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Mission support and test services Interview Questions

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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 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

Mission support and test services Salaries by Position

Overview Mission Support and Test Services, LLC (MSTS) manages and operates the Nevada National Security Site (NNSS) for the U.S. National Nuclear Security Administration (NNSA). Our MISSION is to help ensure the security of the United States and its allies by providing high-hazard experimentation and incident response capabilities through operations, engineering, education, field, and integration services and by acting as environmental stewards to the Sites Cold War legacy. Our VISION is to be the user site of choice for large-scale, high-hazard, national security experimentation, with premier facilities and capabilities below ground, on the ground, and in the air. (See NNSS.gov for our unique capabilities.) Our 2,750+ professional, craft, and support employees are called upon to innovate, collaborate, and deliver on some of the more difficult nuclear security challenges facing the world today. In this environment, the best ideas need to be voiced and every opinion matters. As such, MSTS places great value on Diversity, Equity, and Inclusion and is committed to a diverse and equitable workforce, with an inclusive culture that values and celebrates the diversity of our people, talents, ideas, and perspectives. MSTS offers our full-time employees highly competitive salaries and benefits packages including medical, dental, and vision; both a pension and a 401k; paid time off and 96 hours of paid holidays; relocation (if located more than 75 miles from work location); tuition assistance and reimbursement; and more. MSTS is a limited liability company consisting of Honeywell International Inc. (Honeywell), Jacobs Engineering Group Inc. (Jacobs), and HII Nuclear Inc. Responsibilities We are looking for Geophysical Data Scientist candidates with strong analytical backgrounds, to work across multiple teams at the Special Technologies Laboratory in Santa Barbara, CA, supporting the design and development of modeling and simulation of fluids as well as algorithms to interpret geophysical data for national security related projects. The position is part of an interdisciplinary team that values a diversity of subject backgrounds. Key Responsibilities Contribute to geophysical data science research in support of national security problems, in support of Department of Energy Defense Nuclear Nonproliferation, Department of Defense, and Intelligence Community Partners. Assist in the design, development and implementation of algorithms and software for autonomous, real time data analysis. Execute innovative research projects in data science and signal processing fields. Collaborate with partner labs throughout the DOE infrastructure and academia. Contribute to technical reports and deliverables. Perform other duties assigned by Management. Qualifications Bachelors degree in applied mathematics, electrical, software or computer Engineering, or a calculus-based physical science plus 2 years of relevant experience.Skill building experience must demonstrate either deeper technical specialization or additional cross-disciplinary knowledge. Graduate research experience may be recognized. Masters degree or PhD in a STEM field with either graduate or undergraduate degree in a calculus-based physical science, engineering or applied mathematics field is highly desire. Proficiency with common compiled and interpreted scripting languages such C, C++ or Python is required. Experience developing statistical concepts to create solutions to physical science problems is required. Proficiency with signal processing, data exploration, and statistical analysis techniques is highly desired. Interest in machine learning methods, including clustering, regression, and classification is preferred. Experience with data visualization tools and user interfaces is preferred. Experience in developing models of physical phenomena to correlate with measured data is preferred. Ability to manage multiple tasks and priorities is desired. Excellent written and oral communication skills are highly desired. The primary work location will be at the Special Technologies Laboratory (STL) located in Santa Barbara, CA. Work schedule for this position will be 4/10s, Monday Thursday (subject to change). Pre-placement physical examination, which includes a drug screen, is required. MSTS maintains a substance abuse policy that includes random drug testing. Must have a valid driver's license. MSTS is required by DOE directive to conduct a pre-employment drug test and background review that includes checks of personal references, credit, law enforcement records, and employment/education verifications. Applicants offered employment with MSTS are also subject to a federal background investigation to meet the requirements for access to classified information or matter if the duties of the position require a DOE security clearance. Substance abuse or illegal drug use, falsification of information, criminal activity, serious misconduct or other indicators of untrustworthiness can cause a clearance to be denied or terminated by DOE, resulting in the inability to perform the duties assigned and subsequent termination of employment. In addition, Applicants for employment must be able to obtain and maintain a DOE Q-level security clearance, which requires U.S. citizenship, at least 18 years of age. Reference DOE Order 472.2 (https://www.directives.doe.gov/directives-documents/400-series/0472.2-BOrder-chg1-pgchg) , Personnel Security. If you hold more than one citizenship (i.e., of the U.S. and another country), your ability to obtain a security clearance may be impacted. Department of Energy Q Clearance (position will be cleared to this level). Reviews and tests for the absence of any illegal drug as defined in 10 CFR Part 707.4 (http://www.ecfr.gov/cgi-bin/text-idx?SID=14b1c770db022992d237769fbe9fc519&mc=true&node=se10.4.707_14&rgn=div8) , Workplace Substance Abuse Programs at DOE Sites, will be conducted. Applicant selected will be subject to a Federal background investigation, required to participate in subsequent reinvestigations, and must meet the eligibility requirements for access to classified matter. Successful completion of a counterintelligence evaluation, which may include a counterintelligence-scope polygraph examination, may also be required. Reference 10 CFR Part 709 (http://www.ecfr.gov/cgi-bin/text-idx?tpl=/ecfrbrowse/Title10/10cfr709_main_02.tpl) , Counterintelligence Evaluation Program. MSTS is an Equal Opportunity/Affirmative Action Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, veteran status or other characteristics protected by law. MSTS is a background screening, drug-free workplace. Annual salary range for this position is:$82,784.00 - $124,196.80. Starting salary is determined based on the position market value, the individual candidate education and experience and internal equity. Posted Date2 weeks ago(8/13/2024 12:44 PM) Job ID2024-7659 of Openings1 CategorySciences TypeFull-Time Location : CitySanta Barbara Location : State/Province (Full Name)California

