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What are the special features of the CompTIA DA0-001 Exam
The CompTIA Data+ certification is an important one, because it's the first of its kind. It was developed to ensure that IT professionals had the necessary skills to work with data and perform advanced analysis.
The CompTIA Data+ certification is also unique in that it can be applied across several different industries. In fact, the curriculum for this exam focuses on three different areas: data analysis, communication and technology. This means that you'll need a strong understanding of all three areas to qualify for this exam. CompTIA DA0-001 exam dumps are the best way to make you perp fast.
The CompTIA Data+ certification is designed for those who have already gained experience working with data or those who want to learn more about it. The test consists of a series of questions designed to measure your knowledge about various aspects of data analysis.
For more info read reference:
CompTIA DA0-001 Exam Reference
NEW QUESTION 58
Which action is mandated by the Gramm-Leach-Bliley Act (GLBA) Safeguards Rule?
- A. The provision of a privacy notice to consumers.
- B. The distinguishing between consumers and customers.
- C. The disclosure of information sharing practices.
- D. The development of written information security policy.
Answer: D
NEW QUESTION 59
A data analyst has been asked to merge the tables below, first performing an INNER JOIN and then a LEFT JOIN:
Customer Table -
In-store Transactions -
Which of the following describes the number of rows of data that can be expected after performing both joins in the order stated, considering the customer table as the main table?
- A. INNER: 6 rows; LEFT: 9 rows
- B. INNER: 15 rows; LEFT: 9 rows
- C. INNER: 9 rows; LEFT: 15 rows
- D. INNER: 9 rows; LEFT: 6 rows
Answer: B
NEW QUESTION 60
What test formatting option indicates that a field is required in an entity relationship diagram?
- A. Italicization.
- B. Boldfacing.
- C. Underlining.
- D. Capitalization.
Answer: B
NEW QUESTION 61
Which dimension of data quality ensures that data stored in multiple locations is the same?
- A. Validity.
- B. Completeness.
- C. Consistency.
- D. Accuracy.
Answer: C
Explanation:
Data consistency means that each user sees a consistent view of the data, including visible changes made by the user's own transactions and transactions of other users.
NEW QUESTION 62
Which of the following entities would NOT be regulated by the Health Insurance Portability and Accountability Act (HIPAA)?
- A. A health insurance company.
- B. A health information clearinghouse.
- C. A healthcare provider.
- D. A health and fitness mobile app.
Answer: D
NEW QUESTION 63
Which of the following can be used to translate data into another form so it can only be read by a user who has a key or a password?
- A. Data masking.
- B. Data encryption.
- C. Data protection.
- D. Data transmission.
Answer: B
Explanation:
Data encryption is a way of translating data from plaintext (unencrypted) to ciphertext (encrypted). Users can access encrypted data with an encryption key and decrypted data with a decryption key.
NEW QUESTION 64
When analyzing the values of two variables, you decide to convert both variables so they are on a scale of 0 to 1.
What term describes this action?
- A. Filtering.
- B. Aggregation.
- C. Normalization.
- D. Transposition.
Answer: C
Explanation:
Normalization is the process of reorganizing data in a database so that it meets two basic requirements: There is no redundancy of data, all data is stored in only one place. Data dependencies are logical, all related data items are stored together.
Put simply, data normalization ensures that your data looks, reads, and can be utilized the same way across all of the records in your customer database. This is done by standardizing the formats of specific fields and records within your customer database.
NEW QUESTION 65
Q3 2020 has just ended, and now a data analyst needs to create an ad-hoc sales report that demonstrates how well the Q3 2020 promotion went versus last year's Q3 promotion.
Which of the following date parameters should the analyst use?
- A. Q3 2019 vs. Q3 2020
- B. Q4 2019 vs. Q3 2020
- C. 2019 vs. YTD 2020
- D. YTD 2019 vs. YTD 2020
Answer: A
NEW QUESTION 66
What is the maximum number of values that may be assigned to a single key in a key/value store?
- A. 0
- B. 1
- C. 2
- D. No maximum
Answer: D
NEW QUESTION 67
A sales team wants visibility of current sales numbers, pipeline, and team performance. The team would also like to see calculations of individuals' earned commissions and projected commissions based on sales, but they want that information to be kept confidential. Which of the following would be the BEST way to provide this visibility?
- A. Create a dashboard displaying a data refresh date so users know the current sales numbers and configure permissions to control access.
- B. Create a dashboard with filters for the overall team, individuals, and management. Users can filter to see the data they want.
- C. Create a dashboard for sales numbers, pipeline, and team and individual performance for the management team.
- D. Create a dashboard with views for team, individuals, and management. Configure permissions to control access.
Answer: C
NEW QUESTION 68
When analyzing the values of two variables, you decide to convert both variables so they are on a scale of 0 to 1.
What term describes this action?
- A. Filtering.
- B. Aggregation.
- C. Normalization.
- D. Transposition.
Answer: C
Explanation:
Normalization is the process of reorganizing data in a database so that it meets two basic requirements: There is no redundancy of data, all data is stored in only one place. Data dependencies are logical, all related data items are stored together.
Put simply, data normalization ensures that your data looks, reads, and can be utilized the same way across all of the records in your customer database. This is done by standardizing the formats of specific fields and records within your customer database.
NEW QUESTION 69
Which of the following is the correct data type for text?
