offer of employment may be required to take and pass a pre-employment drug test. The above statements are intended to describe the general nature and level of work being performed by people assigned to this classification. They are not intended to be construed as an exhaustive list of all responsibilities, duties and skills required of personnel so classified. All employees may be required to perform duties outside of their normal responsibilities from time to time, as needed. Review GXO's candidate privacy statement here.

Gxo logistics Interview Questions

Gxo logistics Interview Guides

Gxo logistics Interview Questions

Gxo logistics Salaries by Position

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