Practice Weak Entity Sets (3.7) - Entity-Relationship (ER) Model - Introduction to Database Systems
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Weak Entity Sets

Practice - Weak Entity Sets

Learning

Practice Questions

Test your understanding with targeted questions

Question 1 Easy

What is a weak entity set?

💡 Hint: Think about the limitations of identifying the entity by itself.

Question 2 Easy

What does the term 'identifying relationship' refer to?

💡 Hint: It helps associate the weak entity with its parent entity.

4 more questions available

Interactive Quizzes

Quick quizzes to reinforce your learning

Question 1

What is a weak entity set?

An entity that can stand alone
An entity without sufficient attributes for identification
An entity that is always strong

💡 Hint: Consider the characteristics of weak entities.

Question 2

True or False: The identifying relationship must be many-to-one.

True
False

💡 Hint: Think about how many weak entities relate to a strong entity.

1 more question available

Challenge Problems

Push your limits with advanced challenges

Challenge 1 Hard

Design an ER diagram that includes a weak entity set for classes with students and grades. Explain the identifying relationship and partial key.

💡 Hint: Think about how you can uniquely identify grades per student.

Challenge 2 Hard

Create a scenario where weak entities could cause problems in data integrity. Propose a solution.

💡 Hint: What happens when there are duplicate names in your data?

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Reference links

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