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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?

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

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?

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SDETO’Fallon, MO - - Onsite 12 months contract Role: <ul><li>Software Engineer who will be testing (QA Testing is primary function)</li><li>Must understand Microservices which are deployed into PCF</li><li>Want an understanding of Cloud basics (any public cloud)</li><li>There won’t be any hands-on coding unless the employee wants to</li><li>Karate frameworks used for Regression testing.</li><li>Behavior Driven Development knowledge is a must</li><li>Cucumber frameworks used</li><li>This QA will do functional testing</li><li>Team uses Scaled Agile. QA steps in after coding is done and Unit Testing has complete.</li><li>Regression test cases (Karate) are being added to stay up to date</li><li>RESTful knowledge is helpful (Postman used for API testing)</li><li>QA will look at Splunk logs to determine if issues are data or coding related (troubleshooting and logical thinking)</li><li>CI/CD – Jenkins used for orchestration tool</li><li>Basic knowledge of Kafka is good to have.</li><li>Performance Testing is not required. Will be entirely doing Regression and Functional Testing.</li></ul>

Need USC/GC on W2 Job Title: Software Engineer IILocation: O’Fallon, MO (Hybrid) Duration: 12 MonthsPosition Type: Contract on W2 Job Description:Software Engineer who will be testing (QA Testing is primary function)Must understand Microservices which are deployed into PCFWant an understanding of Cloud basics (any public cloud)There won’t be any hands-on coding unless the employee wants toKarate frameworks used for Regression testing.Behaviour Driven Development knowledge is a mustCucumber frameworks usedThis QA will do functional testingTeam uses Scaled Agile. QA steps in after coding is done and Unit Testing has complete.Regression test cases (Karate) are being added to stay up to dateRESTful knowledge is helpful (Postman used for API testing)QA will look at Splunk logs to determine if issues are data or coding related (troubleshooting and logical thinking)CI/CD – Jenkins used for orchestration toolBasic knowledge of Kafka is good to have.Performance Testing is not required. Will be entirely doing Regression and Functional Testing.

******NO C2C/3rd party******* Responsibilities:Software Engineer responsible for designing and developing prototypes and performing complicated application coding and programming. This position interprets end-user business requirements to develop and modify technical design specifications for off-the-shelf and custom-developed applications. Qualifications:Bachelor's degree in Computer Science, Computer Information Systems, Management Information Systems, or a related field preferred Required Skills:<ul><li>Must have at least 8 years of experience in Java-based software development</li><li>Proficient knowledge of Java & J2EE (including JSP, JDBC, SQL, XML, HTML, and associated technologies) and the use of those technologies in n-tier development environments</li><li>Proficient knowledge is also expected in object-oriented application development principles, theories, and concepts using J2EE-specific design patterns and usage</li><li>Experience with frameworks such as Spring MVC, Hibernate, Spring, and JPA is required.</li><li>Proficiency in developing declarative and component-based single-page-applications (SPA) using Vue.js</li><li>Experience with modern JavaScript language features (ES6, ECMAScript 2015)</li><li>Knowledge of Typescript language features</li><li>Working knowledge of the Jest framework for unit testing is a plus</li><li>Comfortable working in the Eclipse IDE</li><li>Experience with unit testing</li><li>Experience with build scripts (Gradle is a plus).</li><li>Experience with HTML, JavaScript (AngularJS 1 & JQuery), and Cascading Style Sheets (CSS)</li><li>Experience with the configuration and setup of J2EE application servers</li></ul>

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