The latest CompTIA Data+ DA0-001 certification actual real practice exam question and answer (Q&A) dumps are available free, which are helpful for you to pass the CompTIA Data+ DA0-001 exam and earn CompTIA Data+ DA0-001 certification.
Table of Contents
- DA0-001 Question 1
- Exam Question
- Correct Answer
- Explanation
- DA0-001 Question 2
- Exam Question
- Correct Answer
- Explanation
- DA0-001 Question 3
- Exam Question
- Correct Answer
- Explanation
- DA0-001 Question 4
- Exam Question
- Correct Answer
- DA0-001 Question 5
- Exam Question
- Correct Answer
- Explanation
- DA0-001 Question 6
- Exam Question
- Correct Answer
- DA0-001 Question 7
- Exam Question
- Correct Answer
- DA0-001 Question 8
- Exam Question
- Correct Answer
- DA0-001 Question 9
- Exam Question
- Correct Answer
- DA0-001 Question 10
- Exam Question
- Correct Answer
- Explanation
DA0-001 Question 1
Exam Question
A data scientist wants to see which products make the most money and which products attract the most customer purchasing interest in their company.
Which of the following data manipulation techniques would he use to obtain this information?
A. Data append
B. Data blending
C. Normalize data
D. Data merge
Correct Answer
B. Data blending
Explanation
Data blending is combining multiple data sources to create a single, new dataset, which can be presented visually in a dashboard or other visualization and can then be processed or analyzed.
Enterprises get their data from a variety of sources, and users may want to temporarily bring together different datasets to compare data relationships or answer a specific question. Data append is incorrect. Data append is a process that involves adding new data elements to an existing database.
An example of a common data append would be the enhancement of a company’s customer files. A data append takes the information they have, matches it against a larger database of business data, allowing the desired missing data fields to be added. Normalize data is incorrect. Data normalization is the process of structuring your relational customer database, following a series of normal forms. This improves the accuracy and integrity of your data while ensuring that your database is easier to navigate. Data merge is incorrect. Data merging is the process of combining two or more data sets into a single data set.
DA0-001 Question 2
Exam Question
Which one of the following is a common data warehouse schema?
A. Snowflake.
B. Square.
C. Spiral.
D. Sphere.
Correct Answer
A. Snowflake.
Explanation
Snowflake enables data storage, processing, and analytic solutions that are faster, easier to use, and far more flexible than traditional offerings. The Snowflake data platform is not built on any existing database technology or “big data” software platforms such as Hadoop.
DA0-001 Question 3
Exam Question
You are working with a professional statistician to perform an analysis and would like to use a statistics package.
Which one of the following would be the most appropriate?
A. Rapid Miner.
B. QLIK.
C. Power BI.
D. Minitab.
Correct Answer
D. Minitab.
Explanation
Minitab is statistical analysis software. It can be used for learning about statistics as well as statistical research. Statistical analysis computer applications have the advantage of being accurate, reliable, and generally faster than computing statistics and drawing graphs by hand.
DA0-001 Question 4
Exam Question
In a tabular dataset, what term is used to describe the data that appears in a single row?
A. Attribute.
B. Records.
C. Field.
D. Table.
Correct Answer
B. Records.
DA0-001 Question 5
Exam Question
You have a database where queries are performing slowly.
Investigating the results, you find that the database is performing a time-consuming table scan.
What action can best improve the query performance?
A. Sub setting the records.
B. Parameterizing the query.
C. Recompiling the query.
D. Adding an index.
Correct Answer
D. Adding an index.
Explanation
You create an index to optimize performance when searching the table using the Find function and to establish uniqueness of table columns. Indexing makes columns faster to query by creating pointers to where data is stored within a database. Imagine you want to find a piece of information that is within a large database. To get this information out of the database the computer will look through every row until it finds it.
DA0-001 Question 6
Exam Question
Which of the following contains alphanumeric values?
A. 10.1²
B. 13.6
C. 1347
D. A3J7
Correct Answer
D. A3J7
DA0-001 Question 7
Exam Question
What’s the minimum passing score on the Data+ exam?
A. 700
B. 650
C. 750
D. 675
Correct Answer
D. 675
DA0-001 Question 8
Exam Question
What is the maximum number of values that may be assigned to a single key in a key/value store?
A. 3
B. 1
C. 2
D. No maximum
Correct Answer
D. No maximum
DA0-001 Question 9
Exam Question
What would be an example of an acceptable form of primary identification for the Data+ exam?
A. Passport.
B. School ID card.
C. Employee ID card.
D. Credit card with photo and signature.
Correct Answer
A. Passport.
DA0-001 Question 10
Exam Question
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.
Correct Answer
B. Record linkage.
Explanation
While this scenario describes a system integration challenge that can be solved with ETL or ELT, Angela is facing a Record linkage issue.