10+ Holcim Interview Questions and Answers

XGBoost is a popular machine learning algorithm that uses gradient boosting to improve prediction accuracy.

• XGBoost stands for eXtreme Gradient Boosting.

• It is an ensemble learning method that builds a series of decision trees to make predictions.

• XGBoost uses gradient boosting to minimize errors by adding new models that complement the existing ones.

• It is known for its speed and performance in competitions like Kaggle.

• XGBoost is widely used in various fields such as finance, he...read more

SAP codes are used in the Order to Cash (OTC) process to identify various stages and transactions within the process.

• SAP codes are alphanumeric codes assigned to different stages and transactions in the OTC process.

• They help in tracking and managing orders, invoices, deliveries, and payments within SAP systems.

• Examples of SAP codes in OTC process include VA01 for creating sales order, VF01 for creating invoice, and VL01N for creating delivery.

Hypothesis testing is a statistical method used to make inferences about a population based on sample data.

• Hypothesis testing involves formulating a null hypothesis and an alternative hypothesis.

• The null hypothesis assumes that there is no significant difference or relationship, while the alternative hypothesis suggests otherwise.

• Statistical tests are then conducted to determine the likelihood of observing the data if the null hypothesis is true.

• Common tests include t-tests, ...read more

XGBoost is a popular machine learning algorithm that uses gradient boosting to improve model performance.

• XGBoost stands for eXtreme Gradient Boosting

• It is an ensemble learning method that builds multiple decision trees sequentially

• Each tree corrects errors made by the previous one, leading to a more accurate model

• XGBoost is known for its speed and performance in competitions like Kaggle

• It can handle missing data and is resistant to overfitting

Clustering is a technique used to group similar data points together based on certain characteristics.

• Clustering involves partitioning a set of data points into groups, or clusters, where points in the same cluster are more similar to each other than to those in other clusters.

• Common clustering algorithms include K-means, hierarchical clustering, and DBSCAN.

• Clustering is an unsupervised learning technique, meaning the algorithm learns patterns from the data without being expl...read more

Chain transmission uses metal chains to transmit power, while belt transmission uses belts made of rubber or other materials.

• Chain transmission is more durable and can handle higher loads compared to belt transmission.

• Belt transmission is quieter and smoother compared to chain transmission.

• Chain transmission requires more maintenance due to lubrication needs, while belt transmission is relatively maintenance-free.

• Examples: Chain transmission is commonly used in motorcycles an...read more

OWASP Top 10 is a list of the top 10 most critical web application security risks.

• Injection

• Broken Authentication

• Sensitive Data Exposure

• XML External Entities (XXE)

• Broken Access Control

• Security Misconfiguration

• Cross-Site Scripting (XSS)

• Insecure Deserialization

• Using Components with Known Vulnerabilities

• Insufficient Logging and Monitoring

Incremental refresh is a process of updating only the new or changed data in a dataset, rather than refreshing the entire dataset.

• Incremental refresh helps in reducing the time and resources required for data refresh.

• It is commonly used in data warehousing and business intelligence to keep the data up-to-date.

• For example, in a sales database, only the new sales transactions since the last refresh would be added to the dataset during an incremental refresh.

Joins in QlikView are used to combine data from multiple tables based on a common field.

• Joins are used to link tables together based on a common field or key.

• Common types of joins in QlikView include inner join, left join, right join, and outer join.

• Joins help in creating a single, unified view of data from multiple tables.

• Example: A common join in QlikView would be linking a 'Sales' table with a 'Product' table based on a 'Product ID' field.