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Fun, engaging games to boost memory, math fluency, typing speed, and English skills—perfect for learners of all ages.
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Knowledge
Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is a primary key?
💡 Hint: Think about what keeps records distinct within a table.
Question 2
Easy
What is a foreign key used for?
💡 Hint: Consider how tables relate in a database.
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What is a weak entity set?
- An entity set with a strong primary key
- An entity that relies on a strong entity for identification
💡 Hint: Think about how entity sets are classified.
Question 2
True or False: A foreign key can also serve as a primary key in its own table.
- True
- False
💡 Hint: Reflect on the relationship between tables.
Solve and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Design an ER diagram for a library system. Define strong and weak entities, including the mapping to a relational schema.
💡 Hint: Think about entity dependencies.
Question 2
Given an ER diagram with various types of entities and relationships, outline the conversion process to relational schemas, noting any normalization steps.
💡 Hint: Carefully analyze each entity relationship and its attributes.
Challenge and get performance evaluation