CompTIA DA0-001 CompTIA Data+ Certification Online Training
CompTIA DA0-001 Online Training
The questions for DA0-001 were last updated at Jan 29,2025.
- Exam Code: DA0-001
- Exam Name: CompTIA Data+ Certification
- Certification Provider: CompTIA
- Latest update: Jan 29,2025
A data analyst wants to create "Income Categories" that would be calculated based on the existing variable "Income".
The "Income Categories" would be as follows:
Income category 1: less than $1.
Income category 2: more than $1 and less than $20,000.
Income category 3: more than $20,001 and less than $40,000.
Income category 4: more than $40,001.
Which of the following data manipulation techniques should the data analyst use to create "Income Categories"?
- A . Data merge
- B . Derived variables
- C . Data blending
- D . Data append
Angela is aggregating data from CRM system with data from an employee system.
While performing an initial quality check, she realizes that her employee ID is not associated with her identifier in the CRM system.
What kind of issues is Angela facing? Choose the best answer.
- A . ETL process.
- B . Record linkage.
- C . ELT process.
- D . System integration.
Andy is a pricing analyst for a retailer. Using a hypothesis test, he wants to assess whether people who receive electronic coupons spend more on average.
What should Andy’s null hypothesis be?
- A . People who receive electronic coupons spend more on average.
- B . People who receive electronic coupons spend less on average.
- C . People who receive electronic coupons do not spend more on average.
- D . People who do not receive electronic coupons spend more on average.
Amanda needs to create a dashboard that will draw information from many other data sources and present it to business leaders.
Which one of the following tools is least likely to meet her needs?
- A . QuickSight.
- B . Tableau.
- C . Power BI.
- D . SPSS Modeler.
Daniel is using the structured Query language to work with data stored in relational database.
He would like to add several new rows to a database table.
What command should he use?
- A . SELECT.
- B . ALTER.
- C . INSERT.
- D . UPDATE.
Jhon is working on an ELT process that sources data from six different source systems.
Looking at the source data, he finds that data about the sample people exists in two of six systems.
What does he have to make sure he checks for in his ELT process? Choose the best answer.
- A . Duplicate Data.
- B . Redundant Data.
- C . Invalid Data.
- D . Missing Data.
Samantha needs to share a list of her organization’s top 50 customers with the VP of sales. She would like to include the name of the customer, the business they represent, their contact information, and their total sales over the past year.
The VP does not have any specialized analytics skills or software but would like to make some personal notes on the dataset.
What would be the best tool for Samantha to use to share this information?
- A . Power BI.
- B . Microsoft Excel.
- C . Minitab.
- D . SAS.
Alex wants to use data from his corporate sale, CRM, and shipping systems to try and predict future sales.
Which of the following systems is the most appropriate? Choose the best answer.
- A . Data mart.
- B . OLAP.
- C . Data Warehouse.
- D . OLTP.
Which one of the following is a measure of dispersion?
- A . Variance.
- B . Mode.
- C . Median.
- D . Mean.
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