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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What does the closure of a set of attributes represent?
💡 Hint: Think about the function of dependencies.
Question 2
Easy
List the first step in the Chase Algorithm.
💡 Hint: What do we start with when computing A+?
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 does A+ represent?
- All attributes functionally determined from A
- Only attributes in a relation R
💡 Hint: Think about what closure means.
Question 2
True or False: The Chase Algorithm always leads to new attributes being added to A+.
- True
- False
💡 Hint: What happens when nothing else can be derived?
Solve and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Given functional dependencies F = {X→Y, Y→Z, Z→X, W→X} and starting with A = {W}, determine A+ and describe your steps clearly.
💡 Hint: Follow the dependencies closely and remember to add step by step.
Question 2
Construct a relation with three attributes A, B, C, and dependencies such that A and B can be a candidate key and show your closure A+ with at least three functional dependencies.
💡 Hint: Think creatively about relationships between attributes to form dependencies.
Challenge and get performance evaluation