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DA0-002 · Question #45
DA0-002 Question #45: Real Exam Question with Answer & Explanation
The correct answer is A: Append. To add new classification codes to existing historical data, the append operation is the most suitable technique, as it involves adding new attributes or records to the dataset.
Data Acquisition and Preparation
Question
Due to new reporting requirements, a data analyst must add new classification codes to historical data. Which of the following is the best technique for this task?
Options
- AAppend
- BBinning
- CParsing
- DUnion
Explanation
To add new classification codes to existing historical data, the append operation is the most suitable technique, as it involves adding new attributes or records to the dataset.
Common mistakes.
- B. Binning is the process of grouping continuous data into discrete categories or "bins," which is a data transformation technique, not for adding new classification codes.
- C. Parsing is the process of analyzing a string of symbols, often to extract specific data elements, but it's not the primary technique for adding new classification codes to data.
- D. Union combines the rows of two or more tables with compatible column structures, which is for combining datasets, not adding new classification codes to existing data.
Concept tested. Data manipulation - Appending data
Topics
#Data preparation#Data modification#Append operation#Historical data management
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