- A. Float
- B. String
- C. Boolean
- D. Integer
Answer: B
NEW QUESTION 70
The ACME Corporation hired an analyst to detect data quality issues in their excel documents. Which of the following are the most common issues? (Select TWO)
- A. Symbols.
- B. Duplicates.
- C. Misspellings.
- D. Commas.
- E. Apostrophe.
Answer: B,C
Explanation:
1. Duplicates
2. Misspellings
The most common data quality issues are difficult to resolve in Excel because of their rigidity. It forces analysts to do a ton of manual work, which results in a high probability of an error being introduced to the data set. Those common issues include:
- Blanks
- Nulls
- Outliers
- Duplicates
- Extra spaces
- Misspellings
- Abbreviations and domain-specific variations
- Formula error codes
When introduced, these errors can skew or even invalidate the resulting analysis. A smart tool would minimize the possibility of error by automating the manual work. In Excel, you might look for data quality issues in one of two ways. First, you might use auto filters on specific columns to scan for anomalies and blanks or you might use a pivot table to find gaps and discrepancies.
In either case, you're scanning for the anomalies yourself. Suffice it to say that's not a very efficient process. It also means accuracy is only as good as the analyst's eye, so the probability of error varies throughout the day.
NEW QUESTION 71
What term indicates whether an attribute's value is within an expected range?
- A. Data processing.
- B. Data availability.
- C. Data validity.
- D. Data integrity.
Answer: C
Explanation:
Data validation means checking the accuracy and quality of source data before using, importing or otherwise processing data. Different types of validation can be performed depending on destination constraints or objectives. Data validation is a form of data cleansing.
NEW QUESTION 72
Which of the following is an example of a at flat file?
- A. CSV file
- B. JSON file
- C. PDF file
- D. JPEG file
Answer: D
NEW QUESTION 73
You are looking at a dashboard is sales by a US state and would like to see the sales for individual counties within a specific state What action should you take?
- A. Roll up.
- B. Drill down.
- C. Deviate.
- D. Aggregate.
Answer: B
NEW QUESTION 74
What effort has the goal of maintaining a single source of truth for the most important data elements handled by the organization?
- A. MAM (Mobile Application Management)
- B. IPS (Intrusion Prevention System)
- C. MDM (Master Data Management)
- D. DLP (Data Loss Prevention)
Answer: C
Explanation:
Master data management (MDM) involves creating a single master record for each person, place, or thing in a business, from across internal and external data sources and applications. This information has been de-duplicated, reconciled and enriched, becoming a consistent, reliable source. Once created, this master data serves as a trusted view of business-critical data that can be managed and shared across the business to promote accurate reporting, reduce data errors, remove redundancy, and help workers make better-informed business decisions.
NEW QUESTION 75
Which of the following is a characteristic of a relational database?
- A. It uses minimal memory.
- B. It utilizes key-value pairs.
- C. It is structured in nature.
- D. It has undefined fields.
Answer: C
NEW QUESTION 76
Chris is building a database to store prices for items on a restaurant menu.
What data type is most appropriate for this field?
- A. Numeric.
- B. Tags.
- C. Alphanumeric.
- D. Date.
Answer: A
Explanation:
Prices are numbers stored in dollars and cents; as such, the data type needs to be capable of storing numbers.
NEW QUESTION 77
Andrew conducts a study and wants to capture eye color.
What kind of data is eye color?
Choose the best response.
- A. Continuous.
- B. Categorical.
- C. Discrete.
- D. Alphanumeric.
Answer: B
Explanation:
Correct answer B. Categorical.
Eye color can only fall into a certain range of values; as such, it is categorical.
NEW QUESTION 78
The sales grocery store had an average of $8000 per day. The store introduced several advertising campaigns in order to increase sales. To determine whether the advertising campaigns have been effective in increasing sales, a sample of 64 days of sales was selected, and the sample mean was $8000 per day.
The correct null and alternative hypotheses to test whether there has been a significant increase are
- A. Null Population mean is $8000; Alternative; Population mean is greater than or equal to $8000.
- B. Null Sample mean is $8000; Alternative Sample mean is greater than or equal to $8000.
- C. Null Sample mean is $8000; Alternative Sample mean is greater than $8000.
- D. Null Population mean is $8000; Alternative; Population mean is greater than $8000.
Answer: D
Explanation:
Since you are trying to determine whether sales increased above the current average of $8000, the population mean for the null hypothesis is $8000; whereas the mean for the alternative hypothesis is greater than $8000. Hypotheses are always stated in terms of population you are working with, ruling out options A and B.
The test is whether sales are higher than the average of $8000 per day, which rules out option C.
NEW QUESTION 79
An analyst is designing a dashboard to determine which site has the highest percentage of new customers. The analyst must choose an appropriate chart to include in the dashboard. The following data is available:
Which of the following types of charts should be considered to BEST display the data?
- A. Include a bar chart using the site and the percentage of new customers data.
- B. Include a pie chat using the site and percentage of new customers data.
- C. Include a line chart using the site and the percentage of new customers data.
- D. Include a scatter chart using the site and the percent of new customers data.
Answer: A
NEW QUESTION 80
Which of the following contains alphanumeric values?
- A. A3J7
- B. 0
- C. 10.1E²
- D. 13.6
Answer: A
NEW QUESTION 81
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