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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

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

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?

Garmin International Salaries by Position

Overview We are seeking a full-time Software Engineer 1 on the GNSS Team in our Salem, OR location. In this role, you will be responsible for building upon existing software solutions to develop basic software for Garmin products and/or applications. Essential Functions <ul> <li>Performs new product and/or application software design and development as well as maintenance activities for products and/or applications already in production using C, C++, C#, Java, assembly language, or other selected languages </li><li>Troubleshoots basic issue reports, reproduces issues, evaluates technical cause and implements and tests software solutions </li><li>Identifies and resolves defects of basic scope using proper engineering tools and techniques such as debuggers, emulators, simulators, and logic analyzers </li><li>Applies design standards and procedures using appropriate engineering tools to document and implement basic designs in an organized manner </li><li>Supports working hours as part of a rotating schedule to provide on call support of Garmin's 24/7 operations </li></ul>Basic Qualifications <ul> <li>Bachelor's Degree in Computer Science, Electrical Engineering, Computer Engineering, Software Engineering, Aerospace Engineering, Math, Physics or related field OR an equivalent combination of education and experience </li><li>Excellent academics (cumulative GPA greater than or equal to 3.0 as a general rule) </li><li>Demonstrated knowledge, education, experience and/or training necessary to develop basic software in C, C++, C#, Java, assembly language, or other selected languages </li></ul>Desired Qualifications <ul> <li>Outstanding academics (cumulative GPA greater than or equal to 3.5) </li><li>Previous work or internship experience in design, particularly for consumer products </li></ul> Garmin International is an equal opportunity employer. Qualified applicants will receive consideration for employment without regard to race, religion, color, national origin, citizenship, sex, sexual orientation, gender identity, veteran's status, age or disability. This position is eligible for Garmin's benefit program. Details can be found here: Garmin Benefits

Overview We are seeking a full-time Senior Mobile Engineer (Android) in our Olathe, KS location.In this role, you will be responsible for providing technical leadership and project planning for mobile development for products, applications, or systems new to Garmin. The selected engineer will be working in our Device Interaction department on our Garmin Connect Mobile training, fitness and outdoor projects. Essential Functions <ul> <li>Serves in a leadership capacity for carrying out Native mobile development in Android with Kotlin for new products and/or applications </li><li>May serve as a Lead Software Engineer for complex software development project designs and/or reviews architected modules and software systems supporting new technology or improving capability/performance of existing functionality </li><li>Decomposes functional requirements into well-defined tasks </li><li>Researches fundamental problems and implements algorithm solutions that are appropriate </li><li>Offers peer technical assessments in areas of expertise, new technologies and software designs </li><li>Assists design engineering as needed with component datasheet review and schematic design review </li><li>Participates in project leadership and/or program planning including providing technical input to product development plans and concept documents </li><li>Makes substantial contributions toward determination of project goal/objective feasibility and applies good judgment in setting schedules/risk taking </li><li>Mentors and provides guidance to less experienced Software Engineers (1 & 2) </li><li>Contributes to advanced technical research on new technologies </li><li>Offers process improvement suggestions and authors new procedures as appropriate </li><li>Provides reliable solutions to a wide range of difficult problems using sound problem solving techniques </li><li>Supports working hours as part of a rotating schedule to provide on call support of Garmin's 24/7 operations </li></ul>Basic Qualifications <ul> <li>Bachelor's Degree in Computer Science, Electrical Engineering, Computer Engineering, Software Engineering, Aerospace Engineering, Math, Physics or related field AND a minimum of 5 years relevant experience OR an equivalent combination of education and experience </li><li>Excellent academics (cumulative GPA greater than or equal to 3.0 as a general rule) </li><li>Demonstrated proficiency with designing well architectured software systems and modules that support new technology or improve capability/performance of existing functionality </li><li>Demonstrated competence with researching fundamental problems and implementing appropriate algorithmic solutions </li><li>Demonstrated ability to serve as a lead software engineer for a complex software project </li><li>Ability to decompose functional requirements into well-defined tasks while balancing quality, quantity, and complexity in work output </li><li>Demonstrated capability to offer peer technical assessments in areas of expertise, new technologies and software designs </li><li>Mastered proficiency in writing software in writing in Android with Kotlin and relevant experience and/or training in data structures or object-oriented design methodology </li><li>Demonstrated strong and effective verbal, written, and interpersonal communication skills </li><li>Must be positive, detail oriented, organized, team oriented and a driven problem solver, multi-tasker, and self-starter with the ability to prioritize and lead in a fast paced, deadline-driven environment </li></ul> Garmin International is an equal opportunity employer. Qualified applicants will receive consideration for employment without regard to race, religion, color, national origin, citizenship, sex, sexual orientation, gender identity, veteran's status, age or disability. This position is eligible for Garmin's benefit program. Details can be found here: Garmin Benefits

Garmin International Interview Questions

Garmin International Interview Guides

Garmin International Interview Questions

Garmin International Salaries by Position

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