D497 DTMG 3221 Data Wrangling FA REVIEW QUESTIONS & ANSWERS

D497 DTMG 3221 Data Wrangling FA REVIEW QUESTIONS & ANSWERS
1. Which of the following describes the process of normalizing
data?
 a) Aggregating multiple data sources
 b) Structuring data into a standard format
 c) Removing duplicates
 d) Applying machine learning algorithms
 ANS: b) Structuring data into a standard format
2. Which library is primarily used for data wrangling in Python?
 a) NumPy
 b) Matplotlib
 c) Pandas
 d) Scikit-learn
 ANS: c) Pandas
3. What is the main purpose of data transformation in the ETL
process?
 a) Extracting data from different sources
 b) Loading data into a data warehouse