Excellent DA0-001 Updated 2023 Dumps With 100% Exam Passing Guarantee
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NEW QUESTION 43
Taylor wants to investigate how manufacturing, marketing, and sales expenditures impact overall profitability for her company.
Which of the following systems is the most appropriate?
- A. OLTP.
- B. OLAP.
- C. Data mart.
- D. Data warehouse.
Answer: D
Explanation:
A Data mart is too narrow, because Taylor needs data from across multiple divisions.
OLAP is a broad term for analytical processing, and OLTP systems are transactional and not ideal for the task. Since Taylor is working with data across multiple different divisions, she will work with a Data warehouse.
NEW QUESTION 44
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. Power BI.
- B. QLIK.
- C. Minitab.
- D. Rapid Miner.
Answer: C
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.
NEW QUESTION 45
Which of the following is an example of a discrete data type?
- A. 8in (20cm)
- B. 10.7lbs (4.9kg)
- C. 5 kids
- D. 2.5mi (4km)
Answer: C
NEW QUESTION 46
Which of the following roles is responsible for ensuring an organization's data quality, security, privacy, and regulatory compliance?
- A. Data owner.
- B. Data processor.
- C. Data custodian.
- D. Data steward.
Answer: D
Explanation:
Correct answer B. Data steward.
A data steward is responsible for leading an organization's data governance activities, which include data quality, security, privacy, and regulatory compliance.
NEW QUESTION 47
Consider the following dataset which contains information about houses that are for sale:
Which of the following string manipulation commands will combine the address and region name columns to create a full address?
full_address------------------------- 85 Turner St, Northern Metropolitan 25 Bloomburg St, Northern Metropolitan 5 Charles St, Northern Metropolitan 40 Federation La, Northern Metropolitan 55a Park St, Northern Metropolitan
- A. SELECT CONCAT(regionname, '-' , address) AS full_address FROM melb LIMIT 5;
- B. SELECT CONCAT(address, '-' , regionname) AS full_address FROM melb LIMIT 5;
- C. SELECT CONCAT(address, ' , ' , regionname) AS full_address FROM melb LIMIT 5;
- D. SELECT CONCAT(regionname, ' , ' , address) AS full_address FROM melb LIMIT 5
Answer: C
Explanation:
The correct answer is A: SELECT CONCAT(address, ' , ' , regionname) AS full_address FROM melb LIMIT 5; String manipulation (or string handling) is the process of changing, parsing, splicing, pasting, or analyzing strings. SQL is used for managing data in a relational database. The CONCAT() function adds two or more strings together. Syntax CONCAT(stringl, string2,... string_n) Parameter Values Parameter Description stringl, string2, string_n Required. The strings to add together.
NEW QUESTION 48
Different people manually type a series of handwritten surveys into an online database. Which of the following issues will MOST likely arise with this data? (Choose two.)
- A. Data attribute limitations
- B. Data bias
- C. Data consistency
- D. Data manipulation
- E. Data constraints
- F. Data accuracy
Answer: D,F
NEW QUESTION 49
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. 2019 vs. YTD 2020
- C. Q4 2019 vs. Q3 2020
- D. YTD 2019 vs. YTD 2020
Answer: A
NEW QUESTION 50
What cybersecurity goal protects an organization's data from unauthorized modification?
- A. Confidentiality.
- B. Availability.
- C. Non-repudiation.
- D. Integrity.
Answer: D
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 51
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. Redundant Data.
- B. Duplicate Data.
- C. Invalid Data.
- D. Missing Data.
Answer: C
Explanation:
Duplicate Data.
While invalid, redundant, or missing data are all valid concerns, data about people exists in two of the six systems. As such, Jhon needs to account for duplicate data issues.
NEW QUESTION 52
A data analyst has been asked to derive a new variable labeled "Promotion_flag" based on the total quantity sold by each salesperson. Given the table below:
Which of the following functions would the analyst consider appropriate to flag "Yes" for every salesperson who has a number above 1,000,000 in the Quantity_sold column?
- A. Aggregate
- B. Logical
- C. Date
- D. Mathematical
Answer: A
NEW QUESTION 53
What SQL command is used to delete an entire table from a database?
- A. DELETE.
- B. ALTER.
- C. MODIFY.
- D. DROP.
Answer: D
NEW QUESTION 54
Which of the following would be considered non-personally identifiable information?
- A. Government ID number
- B. Cell phone device name
- C. Telephone number
- D. Customer's name
Answer: B
NEW QUESTION 55
An analyst has been asked to validate data quality. Which of the following are the BEST reasons to validate data for quality control purposes? (Choose two.)
- A. Transmission
- B. Encryption
- C. Retention
- D. Deletion
- E. Consistency
- F. Integrity
Answer: E,F
NEW QUESTION 56
Most data that exists in the world is structured data.
- A. True
- B. False
Answer: B
NEW QUESTION 57
Which of the following describes the method of sampling in which elements of data are selected randomly from each of the small subgroups within a population?
- A. Cluster
- B. Systematic
- C. Stratified
- D. Simple random
Answer: B
NEW QUESTION 58
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 pie chat using the site and percentage of new customers data.
- B. Include a bar chart using the site and the percentage of new customers data.
- C. Include a scatter chart using the site and the percent of new customers data.
- D. Include a line chart using the site and the percentage of new customers data.
Answer: B
NEW QUESTION 59
What's the minimum passing score on the Data+ exam?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
NEW QUESTION 60
What symbol is used for the variance of a population of data?
- A. 2x2
- B. 0
- C. 0x2
- D. s
Answer: C
Explanation:
The sample variance is defined by(15.59)We use the symbol sx2 for a sample variance and the symbol ox2 for a population variance.
NEW QUESTION 61
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CompTIA Data+ is designed to ensure that candidates have a thorough understanding of how data storage works and the basic concepts involved in managing it. This includes an understanding of how information is stored electronically on hard drives, solid-state drives (SSDs), magnetic tapes, optical discs and other storage devices; along with how data can be retrieved from these devices using appropriate software tools.
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