Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What does an entity represent in a database?
💡 Hint: Think about tables in a database.
Question 2
Easy
What is the purpose of attributes in an entity?
💡 Hint: Consider what information is stored in each table.
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Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What does 'cardinality' indicate in an ERD?
- Number of attributes
- The type of entity
- How many instances relate
💡 Hint: Think about the relationship between a customer and their orders.
Question 2
True or False: Attributes are the characteristics of entities.
- True
- False
💡 Hint: Remember what information each entity holds.
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Challenge Problems
Push your limits with challenges.
Question 1
Design an ERD for an online store including entities like Products, Customers, and Orders. Explain your choices of attributes and relationships.
💡 Hint: Think about how online shopping works!
Question 2
Discuss the impact of normalization on database performance and provide an example of how an unnormalized database may perform poorly.
💡 Hint: Consider the difference between storing data once versus multiple times.
Challenge and get performance evaluation