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Cubic Corporation Interview Questions

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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

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?

Cubic Corporation Salaries by Position

Business Unit: Cubic Defense Company Details: When you join Cubic, you become part of a company that creates and delivers technology solutions in transportation to make people's lives easier by simplifying their daily journeys, and defense capabilities to help promote mission success and safety for those who serve their nation. Led by our talented teams around the world, Cubic is committed to solving global issues through innovation and service to our customers and partners. We have a top-tier portfolio of businesses, including DTECH Edge Computing and Networking, Cubic Transportation Systems (CTS) and Cubic Defense (CD). Explore more on Cubic.com. Job Details: Join DTECH Mission Solutions: Cubic's industry-leading provider of compute and networking solutions at the tactical edge! DTECH is looking for a talented Principal Fullstack Software Engineer to join our mission-focused team. At DTECH, we enable edge users to connect, secure, and analyze mission-critical data with trusted, scalable, and intuitive edge technologies. Our platforms provide a decisive advantage, combining advanced computing and networking capabilities to drive performance in the most demanding environments. Every solution we develop is mission-engineered for reliability and survival in challenging conditions, with an eye toward continual innovation for the next mission. Why Join Us? <ul><li>Be part of a team that is redefining the future of edge computing and networking. </li> </ul><ul> <li>Work with mission-proven technologies that help save lives and power some of the most critical operations. </li> </ul><ul> <li>Collaborate with industry experts and push the boundaries of what's possible. </li> </ul><ul> <li>Enjoy a dynamic, fast-paced environment where your contributions make a direct impact. </li> </ul><ul> <li>Hybrid work model with flexibility, offering 3 days on-site per week and a 9/80 schedule. #LI-hybrid </li></ul>Job Title: Principal Full Stack Software Engineer - Go/Node.JS/JavaScript Location: Hybrid- Ashburn, VA Are you a seasoned Full Stack Engineer with a passion for solving complex problems in a collaborative, Agile environment? If you're skilled in Go, Node.js, and Python, and enjoy leading projects with a focus on quality, efficiency, and innovation, we'd love to have you on our team. About the Role: You'll be joining an integrated product team to develop high-quality application software for hybrid cloud environments (AWS). As a Principal Full Stack Software Engineer, you'll work closely with talented engineers to design, build, and refine solutions that make a real impact. You'll also have the chance to mentor junior developers and influence our engineering practices. What You'll Do: <ul> <li>Collaborate with Agile team members to design, develop, test, and implement full-stack solutions. </li><li>Lead design and engineering efforts, including capturing and reviewing functional requirements. </li><li>Develop code for new application features and participate in architectural design and code reviews. </li><li>Help shape the team's development practices by contributing fresh ideas and tools. </li><li>Mentor junior team members and promote continuous learning within the team. </li></ul>What We're Looking For: <ul> <li>Technical Expertise: Proficient in Go and Node.js/JavaScript, with a strong grasp of computer science fundamentals, including data structures and algorithms. </li><li>Linux and Distributed Systems: Hands-on experience with Linux-based distributed systems, including development, debugging, and optimization. </li><li>RESTful Services & Databases: Experience building RESTful web services and working with open-source databases (e.g., MySQL, Postgres). </li><li>Front-End Frameworks: Skilled in modern frameworks like React or AngularJS. </li><li>Soft Skills: Strong communication skills and the ability to work with both technical and non-technical stakeholders. </li></ul>Nice-to-Have Skills: <ul> <li>Familiarity with TDD, BDD, and E2E testing. </li><li>Experience with AWS cloud services (AWS ECS, ECR, RDS, Route53). </li><li>Knowledge of CI/CD tools, Docker, Terraform, or Chef. </li><li>Understanding of networking. </li><li>Familiarity with tools like Jira, Confluence, and Git. </li></ul>Requirements: <ul> <li>8+ years of relevant experience with a Bachelor's degree in Computer Science or a similar field, or 6+ years with a Master's degree, or equivalent experience. </li><li>US Citizenship is required for this role. </li></ul> The description provided above is not intended to be an exhaustive list of all job duties, responsibilities and requirements. Duties, responsibilities and requirements may change over time and according to business need. Cubic Pay Range: $100,000 - $189,362 + benefits. The Cubic pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law. Worker Type: Employee

Cubic Corporation Interview Questions

Cubic Corporation Interview Guides

Cubic Corporation Interview Questions

Cubic Corporation Salaries by Position

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