Page 1 of 59
WGU D204 EXAM OBJECTIVE ASSESSMENT EXAM ACTUAL
EXAM AND STUDY GUIDE COMPLETE 300 QUESTIONS AND
DETAILED SOLUTIONS LATEST 2024-2025
WGU D204 EXAM OBJECTIVE ASSESSMENT EXAM ACTUAL EXAM
What questions will data analytics consider improving 10% market share value to open new
store in a different location?
a. Get list of geographic areas
b. Reduce staff pay by 10%
c. Check compatible market value
d. None of the above
C Check compatible market value
A data set has K variables, and the classifying method has the following steps:
compare levels on nearby data, assign a new case to a category of nearby beta, locate the
case in a k-dimensional space, in which order should the steps be applied
a. Assign compare locate
b. Compare assign locate
c. Locate compare assign
d. Locate assign compare
c. Locate compare assign
In which phase of the data analytics life cycle does an analyst build a graph?
a.Data exploration
b.Discovery
c.Predictive modeling
d.Data acquisition
a.Data exploration
1
,Page 2 of 59
An analyst applies a statistical formula to obtain the average temperature for a city over the
last 20 years. Which phase of the data analytics life cycle is represented by this activity?
a.Discovery
b.Exploration
c.Modeling
d.Reporting
b.Exploration
An analyst has been asked to define variables in a dataset that may contain missing values.
Which activity of the analytics life cycle is represented?
a.Data collection
b.Data cleaning
c.Transforming improperly text
d.Disqualifying data sources
b.Data cleaning
Which activity does an analyst perform in the discovery phase of the data analytics life cycle?
a.Collecting data
b.Cleaning data
c.Identifying outliers
d.Defining business goals
d.Defining business goals
During which phase in the data analytics life cycle would a churn analysis be performed?
a.Data cleaning churn
b.Data acquisition
c.Predictive analysis
d.Representation and reporting
c.Predictive analysis
2
,Page 3 of 59
What might be developed by data analysts when acquiring data from a data warehouse?
a.The procedures for extracting files from the data warehouse
b.The procedures for updating tables in the data warehouse
c.Relational structures of tables
d.The SQL queries of data within the tables
d.The SQL queries of data within the tables
Which aspect of data exploration occurs when an analyst writes code to compile a bar graph
of dog food sales per month?
a. Performance of a correlation analysis
b. Analysis of data anomalies
c. Verification through visualization
d. Determination of variabilities
c. Verification through visualization
An oil company uses robots and sensors to detect how pipeline corrosion changes over time.
The collected data is then used in a predictive model that estimates when a pipe should be
replaced.
How does the predictive model serve this oil company?
a. To minimize interruptions from maintenance shutdowns
b. To minimize the need for workforce safety training
c. To improve compliance with pipeline construction standards
d. To improve compliance with pipeline disposal standards
a. To minimize interruptions from maintenance shutdowns
What is the necessary requirement when collecting data from different data sources
a.Data must be easy to understand
b.Data must have defined structure
c.Data must have great number of variable
d.Data must have features related to business goals
3
, Page 4 of 59
d.Data must have features related to business goals
Which mistake is commonly made during the predictive analytics phase?
a. The data are separated into different sets.
b. The variables are separated into response and independent variables.
c. The data are prepared before the model is developed.
d. The model is developed before the research question is known.
d. The model is developed before the research question is known.
Why might a data analyst resample a data set with replacement data in a data mining
project?
a.Misidentification of causation
b.Wrong variables chosen for analyzation
c.Too little data for training and testing data sets
d.Skewed data resulting from outliers
c.Too little data for training and testing data sets
Ex. The data team has processed the data and ... who will give the reports and explanation to
higher level?
a. Data Analyst
b. Data owner
c. Data researcher
d.None of the above
c. Data researcher
An analyst realizes that the data set has been reduced significantly, resulting in sample sizes
that are too small. In which phase of the data analytics life cycle did this likely occur?
