WGU D204 EXAM 2026 QUESTIONS AND ANSWERS ALREADY GRADED A+. 100% VERIFIED SOLUTIONS |
UPDATED PER LATEST GUIDELINES | GRADED A+...
Question 1
A business analyst wants to understand what happened to sales last quarter by reviewing historical reports.
Which type of analytics is most appropriate?
A. Predictive analytics
B. Prescriptive analytics
C. Descriptive analytics
D. Diagnostic analytics
🟢 Correct Answer:
C. Descriptive analytics
🔴 RATIONALE:
Descriptive analytics summarizes historical data to explain what happened. It uses dashboards, reports, and
basic statistics to describe past performance.
Question 2
Which phase of the CRISP-DM process focuses on defining the business problem and project objectives?
A. Business understanding
B. Data preparation
C. Modeling
D. Evaluation
,🟢 Correct Answer:
A. Business understanding
🔴 RATIONALE:
CRISP-DM begins with business understanding, where analysts clarify objectives, requirements, and success
criteria before working with data.
Question 3
Which of the following best describes a data lake?
A. A highly structured repository of aggregated data for reporting
B. A system for transaction processing
C. A large repository that stores raw data in native formats
D. A tool for visualizing key performance indicators
🟢 Correct Answer:
C. A large repository that stores raw data in native formats
🔴 RATIONALE:
A data lake stores raw data at scale in its original format, allowing flexible analysis. A data warehouse is
structured; transaction systems support OLTP.
,Question 4
What is the primary purpose of data governance?
A. To eliminate all data
B. To ensure data is managed as a valuable organizational asset with defined policies and accountability
C. To speed up data entry
D. To replace data warehousing
🟢 Correct Answer:
B. To ensure data is managed as a valuable organizational asset with defined policies and accountability
🔴 RATIONALE:
Data governance establishes policies, roles, and processes to ensure data quality, security, compliance, and
effective use across an organization.
Question 5
In SQL, which clause is used to filter rows before grouping?
A. HAVING
B. SELECT
C. WHERE
D. ORDER BY
🟢 Correct Answer:
C. WHERE
, 🔴 RATIONALE:
The WHERE clause filters individual rows before aggregation. HAVING filters after grouping with GROUP BY.
Question 6
Which of the following is a measure of data quality that refers to data being close to the true value?
A. Accuracy
B. Timeliness
C. Completeness
D. Consistency
🟢 Correct Answer:
A. Accuracy
🔴 RATIONALE:
Accuracy measures whether data reflects the real-world value. Timeliness is freshness, completeness is no
missing values, and consistency is uniform representation.
Question 7
A data analyst wants to examine the relationship between two continuous variables. Which visualization is most
appropriate?
A. Pie chart
B. Bar chart
UPDATED PER LATEST GUIDELINES | GRADED A+...
Question 1
A business analyst wants to understand what happened to sales last quarter by reviewing historical reports.
Which type of analytics is most appropriate?
A. Predictive analytics
B. Prescriptive analytics
C. Descriptive analytics
D. Diagnostic analytics
🟢 Correct Answer:
C. Descriptive analytics
🔴 RATIONALE:
Descriptive analytics summarizes historical data to explain what happened. It uses dashboards, reports, and
basic statistics to describe past performance.
Question 2
Which phase of the CRISP-DM process focuses on defining the business problem and project objectives?
A. Business understanding
B. Data preparation
C. Modeling
D. Evaluation
,🟢 Correct Answer:
A. Business understanding
🔴 RATIONALE:
CRISP-DM begins with business understanding, where analysts clarify objectives, requirements, and success
criteria before working with data.
Question 3
Which of the following best describes a data lake?
A. A highly structured repository of aggregated data for reporting
B. A system for transaction processing
C. A large repository that stores raw data in native formats
D. A tool for visualizing key performance indicators
🟢 Correct Answer:
C. A large repository that stores raw data in native formats
🔴 RATIONALE:
A data lake stores raw data at scale in its original format, allowing flexible analysis. A data warehouse is
structured; transaction systems support OLTP.
,Question 4
What is the primary purpose of data governance?
A. To eliminate all data
B. To ensure data is managed as a valuable organizational asset with defined policies and accountability
C. To speed up data entry
D. To replace data warehousing
🟢 Correct Answer:
B. To ensure data is managed as a valuable organizational asset with defined policies and accountability
🔴 RATIONALE:
Data governance establishes policies, roles, and processes to ensure data quality, security, compliance, and
effective use across an organization.
Question 5
In SQL, which clause is used to filter rows before grouping?
A. HAVING
B. SELECT
C. WHERE
D. ORDER BY
🟢 Correct Answer:
C. WHERE
, 🔴 RATIONALE:
The WHERE clause filters individual rows before aggregation. HAVING filters after grouping with GROUP BY.
Question 6
Which of the following is a measure of data quality that refers to data being close to the true value?
A. Accuracy
B. Timeliness
C. Completeness
D. Consistency
🟢 Correct Answer:
A. Accuracy
🔴 RATIONALE:
Accuracy measures whether data reflects the real-world value. Timeliness is freshness, completeness is no
missing values, and consistency is uniform representation.
Question 7
A data analyst wants to examine the relationship between two continuous variables. Which visualization is most
appropriate?
A. Pie chart
B. Bar chart
