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Peterson Technologies Interview Questions

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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

Peterson Technologies Salaries by Position

<h3>Job Description</h3><div>Job Description<div>Peterson Technologies is seeking a Junior Software Engineer to support our Maryland customer in the Ft. Meade area.  This position requires an active DoD Security ClearanceJob Description:The Software Engineer develops, maintains, and enhances complex and diverse software systems (e.g., processing-intensive analytics, novel algorithm development, manipulation of extremely large data sets, real-time systems, and business management information systems) based upon documented requirements. Works individually or as part of a team. Reviews and tests software components for adherence to the design requirements and documents test results. Resolves software problem reports. Utilizes software development and software design methodologies appropriate to the development environment. Provides specific input to the software components of system design to include hardware/software trade-offs, software reuse, use of Commercial Off-the-shelf (COTS)/Government Off-the-shelf (GOTS) in place of new development, and requirements analysis and synthesis from system level to individual software components.No demonstrated experience is required. Bachelor’s degree in computer science or related discipline from an accredited college or university is required.Four (4) years of SWE experience on projects with similar software processes may be substituted for a bachelor’s degree. Qualifications - Analyze user requirements to derive software design and performance requirements - Design and code new software or modify existing software to add new features - Debug existing software and correct defects - Integrate existing software into new or modified systems or operating environments - Develop simple data queries for existing or proposed databases or data repositories - Provide recommendations for improving documentation and software development process standardsRequirements:The RapidFlow team has a backlog of software development tasks related to ingestion, processing, storage and display of data. This position requires someone with entry level software development skills and would rely on a more senior member of the team for oversight. Required: • Java • Some source code version management tool (e.g. Git) • Ability to communicate and work within a team Desired • Spring (spring boot, spring data) • Web architecture experience • Database Experience (NoSQL preferred, but RDBMS will suffice)Peterson Technologies will provide reasonable accommodations to applicants who are unable to utilize our online application system due to a disability. Please send your request to HR at jobs@ptech-llc.com.Peterson Technologies is an equal opportunity employer, and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, disability status, protected veteran status, or any other characteristic protected by law.Powered by JazzHRY3TD9CDM0V</div></div>

Peterson Technologies Interview Questions

Peterson Technologies Interview Guides

Peterson Technologies Interview Questions

Peterson Technologies Salaries by Position

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