Сховища знань та управління знаннями Course Materials & Test Answers | moodle.elct.lnu.edu.ua

Which algorithm is used to mine association rules?

Apriori

✅

KNN

❌

SVM

❌

PCA

❌

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Why use ontologies in KDD?

To reduce storage size

❌

To speed up clustering

❌

To add semantic structure to extracted knowledge

✅

To replace databases

❌

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What is the key idea of K-Means clustering?

Minimizing distance to cluster centroids

✅

Building decision trees

❌

Finding frequent itemsets

❌

Learning word embeddings

❌

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What is the goal of relation extraction?

Rank documents by relevance

❌

Compress text data

❌

Translate text

❌

Identify relationships between entities

✅

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What does Named Entity Recognition identify?

Outliers only

❌

Hidden database keys

❌

Clusters of numeric values

❌

Entities such as people, locations, organizations

✅

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What is a measure in OLAP?

A primary key

❌

A dimension attribute

❌

A hierarchy level

❌

Numerical data analyzed across dimensions

✅

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What does a fact table primarily store?

Quantitative measures and foreign keys

✅

Hierarchy definitions

❌

Textual descriptions

❌

Metadata only

❌

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What does filling an OLAP cube mean?

Normalizing dimensions

❌

Populating fact data across dimensions

✅

Defining metadata

❌

Creating hierarchies

❌

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What does drill-down operation provide?

More detailed data view

✅

Higher level summaries

❌

Data normalization

❌

Index rebuilding

❌

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What best describes a dimension?

Index structure

❌

Fact table row

❌

Business perspective for analyzing measures

✅

Aggregated numerical value

❌

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Сховища знань та управління знаннями

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