Eclat Algorithm MCQs

By: Prof. Dr. Fazal Rehman | Last updated: August 7, 2024

1. What is the primary purpose of the Eclat algorithm in data mining?
a) Classification
b) Regression
c) Association rule mining
d) Clustering

Answer: c) Association rule mining

2. What does the Eclat algorithm use to find frequent itemsets?
a) Horizontal data format
b) Vertical data format
c) Cluster analysis
d) Decision trees

Answer: b) Vertical data format

3. How does the Eclat algorithm represent transactions in its approach?
a) As rows in a matrix
b) As a list of items
c) As a set of item IDs associated with transaction IDs
d) As a decision tree

Answer: c) As a set of item IDs associated with transaction IDs

4. Which of the following best describes the ‘intersection’ operation in the Eclat algorithm?
a) Combining two itemsets
b) Finding common transactions between itemsets
c) Removing duplicate items
d) Sorting items by frequency

Answer: b) Finding common transactions between itemsets

5. What is the primary difference between the Apriori and Eclat algorithms?
a) Eclat uses a horizontal data format, while Apriori uses a vertical data format
b) Eclat uses a vertical data format, while Apriori uses a horizontal data format
c) Eclat is used for clustering, while Apriori is used for classification
d) Eclat generates association rules, while Apriori does not

Answer: b) Eclat uses a vertical data format, while Apriori uses a horizontal data format

6. What is the main advantage of the Eclat algorithm over the Apriori algorithm?
a) Requires fewer database scans
b) Easier to implement
c) Can handle more complex data types
d) Generates more rules

Answer: a) Requires fewer database scans

7. What is a key characteristic of the Eclat algorithm in terms of computational efficiency?
a) It uses breadth-first search
b) It uses depth-first search
c) It uses a greedy approach
d) It uses a randomized approach

Answer: b) It uses depth-first search

8. Which of the following operations is critical for the Eclat algorithm to find frequent itemsets?
a) Union
b) Intersection
c) Difference
d) Summation

Answer: b) Intersection

9. In the context of the Eclat algorithm, what does the term ‘tidset’ refer to?
a) A set of items in a transaction
b) A set of transactions in which an item appears
c) A sorted list of item frequencies
d) A cluster of similar transactions

Answer: b) A set of transactions in which an item appears

10. Which data structure is commonly used to represent itemsets in the Eclat algorithm?
a) Array
b) Hash table
c) Bitset
d) Linked list

Answer: c) Bitset

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