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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

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 you work for a social media company that has just done a launch in a new city. Looking at weekly metrics, you see a slow decrease in the average number of comments per user from January to March in this city.

The company has been consistently growing new users in the city from January to March.

What are some reasons why the average number of comments per user would be decreasing and what metrics would you look into?

What metric could be used to measure if active users are still engaging on the platform despite an overall decrease in the average number of comments per user?

What metric could be used to measure if active users are still engaging on the platform despite an overall decrease in the average number of comments per user?

Decreasing Comments

How would you investigate a decline in the average number of comments per user?

Dart container Salaries by Position

Manage engineering, reliability, maintenance and facilities operations in a facility containing multiple, complex operations with 200 or less employees with a focus on meeting Key Performance Indicators (KPI's) for safety, quality, production, maintenance, efficiency, and service. Day-to-Day Role: <ul> <li>Manage and promote practices and processes intended to provide safe products that comply with appropriate laws and regulations, meet the company quality standards, and serve the needs of our customers.</li> <li>Take ownership and demonstrate leadership necessary to achieve goals specific to Safety, Quality, Service, Efficiency and Employee Development</li> <li>Monitor KPI's anticipating and correcting trends which would compromise achievement of targets</li> <li>Lead by example to promote and encourage employees to strongly commit to safety and GMP (Good Manufacturing Practices)</li> <li>Provides management of engineering services for the installation, maintenance, and improvement of machinery, equipment and facilities</li> <li>Troubleshoot, analyze, identify, evaluate, propose, implement, and document maintenance plans and performance metrics:</li> <li>Failure, analysis, and corrective action procedures</li> <li>Equipment capacities and risks; and</li> <li>Other engineering solutions</li> <li>Develop and implement of preventive, predictive, and autonomous maintenance plans</li> <li>Investigate root-cause for repetitive damage and failure rates, and calculate costs that do not meet or follow the maintenance plans</li> <li>Evaluate, recommend, and acquire tools for use, including process analysis software, and other physical tools and resources specific to reliability and maintenance improvement</li> <li>Lead training efforts to ensure maintenance technicians have needed resources for standard operating procedures (SOP's), work instructions, specialty tools, and updated Preventive Maintenance (PM) kits</li> <li>Sets priorities for maintenance backlog and oversees long-range and short-range maintenance schedules.</li> <li>Lead continuous improvement initiatives</li> <li>Responsible for evaluating, installing and testing new equipment</li> <li>Ensures that maintenance standards are compliant with statutory health and safety regulations.</li> <li>Direct teams to assess progress, analyze problems, facilitate solutions, identify resources and adjust plans as needed</li> <li>Ensure that objectives are achieved at the lowest cost consistent with quality requirements</li> <li>Identify and recommend short- and long-term business strategies, understand and drive industry best practices</li> <li>Develop and convey broad, advanced conceptual ideas, and propose and persuade several diverse stakeholders, including senior manufacturing leadership</li> <li>Establish and communicate department goals</li> <li>Serve as a Subject Matter Expert (SME) on applicable machinery, equipment and facility for cross functional projects</li> <li>Understand, support and follow management expectations in alignment with company values </li></ul>Core Skills and Qualifications: The ideal candidate must possess all of the following: <ul> <li>Bachelor's degree with an emphasis in engineering or related field and seven (7) years of engineering, facilities and/or machinery maintenance experience</li> <li>Seven (7) years of progressive supervisory experience</li> <li>Two (2) years specific experience performing maintenance and equipment reliability</li> <li>Displays strong interpersonal skills and is accessible and approachable</li> <li>Demonstrated project management experience by having successfully managed and completed a large, complex engineering project</li> <li>Advanced knowledge of the practical application of engineering science and technology. This includes applying principles, techniques, procedures, and equipment to the design and production of various products</li> <li>Advanced knowledge of design techniques, tools, and principles involved in production of precision technical plans, blueprints, drawings, and models</li> <li>Understanding of reliability tools and strategies including direct experience facilitating Failure Mode and Effects Analysis (FMEA) or Reliability Centered Maintenance (RCM), and Root Cause Analysis (RCA)</li> <li>Advanced knowledge of raw materials, production processes, quality control, costs, and other techniques for maximizing the effective manufacture and distribution of products</li> <li>Knowledge of business and management principles specifically as it relates to maintenance planning, resource allocation, cost analysis and budgeting, people management, and leadership guidance</li> <li>Excellent verbal and written skills necessary in order to persuade and influence decision making of individuals, groups, or work teams, and to explain difficult situations</li> <li>Ability to communicate technical topics to non-technical audiences</li> <li>Ability to utilize and train employees of varying levels/skills on technology, processes and procedures</li> <li>Demonstration of minimum proficiency with the English language in order to ensure effective new hire training and on-going communications about safety and quality issues </li></ul>Preferred Skills and Qualifications: <ul> <li>Ten (10) years of engineering, facilities, machinery maintenance and/or reliability experience</li> <li>Five (5) years specific experience performing maintenance and equipment reliability</li> <li>Degree in mechanical, electrical or industrial engineering</li> <li>Experience managing multi-shift or continuous operations</li> <li>Paper converting, chemical or plastics processing, or packaging industrial experience</li> <li>Lean manufacturing experience </li> </ul> Overview: Dart makes everyday products that give people the freedom to enjoy the food & drinks they love, wherever they are. From to-go containers and dinnerware to tamper-evident food packaging and even the red Solo cup, Dart products have been keeping people on the go and having fun for more than 50 years. Dart is a family-owned, family-focused company of 13,000 employees united by a shared set of values. Headquartered in Mason, MI, Dart has 30 locations in four countries. Benefits: Dart Container full-time employees enjoy great benefits, including medical, dental, vision, life insurance, 401(k) with company matching contributions, paid vacation, paid holidays, short-term disability, tuition assistance, product discounts and more. Dart Container is a drug-free workplace. Candidates are subject to a drug test (excluding THC*/marijuana/cannabis) and background check at the time of offer. *THC testing ONLY when such testing is required by law. Dart Container is an equal opportunity employer and will consider all candidates for employment without regard to race, color, religion, sex, national origin, age, sexual orientation, gender identity, disability status, protected veteran status, or any other characteristic protected by law. https://www.dartcontainer.com/eeoaa/ If you have a disability and need an accommodation to access this website or for the application process, you should call Dart at (800) 545-3278 Ext 3370 or email us at ADArequests@dart.biz. Relay calls can be made by dialing 711 or the relay number for your state. If you experience difficulty applying online, you may call (800) 545-3278 Ext 3390 or email us at applicationassistance@dart.biz for assistance.