a. Data exploration
b. Data modeling
4
WGU D204 EXAM OBJECTIVE ASSESSMENT EXAM ACTUAL
EXAM AND STUDY GUIDE COMPLETE 300 QUESTIONS AND
DETAILED SOLUTIONS LATEST 2024-2025
WGU D204 EXAM OBJECTIVE ASSESSMENT EXAM ACTUAL EXAM
What questions will data analytics consider improving 10% market share value to open new
store in a different location?
a. Get list of geographic areas
b. Reduce staff pay by 10%
c. Check compatible market value
d. None of the above
C Check compatible market value
A data set has K variables, and the classifying method has the following steps:
compare levels on nearby data, assign a new case to a category of nearby beta, locate the
case in a k-dimensional space, in which order should the steps be applied
a. Assign compare locate
b. Compare assign locate
c. Locate compare assign
d. Locate assign compare
c. Locate compare assign
In which phase of the data analytics life cycle does an analyst build a graph?
a.Data exploration
b.Discovery
c.Predictive modeling
d.Data acquisition
a.Data exploration
1
,Page 2 of 59
An analyst applies a statistical formula to obtain the average temperature for a city over the
last 20 years. Which phase of the data analytics life cycle is represented by this activity?
a.Discovery
b.Exploration
c.Modeling
d.Reporting
b.Exploration
An analyst has been asked to define variables in a dataset that may contain missing values.
Which activity of the analytics life cycle is represented?
a.Data collection
b.Data cleaning
c.Transforming improperly text
d.Disqualifying data sources
b.Data cleaning
Which activity does an analyst perform in the discovery phase of the data analytics life cycle?
a.Collecting data
b.Cleaning data
c.Identifying outliers
d.Defining business goals
d.Defining business goals
During which phase in the data analytics life cycle would a churn analysis be performed?
a.Data cleaning churn
b.Data acquisition
c.Predictive analysis
d.Representation and reporting
c.Predictive analysis
2
,Page 3 of 59
What might be developed by data analysts when acquiring data from a data warehouse?
a.The procedures for extracting files from the data warehouse
b.The procedures for updating tables in the data warehouse
c.Relational structures of tables
d.The SQL queries of data within the tables
d.The SQL queries of data within the tables
Which aspect of data exploration occurs when an analyst writes code to compile a bar graph
of dog food sales per month?
a. Performance of a correlation analysis
b. Analysis of data anomalies
c. Verification through visualization
d. Determination of variabilities
c. Verification through visualization
An oil company uses robots and sensors to detect how pipeline corrosion changes over time.
The collected data is then used in a predictive model that estimates when a pipe should be
replaced.
How does the predictive model serve this oil company?
a. To minimize interruptions from maintenance shutdowns
b. To minimize the need for workforce safety training
c. To improve compliance with pipeline construction standards
d. To improve compliance with pipeline disposal standards
a. To minimize interruptions from maintenance shutdowns
What is the necessary requirement when collecting data from different data sources
a.Data must be easy to understand
b.Data must have defined structure
c.Data must have great number of variable
d.Data must have features related to business goals
3
, Page 4 of 59
d.Data must have features related to business goals
Which mistake is commonly made during the predictive analytics phase?
a. The data are separated into different sets.
b. The variables are separated into response and independent variables.
c. The data are prepared before the model is developed.
d. The model is developed before the research question is known.
d. The model is developed before the research question is known.
Why might a data analyst resample a data set with replacement data in a data mining
project?
a.Misidentification of causation
b.Wrong variables chosen for analyzation
c.Too little data for training and testing data sets
d.Skewed data resulting from outliers
c.Too little data for training and testing data sets
Ex. The data team has processed the data and ... who will give the reports and explanation to
higher level?
a. Data Analyst
b. Data owner
c. Data researcher
d.None of the above
c. Data researcher
An analyst realizes that the data set has been reduced significantly, resulting in sample sizes
that are too small. In which phase of the data analytics life cycle did this likely occur?
a. Data exploration
b. Data modeling
4
