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Susquehanna International Group, Llp (Sig) 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

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?

Susquehanna International Group, Llp (Sig) Salaries by Position

<h5>Overview </h5>Susquehanna International Group (SIG) is seeking a talented Senior Big Data Engineer with development and database administration experience to join our Data Technologies Team. This team is responsible for developing and maintaining large and complex database systems using Hadoop, Oracle, and other technologies. In this role, you will: <ul><li>Design, develop, and support database applications for our data systems </li><li>Design, develop, and support Linux shell scripts and Python for batch processing </li><li>Design solutions using Hadoop, Hive, Druid, Spark technologies </li><li>Maintain and support our Oracle database instance and applications in a high-transaction environment </li><li>Perform routine and customary operational activities to ensure a stable database environment </li><li>Provide production support off hours/weekend, when needed </li> </ul>What you can expect from us: Real Impact: Youll be designing and optimizing systems that process massive amounts of data, ensuring high performance and stability. Youll see how your contributions towards developing and supporting leading-edge hardware and software solutions make a firm-wide impact that makes us all smarter, faster, and better. Collaboration: Our systems engineers, network architects, technical analysts and software developers work together to create competitive edge through best-in-class technical solutions. Growth: For many of our roles, we dont expect you to have prior industry experience in proprietary trading or financial services to succeed at Susquehanna International Group. Were looking for people who are naturally curious, relentless problem solvers, and have the desire to continuously innovate, learn, and grow. Benefits: SIG offers a wide array of competitive employee perks & benefits. <h5>What were looking for </h5> <ul><li>A minimum of 7 years of progressive experience with database development and database administration (Oracle preferred) </li><li>Bachelor's degree in Computer Science, Engineering, Mathematics, or a related discipline or its foreign equivalent </li><li>Experience working with large data sets (terabytes) </li><li>Strong communication skills and experience working directly with end users </li><li>Experience with query performance tuning </li><li>Experience with Python and Unix Shell scripting required </li><li>Experience with extracting or loading data between RDBMS and Big Data </li><li>Ability and flexibility to provide occasional off hour/weekend support </li> </ul>About SIGSIG is a global quantitative trading firm founded by a group of friends who share a passion for game theory and probabilistic thinking. We have incorporated this approach into our culture, where you will find relentless problem solvers within each of our core disciplines: Trading, Technology, and Quantitative Research. From offices around the world, our employees collaborate to make optimal decisions and are driven by the desire to achieve winning results together. What we doWe are experts in trading essentially all listed financial products and asset classes, with a focus on derivatives trading. Through market making and market taking, we handle millions of trading transactions around the world every day, providing liquidity and ensuring competitive prices for buyers and sellers. While our presence in the market is broad, our trading desks are highly specialized, allowing for a deep understanding of unique drivers of each asset class. SIG does not accept unsolicited resumes from recruiters or search firms. Any resume or referral submitted in the absence of a signed agreement will become the property of SIG and no fee will be paid. #LI-KD1

Susquehanna International Group, Llp (Sig) Interview Questions

Susquehanna International Group, Llp (Sig) Interview Guides

Susquehanna International Group, Llp (Sig) Interview Questions

Susquehanna International Group, Llp (Sig) Salaries by Position

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