WGU D467 EXPLORING DATA OA EXAM ACTUAL EXAM
WITH COMPLETE QUESTIONS AND DETAILED ANSWERS
2026/2027 | GRADED A+ | BRAND NEW!
A data professional makes a change to a file. Then, they ask a
colleague to evaluate the change to identify any potential issues.
What does this scenario describe?
Code review
A team is tasked with determining how many customers have
made a purchase in the past month. Using a pivot table in
Google Sheets, what function will total the number of nonempty
sales in the purchase_date column of its customer database?
CountA
An analyst needs to show the geographic distribution of
customers in the United States by region. Which visual
representation should this analyst use?
Charts
An analyst used a column of a table to uniquely identify each
record within a table. Which tool did they use?
,Primary key
Which tool is used by data analysts to store and organize data,
making it easier for them to manage and access information?
Database
What is an example of conceptual data modeling that an analyst
uses?
Defining the business requirements for a new database
What leads to confirmation bias in data collection?
People search to verify preexisting beliefs.
Before analysis, a company collects data from countries that use
different date formats. Which of the following actions would
improve the data integrity?
,Change all of the dates to the same format
Which type of structured data does an analyst use?
Store inventory
If you have to complete your analysis with insufficient data, how
should you address this limitation?
Identify trends with the available data
A data analyst wants to find out how many middle school
students in Helsinki have laptops. It is unlikely that they can
survey every middle schooler in the city. Instead, they survey
enough students to represent all middle schoolers. This describes
what data analytics concept?
Using a sample
How does an analyst ensure that a data source is reliable?
It is accurate, complete, and unbiased information.
, How does an analyst apply the principle of consent to ethics and
privacy in data collection?
By disclosing how and why the data will be used before the
survey
What should an analyst consider at the start of data collection to
reduce errors?
Bias and fairness
A data analyst knows there are some nulls in their database
table. They want to save time when making calculations by
excluding these nulls. Which SQL function syntax can they use
in their query to return non-null values for one or more fields?
COALESCE (product, product_code)
A data analyst discovers that their database has recognized
product price data as text strings. What SQL function can the
analyst use to convert the text strings to floats?
WITH COMPLETE QUESTIONS AND DETAILED ANSWERS
2026/2027 | GRADED A+ | BRAND NEW!
A data professional makes a change to a file. Then, they ask a
colleague to evaluate the change to identify any potential issues.
What does this scenario describe?
Code review
A team is tasked with determining how many customers have
made a purchase in the past month. Using a pivot table in
Google Sheets, what function will total the number of nonempty
sales in the purchase_date column of its customer database?
CountA
An analyst needs to show the geographic distribution of
customers in the United States by region. Which visual
representation should this analyst use?
Charts
An analyst used a column of a table to uniquely identify each
record within a table. Which tool did they use?
,Primary key
Which tool is used by data analysts to store and organize data,
making it easier for them to manage and access information?
Database
What is an example of conceptual data modeling that an analyst
uses?
Defining the business requirements for a new database
What leads to confirmation bias in data collection?
People search to verify preexisting beliefs.
Before analysis, a company collects data from countries that use
different date formats. Which of the following actions would
improve the data integrity?
,Change all of the dates to the same format
Which type of structured data does an analyst use?
Store inventory
If you have to complete your analysis with insufficient data, how
should you address this limitation?
Identify trends with the available data
A data analyst wants to find out how many middle school
students in Helsinki have laptops. It is unlikely that they can
survey every middle schooler in the city. Instead, they survey
enough students to represent all middle schoolers. This describes
what data analytics concept?
Using a sample
How does an analyst ensure that a data source is reliable?
It is accurate, complete, and unbiased information.
, How does an analyst apply the principle of consent to ethics and
privacy in data collection?
By disclosing how and why the data will be used before the
survey
What should an analyst consider at the start of data collection to
reduce errors?
Bias and fairness
A data analyst knows there are some nulls in their database
table. They want to save time when making calculations by
excluding these nulls. Which SQL function syntax can they use
in their query to return non-null values for one or more fields?
COALESCE (product, product_code)
A data analyst discovers that their database has recognized
product price data as text strings. What SQL function can the
analyst use to convert the text strings to floats?
