MC	The aim of clustering is to come up with clusters such that the...	homogeneity within a cluster is minimized and the heterogeneity between clusters is minimized.	incorrect	homogeneity within a cluster is minimized and the heterogeneity between clusters is maximized.	incorrect	homogeneity within a cluster is maximized and the heterogeneity between clusters is maximized.	correct	homogeneity within a cluster is maximized and the heterogeneity between clusters is minimized.	incorrect	
MC	What is the correct ranking of the following analytics applications in terms of maturity?	Marketing Analytics (most mature), Risk Analytics (medium mature), HR Analytics (least mature).	incorrect	Risk Analytics (most mature), Marketing Analytics (medium mature), HR Analytics (least mature).	correct	HR Analytics (most mature), Marketing Analytics (medium mature), Risk Analytics (least mature).	incorrect	Risk Analytics (most mature), HR Analytics (medium mature), Marketing Analytics (least mature).	incorrect	
MC	The aim of clustering is to come up with clusters such that the...	homogeneity within a cluster is minimized and the heterogeneity between clusters is minimized.	incorrect	homogeneity within a cluster is maximized and the heterogeneity between clusters is minimized.	incorrect	homogeneity within a cluster is minimized and the heterogeneity between clusters is maximized.	incorrect	homogeneity within a cluster is maximized and the heterogeneity between clusters is maximized.	correct	
MC	Which statement is CORRECT?	The adjacency matrix representing a social network has the same number of rows and columns.	correct	To guarantee maximum independence and organizational impact of analytics, it is important that analytics is supervised only locally in the business units.	incorrect	The EU approach to privacy protection relies on industry-specific legislation and self-regulation. 	incorrect	Featurization in the context of neural networks refers to adding more local features to the data set.	incorrect	
MC	What statement about the adjacency matrix representing a social network is not true?	It has the same number of rows and columns. 	incorrect	It can include weights. 	incorrect	It is a symmetric matrix.	incorrect	It is sparse since it contains a lot of non-zero elements.	correct	
MC	OLAP (On-Line Analytical Processing) can help in which of the following steps of the analytics process?	Data collection	incorrect	Data denormalizatio	incorrect	Data transformation	incorrect	Data visualization	correct	
MC	Which of the following are interesting data sources to consider to boost the performance of analytical models?	Network data	incorrect	External data	incorrect	Unstructured data such as text data and multimedia data	incorrect	All of the above	correct	
MC	What statement about the adjacency matrix representing a social network is not true?	It is sparse since it contains a lot of non-zero elements.	correct	It can include weights. 	incorrect	It has the same number of rows and columns. 	incorrect	It is a symmetric matrix.	incorrect	
MC	Consider a data set with a multiclass target variable as follows: 25% bad payers, 25% poor payers, 25% medium payers and 25% good payers. In this case, the entropy will be:	Maximal	correct	Minimal	incorrect	
MC	Which statement is CORRECT?	Missing values and outliers can potentially provide useful information and should be analyzed before they are removed/replaced.	correct	Missing values and outliers should both always be replaced or removed.	incorrect	Missing values should always be replaced or removed.	incorrect	Outliers should always be replaced or removed.	incorrect