Overview: Mission Support and Test Services, LLC (MSTS) manages and operates the Nevada National Security Site (NNSS) for the U.S. National Nuclear Security Administration (NNSA). Our MISSION is to help ensure the security of the United States and its allies by providing high-hazard experimentation and incident response capabilities through operations, engineering, education, field, and integration services and by acting as environmental stewards to the Sites Cold War legacy. Our VISION is to be the user site of choice for large-scale, high-hazard, national security experimentation, with premier facilities and capabilities below ground, on the ground, and in the air. (See NNSS.gov for our unique capabilities.) Our 2,750+ professional, craft, and support employees are called upon to innovate, collaborate, and deliver on some of the more difficult nuclear security challenges facing the world today. In this environment, the best ideas need to be voiced and every opinion matters. As such, MSTS places great value on Diversity, Equity, and Inclusion and is committed to a diverse and equitable workforce, with an inclusive culture that values and celebrates the diversity of our people, talents, ideas, and perspectives. <ul> <li>MSTS offers our full-time employees highly competitive salaries and benefits packages including medical, dental, and vision; both a pension and a 401k; paid time off and 96 hours of paid holidays; relocation (if located more than 75 miles from work location); tuition assistance and reimbursement; and more. </li><li>MSTS is a limited liability company consisting of Honeywell International Inc. (Honeywell), Jacobs Engineering Group Inc. (Jacobs), and HII Nuclear Inc. </li></ul>Responsibilities: Reports to the DAF Engineering Manager. Responsible for management of DAF engineers and engineering activities associated with the DAF Electrical, Mechanical, & Communications and Civil, Structural, & Architectural groups. Key Responsibilities <ul> <li>Understand and maintain the assigned systems design requirements per the DAF Documented Safety Analysis. </li><li>Ensure that design output documents appropriately reflect the design basis and required functional classification of the assigned DAF Structures, Systems and Components (SSCs). </li><li>Assure that the design requirements and design basis are fully identified and in a form compatible to maintain and control the design basis. </li><li>Authorize facility Configuration Management changes and manage the configuration of assigned DAF facility systems. </li><li>Provide technical support in the areas of construction, maintenance, and nuclear operations. </li><li>Coordinate with engineers, project managers, and maintenance personnel to ensure proper testing and documentation is developed to support component and system specifications, functions, and operability. </li><li>Develop and maintain engineering documents, reports, and correspondence to enable business activity. </li><li>Must effectively communicate to confer and gather information from subject matter experts for inclusion into specifications to ensure technical accuracy and completeness of the content. </li><li>Perform a wide range of tasks and special assignments that require comprehensive knowledge of engineering processes and procedures with the ability to analyze, interpret, and make recommendations. </li><li>Maintain staff by recruiting, selecting, orienting, training, and developing growth opportunities for employees. </li><li>Maintain a safe, secure, and legal work environment. </li><li>Accomplish staff results by communicating job expectations; planning, monitoring, and appraising job results; coaching, counseling, and disciplining employees; developing, coordinating, and enforcing systems, policies, procedures, and productivity standards. </li><li>Create an environment where employees feel safe to raise issues, empowered to address issues, and supported to resolve issues. </li><li>Demonstrate environment, safety, health, and quality leadership and consistently enforce environment, safety, health, and quality policies and procedures. </li><li>Implement applicable environment, safety, health, and quality requirements; emphasize the safety of each employee, and the protection of equipment and property in area of responsibility. </li><li>Take immediate action to correct reported or observed unacceptable environment, safety, health and quality conditions and/or behaviors. </li><li>Assure that appropriate procedures, training, equipment, warnings, and tools are provided to employees to permit work to be performed safely. </li><li>Effectively interface and communicate with MSTS leadership, National Weapons Lab personnel, Nevada Field Office (NFO), and Defense Nuclear Safety Board (DNFSB) representatives. </li><li>Promote and actively participate in the Mission Support and Test Services (MSTS) safety concept. </li><li>Support and encourage employee participation in MSTS environment, safety, health, and quality initiatives. </li></ul> Qualifications: <ul> <li>Bachelor's degree or equivalent training and experience, plus a minimum of 11 years of related and progressively responsible experience. </li> <li>DOE STD 3009 is preferred, however, experience working in a government regulated industry is acceptable. </li><li>Experience working with requirements-based systems or industries. </li><li>Experience, skill, and/or training in the function of performing workload distribution and execution of the work. </li><li>Skilled in working and communicating effectively with project functional groups, primarily Design Engineering, Construction, Project Management, and other services. </li><li>Must possess excellent interpersonal skills and ability to interact with all types of people in a tactful, professional, and effective manner while maintaining confidentiality. </li><li>Must be able to cope with conflicting deadlines, heavy workloads, and constant interruptions. </li><li>Demonstrated leadership qualities with emphasis on continuous improvement and team building. </li><li>Knowledge of nuclear safety basis, technical vocabularies, and terminology common to the assignment. </li><li>Ability to work with limited supervision and under general direction. </li><li>Learns quickly, detail oriented, and able to work within a team environment where challenges become opportunities. </li><li>The candidate must be proficient in standard office software (e.g. Word, Excel, PowerPoint). </li><li>Skilled in business usage of the English language. </li><li>Must be able to obtain and maintain HRP certification. </li><li>The primary work location will be at the Nevada National Security Site (located 65 miles northwest of Las Vegas, Nevada). </li><li>Work schedule will be 4/10s Monday through Thursday (subject to change). </li><li>Pre-placement physical examination, which includes a drug screen, is required. MSTS maintains a substance abuse policy that includes random drug testing. </li><li>Must possess a valid drivers license. </li></ul> MSTS is required by DOE directive to conduct a pre-employment drug test and background review that includes checks of personal references, credit, law enforcement records, and employment/education verifications. Applicants offered employment with MSTS are also subject to a federal background investigation to meet the requirements for access to classified information or matter if the duties of the position require a DOE security clearance. Substance abuse or illegal drug use, falsification of information, criminal activity, serious misconduct or other indicators of untrustworthiness can cause a clearance to be denied or terminated by DOE, resulting in the inability to perform the duties assigned and subsequent termination of employment. In addition, Applicants for employment must be able to obtain and maintain a DOE Q-level security clearance, which requires U.S. citizenship, at least 18 years of age. Reference DOE Order 472.2, Personnel Security. If you hold more than one citizenship (i.e., of the U.S. and another country), your ability to obtain a security clearance may be impacted. Department of Energy Q Clearance (position will be cleared to this level). Reviews and tests for the absence of any illegal drug as defined in 10 CFR Part 707.4, Workplace Substance Abuse Programs at DOE Sites, will be conducted. Applicant selected will be subject to a Federal background investigation, required to participate in subsequent reinvestigations, and must meet the eligibility requirements for access to classified matter. Successful completion of a counterintelligence evaluation, which may include a counterintelligence-scope polygraph examination, may also be required. Reference 10 CFR Part 709, Counterintelligence Evaluation Program. MSTS is an Equal Opportunity/Affirmative Action Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, veteran status or other characteristics protected by law. MSTS is a background screening, drug-free workplace. Annual salary range for this position is: $121,326.40 - $194,126.40. Starting salary is determined based on the position market value, the individual candidate education and experience and internal equity.

Mission support and test services Interview Questions

Mission support and test services Interview Guides

Mission support and test services Interview Questions

Mission support and test services Salaries by Position

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