We have the ability to hire at theAssociate or Mid-levelfor this position. This position will work a hybrid schedule of 3 days on site in Mason, MI, and up to 2 days remote. The Associate and Data Engineer position translates business requirements into conceptual, logical, and physical data models within the Enterprise data warehouse. This role focuses on using standard methods to prep, transform, and stage information for business consumption. This data is used for decision making and applied analytics through all levels of the organization. Day to Day Role for Associate and Data Engineer Assist in identifying existing enterprise data inventory configurations and help articulate the requirements, technologies, connections and processes related to these components via drawings, documentation and current and future-state diagrams Work with other IT groups and architects to identify and define interfaces between data sources Work quickly to get initial data access and then more methodically to build automated, reliable ETL processes Encourage and support the consideration of sustainability and total cost of ownership factors when recommending technology choices for the enterprise Review and analyze the effectiveness and efficiency of existing systems Assist in developing strategies for improving or further leveraging technology solutions to meet business goals Maintain technical expertise, keeping current with evolving processes, systems, and technologies Share technical knowledge and skills with IT management and colleagues Recommend training, processes, tools and resources for use in implementing and supporting new and existing enterprise data warehouse design Participate in IT projects in a data modeling role, helping to guide integration planning, implementation and validation Actively participate in design review meetings for data requirements Core Skills and Qualifications for both Associate and Data Engineer Strong planning and organizing skills with the ability to coordinate the actions of a technical team Ability to utilize business sense and creativity to develop new ideas and solutions Ability to effectively manage and execute multiple tasks, projects and priorities Ability to effectively prioritize and direct the execution of tasks in a high-pressure environment Ability to think strategically and see how parts interact with the big picture Excellent verbal and written communication skills necessary in order to persuade and influence decision making of individuals, groups, or work teams, and to explain complex technical issues to technical and non-technical audiences Ability to travel up to 15% domestically and internationally Preferred Skills and Qualifications for both Associate and Data Engineer Bachelor's degree or Master's degree with an emphasis in information technology, computer science, or related field of study, Experience with Cloud Services (Microsoft Azure and O365 technologies) Software development experience Experience with C#, .Net, Python, Scala, PowerShell, or SQL Demonstrated success presenting technical information in a clear and concise way to technical and non-technical audiences using PowerPoint, Word and Excel Demonstrated success creating technical drawings using Visio Additional Skills and Qualifications for Associate Data Engineer Requires one of the following: Bachelor's degree with an emphasis in information technology, computer science or related field of study, OR Associate's degree with an emphasis in information technology, computer science or related field of study and two (2) years of IT experience High school diploma or equivalent and four (4) years of IT experience Experience in enterprise information technology environments Experience with data warehouses and data mashups Comprehensive

Dart container Interview Questions

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Dart container Interview Questions

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