Question

Why is accessing data by predicate considered challenging in HDT-FoQ?

a.

The elements of Sp are sorted by predicate.

b.

Predicate-based retrieval is not supported in HDT-FoQ.

c.

Accessing data by predicate requires a full scan of Sp.

d.

All data retrieval in HDT-FoQ is equally efficient.

Posted under Big Data Computing

Answer: (c).Accessing data by predicate requires a full scan of Sp. Explanation:Accessing data by predicate in HDT-FoQ is considered challenging because the elements of Sp are sorted by subject, and locating all predicate occurrences demands a full scan of this sequence.

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