GATE 2014 CS (CS2) – Question 31
Find the maximum number of superkeys of R(E,F,G,H) with E as the key.
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Correct answer: 8 to 8
Explanation
Every set containing E is a superkey. Each of the remaining F,G,H may independently be included or omitted, giving2³=**8**. The intended statement takes E as the only candidate key; allowing additional keys can increase the total beyond8.