Röchling Engineering Plastics Interview Questions and Answers

Assumptions of Linear Regression

• Linearity: The relationship between the independent and dependent variables is linear.

• Independence: The residuals are independent of each other.

• Homoscedasticity: The variance of residuals is constant across all levels of the independent variables.

• Normality: The residuals are normally distributed.

• No multicollinearity: The independent variables are not highly correlated with each other.

Evaluate machine learning model by analyzing metrics like accuracy, precision, recall, F1 score, ROC curve, and confusion matrix.

• Calculate accuracy to measure overall performance of the model.

• Use precision to evaluate the proportion of true positive predictions among all positive predictions.

• Consider recall to assess the proportion of true positive predictions among all actual positives.

• Calculate F1 score as a balance ...read more

ETL stands for Extract, Transform, Load. It is a process used to extract data from various sources, transform it into a consistent format, and load it into a target database or data warehouse.

• Extract: Involves extracting data from different sources such as databases, files, APIs, etc.

• Transform: Data is cleaned, validated, and transformed into a consistent format suitable for analysis.

• Load: The transformed data is loade...read more

The correct structure of a DBMS diagram includes entities, attributes, relationships, and keys.

• Entities represent the main objects in the database (e.g. Customer, Product).

• Attributes are characteristics of entities (e.g. CustomerID, ProductName).

• Relationships show how entities are related to each other (e.g. one-to-many, many-to-many).

• Keys uniquely identify each record in a table (e.g. Primary Key, Foreign Key).

QAP stands for Quality Assurance Plan and ITP stands for Inspection and Test Plan.

• QAP outlines the quality control procedures and processes to be followed during a project.

• ITP details the specific inspections and tests that will be conducted to ensure quality standards are met.

• Both documents are essential for ensuring quality and compliance in projects.

Total stations are electronic/optical instruments used in surveying and construction to measure angles and distances.

• Total stations combine a theodolite for measuring angles with a distance meter to calculate distances.

• They use a laser beam to measure distances to objects.

• Total stations are commonly used in construction, civil engineering, and land surveying.

• They provide accurate measurements for mapping, setting out b...read more

Soil compaction is done to increase soil density, improve load-bearing capacity, reduce water infiltration, and enhance root growth.

• Increase soil density to improve stability and reduce settling

• Improve load-bearing capacity for construction projects

• Reduce water infiltration to prevent erosion and improve drainage

• Enhance root growth by providing a stable environment for plants

• Common methods include using heavy machinery

HDPE liner is used for its durability, chemical resistance, and flexibility in various applications.

• HDPE liner is chosen for its high durability, able to withstand harsh environmental conditions.

• It is chemically resistant, making it ideal for use in containment systems for hazardous materials.

• HDPE liner is flexible, allowing it to conform to the shape of the surface it is being applied to.

• Common applications include la...read more

FDD tests are carried out by following a structured approach to identify defects in software development.

• FDD tests involve creating test cases based on functional requirements

• Tests are executed to verify if the software functions as expected

• Defects found during testing are logged and prioritized for resolution

• Regression testing is performed to ensure that fixes do not introduce new issues

I am interested in joining Kroll because of their reputation for excellence in the industry and the opportunity to work on challenging projects.

• Kroll has a strong reputation for excellence in the industry

• I am excited about the opportunity to work on challenging projects at Kroll

• I believe Kroll's values align with my own professional goals