WGU D491 PRACTICE EXAMINATION 2026
QUESTIONS WITH ANSWERS GRADED A+
◍ Project Manager.
Answer: Leads day-to-day operations and bridges team and stakeholders.
◍ Prescriptive Analytics.
Answer: Recommend the best course of action.
◍ Exploratory Analytics.
Answer: Discover patterns without a set question
◍ Which phase is the immediate predecessor to the operationalize phase of the
data analytics life cycle?Communicate resultsModel buildingModel
planningData preparation.
Answer: Communicate results
◍ Which activity is performed during the model planning phase of a data
analysis project?Building the final predictive modelSelecting relevant
features for modelingGenerating synthetic data for model
trainingConducting hypothesis testing on the modeling data.
Answer: Selecting relevant features for modeling
◍ Which data visualization is most suitable for understanding the trend and
progression of a variable over time in the data preparation
phase?HistogramsScatter plotsBox plotsLine charts.
Answer: Line charts
◍ Data Scientist.
Answer: An expert who develops models and analyzes data.
◍ Textual.
Answer: Reviews, feedback
,◍ Which testing procedure is used for evaluating the performance of a model
in the data analytics life cycle?Descriptive analysisFeature
selectionCross-validationData preprocessing.
Answer: Cross-validation
◍ Out-of-bounds operation.
Answer: An operation that exceeds the defined limits of a model or system.
◍ Which classification model is based on the concept of probability and
assigns class labels to instances based on the possibility of belonging to a
particular class?Naive BayesSupport vector machines (SVM)Decision
treeRandom forest.
Answer: Naive Bayes
◍ Which role in a data analytics project helps data scientists shape data for
analysis?Project sponsorData engineerBusiness intelligence analystDatabase
administrator.
Answer: Data engineer
◍ Model accuracy monitoring.
Answer: The ongoing assessment of a model's performance over time.
◍ Time-Series.
Answer: Sales over time
◍ ROI.
Answer: Profitability of an investment.
◍ Pilot project.
Answer: A small-scale preliminary study conducted to test feasibility and
design.
◍ Surveys.
Answer: Collect structured responses.
◍ An energy company wants to predict future energy demand to optimize
production. The company has an extensive data set on historical energy
usage. Which data analytic technique is best suited for this scenario?Time
, seriesPrincipal component analysisMultiple regressionLogistic regression.
Answer: Time series
◍ A data analyst working for a retail company analyzes the purchasing
behavior of customers to identify patterns and recommend products. Which
data analytic technique is most appropriate for analyzing the transaction
data?Time series analysisAssociation rules analysisText analysisClustering
analysis.
Answer: Association rules analysis
◍ T-Test.
Answer: Compare means of two groups.
◍ Which role is responsible for project initiation and providing the
requirements for a project?Business intelligence analystProject
sponsorBusiness userData scientist.
Answer: Project sponsor
◍ Phase 3: Model Planning.
Answer: Purpose: Select best model(s) and plan analysis.
◍ How does the communication of results tie to the operationalize phase of
data analytics?It helps identify the relevant data sources.It enables the
development of a data model.It implements data-driven insights into
business functions.It ensures the accuracy of the data analysis..
Answer: It implements data-driven insights into business functions.
◍ Phase 5: Communicate Results.
Answer: Purpose: Share findings & insights with stakeholders.
◍ Decision Scientist.
Answer: Main Goal: Model decisions mathematically.
◍ Who offers suggestions on ideas to test as the team formulates hypotheses
during the discovery phase of a data analytics project?Data scientistsData
visualization specialistsProject managersMarketing experts.
Answer: Data scientists
QUESTIONS WITH ANSWERS GRADED A+
◍ Project Manager.
Answer: Leads day-to-day operations and bridges team and stakeholders.
◍ Prescriptive Analytics.
Answer: Recommend the best course of action.
◍ Exploratory Analytics.
Answer: Discover patterns without a set question
◍ Which phase is the immediate predecessor to the operationalize phase of the
data analytics life cycle?Communicate resultsModel buildingModel
planningData preparation.
Answer: Communicate results
◍ Which activity is performed during the model planning phase of a data
analysis project?Building the final predictive modelSelecting relevant
features for modelingGenerating synthetic data for model
trainingConducting hypothesis testing on the modeling data.
Answer: Selecting relevant features for modeling
◍ Which data visualization is most suitable for understanding the trend and
progression of a variable over time in the data preparation
phase?HistogramsScatter plotsBox plotsLine charts.
Answer: Line charts
◍ Data Scientist.
Answer: An expert who develops models and analyzes data.
◍ Textual.
Answer: Reviews, feedback
,◍ Which testing procedure is used for evaluating the performance of a model
in the data analytics life cycle?Descriptive analysisFeature
selectionCross-validationData preprocessing.
Answer: Cross-validation
◍ Out-of-bounds operation.
Answer: An operation that exceeds the defined limits of a model or system.
◍ Which classification model is based on the concept of probability and
assigns class labels to instances based on the possibility of belonging to a
particular class?Naive BayesSupport vector machines (SVM)Decision
treeRandom forest.
Answer: Naive Bayes
◍ Which role in a data analytics project helps data scientists shape data for
analysis?Project sponsorData engineerBusiness intelligence analystDatabase
administrator.
Answer: Data engineer
◍ Model accuracy monitoring.
Answer: The ongoing assessment of a model's performance over time.
◍ Time-Series.
Answer: Sales over time
◍ ROI.
Answer: Profitability of an investment.
◍ Pilot project.
Answer: A small-scale preliminary study conducted to test feasibility and
design.
◍ Surveys.
Answer: Collect structured responses.
◍ An energy company wants to predict future energy demand to optimize
production. The company has an extensive data set on historical energy
usage. Which data analytic technique is best suited for this scenario?Time
, seriesPrincipal component analysisMultiple regressionLogistic regression.
Answer: Time series
◍ A data analyst working for a retail company analyzes the purchasing
behavior of customers to identify patterns and recommend products. Which
data analytic technique is most appropriate for analyzing the transaction
data?Time series analysisAssociation rules analysisText analysisClustering
analysis.
Answer: Association rules analysis
◍ T-Test.
Answer: Compare means of two groups.
◍ Which role is responsible for project initiation and providing the
requirements for a project?Business intelligence analystProject
sponsorBusiness userData scientist.
Answer: Project sponsor
◍ Phase 3: Model Planning.
Answer: Purpose: Select best model(s) and plan analysis.
◍ How does the communication of results tie to the operationalize phase of
data analytics?It helps identify the relevant data sources.It enables the
development of a data model.It implements data-driven insights into
business functions.It ensures the accuracy of the data analysis..
Answer: It implements data-driven insights into business functions.
◍ Phase 5: Communicate Results.
Answer: Purpose: Share findings & insights with stakeholders.
◍ Decision Scientist.
Answer: Main Goal: Model decisions mathematically.
◍ Who offers suggestions on ideas to test as the team formulates hypotheses
during the discovery phase of a data analytics project?Data scientistsData
visualization specialistsProject managersMarketing experts.
Answer: Data scientists
