ITPEC FE Morning October 2018 Question 31
As an example of the use of big data, which of the following is a process that uses statistical or other methods to obtain new knowledge (such as trends and patterns) from a large amount of data?
Explanation
Data mining — analysing large volumes of data with statistics and similar methods to discover trends and patterns no one specified in advance.
Data mining looks for relationships hidden in the data, such as products bought together, customer groups that behave alike, or signs that predict churn. It uses techniques like association analysis, clustering, classification and regression, and is often run on data gathered in a data warehouse.
Answer (b)
Why not others:
- •(a) Data dictionary — a catalogue of the names, types and meanings of the data items in a system; it documents data rather than analysing it
- •(c) Data warehouse — the store of integrated, historical data used for analysis, not the analysis process itself
- •(d) Metadata — data that describes other data, such as a column's type or a file's creation date
Key rule: A data warehouse stores data for analysis, data mining discovers knowledge in it, and a data dictionary and metadata describe it.
System Strategy · AI-written, may contain errors
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