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Cls group Interview Questions

A/B Testing

Algorithms

Analytics

Machine Learning

Probability

Product Metrics

Python

Statistics

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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?

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?

In an A/B test, how can you check if assignment to the various buckets was truly random?

In an A/B test, which of the following is a common method to determine if the assignment to the test groups was truly random?

In an A/B test, which of the following is a common method to determine if the assignment to the test groups was truly random?

Random Bucketing

A/B Testing & Experimentation

Cls group Salaries by Position

Job Information:Functional Title - Assistant Vice President, Java Software Development EngineerDepartment - TechnologyCorporate Level - Assistant Vice PresidentReport to – Director, Application DevelopmentLocation – Iselin, NJ HybridExpected full-time salary range between $ 125,000 – 145,000 + variable compensation + 401(k) match + benefits Job Description:This position is with CLS Technology. The primary responsibilities of the job will be (a) Hands-on software application development(b) Level 3 support Duties, Responsibilities, and Deliverables:<ul><li>Develop scalable, robust applications utilizing appropriate design patterns, algorithms and Java frameworks</li><li>Collaborate with Business Analysts, Application Architects, Developers, QA, Engineering, and Technology Vendor teams for design, development, testing, maintenance and support</li><li>Adhere to CLS SDLC process and governance requirements and ensure full compliance of these requirements</li><li>Plan, implement and ensure that delivery milestones are met</li><li>Provide solutions using design patterns, common techniques, and industry best practices that meet the typical challenges/requirements of a financial application including usability, performance, security, resiliency, and compatibility</li><li>Proactively recognize system deficiencies and implement effective solutions</li><li>Participate in, contribute to, and assimilate changes, enhancements, requirements (functional and non-functional), and requirements traceability</li><li>Apply significant knowledge of industry trends and developments to improve CLS in-house practices and services</li><li>Provide Level-3 support. Provide application knowledge and training to Level-2 support teams</li></ul> Experience Requirements:<ul><li>5+ years of hands-on application development and testing experience with proficient knowledge of core Java and JEE technologies such as JDBC and JAXB, Java/Web technologies</li><li>Knowledge of Python, Perl, Unix shell scripting is a plus</li><li>Expert hands-on experience with SQL and with at least one DBMS such as IBM DB2 (preferred) or Oracle is a strong plus</li><li>Expert knowledge of and experience in securing web applications, secure coding practices</li><li>Hands-on knowledge of application resiliency, performance tuning, technology risk management is a strong plus</li><li>Hands-on knowledge of messaging middleware such as IBM MQ (preferred) or TIBCO EMS, and application servers such as WebSphere, or WebLogic</li><li>Knowledge of SWIFT messaging, payments processing, FX business domain is a plus</li><li>Hands-on knowledge of CI/CD practices and DevOps toolsets such as JIRA, GIT, Ant, Maven, Jenkins, Bamboo, Confluence, and ServiceNow.</li><li>Hands-on knowledge of MS Office toolset including MS-Excel, MS-Word, PowerPoint, and Visio</li><li>Proven track record of successful application delivery to production and effective Level-3 support.</li></ul> Success factors: In addition, the person selected for the job will <ul><li>Have strong analytical, written and oral communication skills with a high self-motivation factor</li><li>Possess excellent organization skills to manage multiple tasks in parallel</li><li>Be a team player</li><li>Have the ability to work on complex projects with globally distributed teams and manage tight delivery timelines</li><li>Have the ability to smoothly handle high stress application development and support environments</li><li>Strive continuously to improve stakeholder management for end-to-end application delivery and support</li></ul> Qualification Requirements:<ul><li>Bachelor Degree</li><li>Minimum 5 year experience in Information Technology</li></ul>

Question	Topic	Difficulty	Ask Chance
Boarding Times Bias	Statistics	Medium	Very High
Hundreds of Hypotheses	Statistics	Medium	Very High
Random Bucketing	A/B Testing & Experimentation	Medium	Very High

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