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NEW QUESTION 75
According to the empirical rule, what percent of thee values in a sample fall within three standard deviations of the mean in a normal distribution?
- A. 99.70%
- B. 90%
- C. 68%
- D. 95%
Answer: A
Explanation:
According to the empirical rule, 68% of values are within one standard deviation, 95% are within two standard deviations, and 99.7% are within three standard deviations.
NEW QUESTION 76
What's the minimum passing score on the Data+ exam?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: D
NEW QUESTION 77
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. OLTP.
- C. OLAP.
- D. Data Warehouse.
Answer: D
Explanation:
Correct answer: C. Data Warehouse.
Data warehouse bring together data from multiple systems used by an organization.
A data mart is too narrow, as Alex needs data from across multiple divisions.
OLAP is a broad term of analytical processing, and OLTP systems are transactional and not ideal for this task.
NEW QUESTION 78
You are creating a dashboard that shows the total revenue for your organization broken out by a variety of factors. Which one of these is a measure, rather than a dimension?
- A. Department.
- B. Month.
- C. Geographic region.
- D. Revenue.
Answer: D
NEW QUESTION 79
Melissa wants to explore central tendency in her dataset.
Which statistic best matches her need?
- A. Standard deviation.
- B. Median.
- C. Range.
- D. Interquartile range.
Answer: B
Explanation:
Correct answer C. Median.
The Median is the middle observation of variable and is, therefore, a measure of central tendency.
Interquartile range is a measure of position.
Range and Standard deviation are both measures of dispersion.
NEW QUESTION 80
What analytics suite is offered by Microsoft and directly integrates with SQL Server Databases?
- A. Qlik.
- B. Power BI.
- C. Dataroma.
- D. Domo.
Answer: B
Explanation:
Power BI is a collection of software services, apps, and connectors that work together to turn your unrelated sources of data into coherent, visually immersive, and interactive insights. Your data may be an Excel spreadsheet, or a collection of cloud-based and on-premises hybrid data warehouses.
NEW QUESTION 81
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. 2019 vs. YTD 2020
- B. YTD 2019 vs. YTD 2020
- C. Q3 2019 vs. Q3 2020
- D. Q4 2019 vs. Q3 2020
Answer: C
NEW QUESTION 82
What cybersecurity goal protects an organization's data from unauthorized modification?
- A. Non-repudiation.
- B. Integrity.
- C. Confidentiality.
- D. Availability.
Answer: B
Explanation:
The term data integrity refers to the accuracy and consistency of data. When creating databases, attention needs to be given to data integrity and how to maintain it. A good database will enforce data integrity whenever possible. For example, a user could accidentally try to enter a phone number into a date field.
NEW QUESTION 83
Olivia has 15 people on her data analytics team. Her team's charter requires that all team members have read access to the finance, human resources, sales, and customer service areas of the corporate data warehouse.
What is the best way to provision access to her team?
Choose the best answer.
- A. Since there are 15 people on her team, create a role for each person to improve security.
- B. Since there are four discrete data subjects, create one role for each subject area.
- C. Enable multifactor authentication (MFA) to protect the data.
- D. Create a single role that includes finance, human resources, sales, and customer services data.
Answer: D
Explanation:
Correct answer D. Create a single role that includes finance, human resources, sales, and customer services data.
While MFA is a good security practice, it doesn't govern access to data.
Creating a single role for her team and assigning that role to the individuals on the team is the best approach.
NEW QUESTION 84
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 transmission.
- B. Data protection.
- C. Data encryption.
- D. Data masking.
Answer: C
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 85
Encryption is a mechanism for protecting data.
When should encryption be applied to data?
Choose the best answer.
- A. When data is at rest.
- B. When data is at rest, unless you are using local storage.
- C. When data is in transit.
- D. When data is at rest or in transit.
Answer: D
Explanation:
Correct answer B. When data is at rest or in transit.
To provide maximum protection, encrypt data both in transit and at rest.
NEW QUESTION 86
Which of the following describes a programming language and free software environment for statistical computing and graphics?
- A. Microsoft Power BI.
- B. Microsoft Excel.
- C. R.
- D. SAS.
Answer: C
NEW QUESTION 87
What output from a statistical test is used when performing hypothesis testing?
- A. Standard deviation
- B. P-value
- C. R-value
- D. Alpha value
Answer: B
NEW QUESTION 88
Which dimension of data quality ensures that data stored in multiple locations is the same?
- A. Consistency.
- B. Accuracy.
- C. Validity.
- D. Completeness.
Answer: A
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 89
What would be an example of an acceptable form of primary identification for the Data+ exam?
- A. Passport.
- B. Credit card with photo and signature.
- C. Employee ID card.
- D. School ID card.
Answer: A
NEW QUESTION 90
Chris is building a database to store prices for items on a restaurant menu.
What data type is most appropriate for this field?
- A. Date.
- B. Numeric.
- C. Alphanumeric.
- D. Tags.
Answer: B
Explanation:
Prices are numbers stored in dollars and cents; as such, the data type needs to be capable of storing numbers.
NEW QUESTION 91
Analyze the values of X shown below
(2,2,5,6,7)
What is the modal value?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: D
NEW QUESTION 92
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What are the steps to follow for the registration for the CompTIA DA0-001 Exam
Go to the official website of CompTIA Data+ and click on the “Register” button.
Fill in all the required fields in the registration form and click on “Submit”.
A confirmation email will be sent to you, which contains a link to activate your account and a link to print your exam voucher (you can also opt for an alternative method of delivery).
Go through your exam voucher and note down all the details mentioned on it, including: Exam ID, Exam Number, Date, Time & Location of test, Venue Phone Number (if applicable).
Take a printout of this voucher and carry it with you when appearing for your exam at the specified venue on that particular day/time window allotted by CompTIA to test centers worldwide
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DA0-001 Exam Dumps, DA0-001 Practice Test Questions: https://drive.google.com/open?id=1D8Uy656U2eu7DYOoOn1I3Bw0znJDmSwV