WGU D204 OBJECTIVE ASSESSMENT
Questions and Answers
1. Which activity does an analyst perform in the discovery
phase of the data analytics life cycle >>> identifying business
needs
2. In which phase of the data analytics life cycle does the
analyst build a histogram >>> data exploration
3. An analyst applies a statistical formula to obtain the
average temperature for a city over the last 50 years. Which
phase of the data analytics life cycle is represented by this
activity >>> exploratory data analysis
4. An analyst has been tasked with defining data columns
that could contain null values. Which activity of the data
acquisitions phase is represented >>> - detecting missing
values
1/5
,5. Which activity in the data analytics life cycle occurs
during the data acquisition phase and requires the most
time and effort from the data an- alyst >>> cleaning data
6. What might be developed by data analysts when acquiring
data from a data warehouse >>> the SQL queries of data
within the tables
7. What can be identified using a box plot >>> interquartile
range
8. What will be the consequence of poor attention to detail
during the data exploration phase >>> The analyst will lack
insight into the structure of the data set
9. Which aspect of data exploration occurs when an
analyst writes code to compile a bar graph of dog food
sales per month >>> verification through visualization
10. An oil company uses robots and sensors to detect how
2/5
,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 >>> to minimize interruptions from maintenance
shutdowns
11. During which phase in the data analytics life cycle would a
churn analysis be performed >>> predictive analysis
12. Which mistake is commonly made during the
predictive analytics phase >>> The model is developed
before the research question is known
13. Why might a data analyst resample a data set with
replacement data in a data mining project >>> too little data
for training and testing tool sets
14. A data analyst has identified combinations of sales
tr>>>actions that frequently occur together in data over the
past 5 years. Which phase of the data analytics life cycle is
represented by this analysis >>> data mining
3/5
,15. What strategy will contribute to effective data
representation and report- ing >>> excluding unrelated data
16. What are two purposes of the reporting phase of the data
analytics life cycle >>> provide conclusions; provide
actionable insights
17. During which phase of the data analytics life cycle does an
analyst create a story to report data >>> data reporting
18. 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 >>> data mining
19. What is a common duty of a database administrator >>>
maintain data on the IT infrastructure
20. What is an example of an external stakeholder for a data
analytics pro- ject >>> regulatory body
4/5
, 21. Which party has the primary vision for a data analytics
project and brings resources to complete it >>> project
sponsors
22. What does the critical path represent in data analytics
project manage- ment >>> Minimum time to complete
dependent tasks
23. A data analytics project manager has been asked to
complete a project on a very short timeline. Which action is
likely to yield positive results >>> Expand the team with
experienced staff
24. Which type of project management problem occurs when a
data mining task has started but a data acquisition task has
not been completed >>> sched- ule
25. How can an organization improve inter-professional
communication among team members >>> By using tools that
5/5
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