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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
Define functional dependency in your own words.
💡 Hint: Consider how you can derive one attribute knowing another.
Question 2
Easy
What does the closure of a set of functional dependencies represent?
💡 Hint: Think about what it means to infer new information.
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 F+ represent?
- All functional dependencies in F only
- All functional dependencies derivable from F
- Only trivial dependencies
💡 Hint: Consider what you can deduce from F.
Question 2
True or False: A functional dependency A → B is trivial if B is a subset of A.
- True
- False
💡 Hint: Think about what 'subset' means in this context.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Given F = {X → Y, Y → Z}, compute the closure of {X, W} and explain each step involved.
💡 Hint: Follow through each dependency and state why it was added.
Question 2
If the set A = {X, Y} and F = {X → Z, Y → Z}, what can be said about F+? Identify candidate keys based on your findings.
💡 Hint: Consider which attributes fully determine the relation when assessing keys.
Challenge and get performance evaluation