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WGU D204 Questions and Answers with Verified Solutions | Latest 2026 Update

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WGU D204 Questions and Answers with Verified Solutions | Latest 2026 Update

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WGU D204 Questions and Answers with Verified Solutions | Latest
2026 Update




Q: What is the third phase in the Data Life Cycle

Answer:
Data cleaning phase

Q: Data cleaning phase: describe

Answer:
AKA: cleansing, wrangling, munging, feature engineering

Q: uses SQL, Python, R , or Excel to perform data modifications and
transformations

Answer:

,WGU D204 Questions and Answers with Verified Solutions | Latest
2026 Update




Q: Data cleaning phase: tools/techniques

Answer:
PYTHON
R
SQL
EXCEL

Q: data reduction: optimize storage capacity

Answer:
modification
transformation
anomaly detection

Q: Data cleaning phase: problems

Answer:
- some cleaning techniques could dramatically change
data/outcomes

, WGU D204 Questions and Answers with Verified Solutions | Latest
2026 Update




Q: outliers not dealt with can cause problems with stats models

Answer:


Q: What is the fourth phase in the Data Life Cycle

Answer:
data exploration

Q: Data exploration: describe

Answer:
begins to understand basic nature of the data, relationships
within it, structure of the data set and presence of outliers and the distribution of the
data

Q: uses data visualization tools and numerical summaries

Answer:

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