Relational Model Concepts Cognitive Class Exam Answers:-

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Course Name :- Relational Model Concepts

Relational Model Concepts Cognitive Class Final Exam Answers:-

Question 1.Which one of these statements is incorrect?

• A relational database is a set of relations.
• A Relation is made up of 2 parts: Relational Schema and Relational Instance.
• A relational database is a set of relations.
• None of the above

Question 2.What are the building blocks of the Relational Model?

• Collections and Items
• Mathematical model and terms
• Relations and sets
• Index and Elements

Question 3.Which one of these statements is incorrect if a relation is made up of 5 tuples?

• The cardinality of the relation is 5
• The degree of the relation is 5
• The relation contains 5 rows
• None of the above

Question 4. Which one of these statements is correct about Set in relational model concepts?

• It would have no order and no duplicates.
• It is a collection of items of the same type.
• It is an unordered collection of distinct elements.
• All of the above statements

Question5. Which one of these statements is correct if a relation is made up of 5 attributes?

• The cardinality of the relation is 5
• The degree of the relation is 5
• The relation contains 5 rows
• All of the above