100% Free CompTIA Data+ DA0-001 Dumps PDF Demo Cert Guide Cover
PDF Exam Material 2023 Realistic DA0-001 Dumps Questions
NEW QUESTION # 50
Which of the following are reasons to create and maintain a data dictionary? (Choose two.)
- A. To provide continuity through personnel turnover
- B. To remember specifics about data fields
- C. To confine breaches of PHI data
- D. To specify user groups for databases
- E. To improve data acquisition
- F. To reduce processing power requirements
Answer: B,E
NEW QUESTION # 51
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. Q4 2019 vs. Q3 2020
- B. 2019 vs. YTD 2020
- C. YTD 2019 vs. YTD 2020
- D. Q3 2019 vs. Q3 2020
Answer: D
NEW QUESTION # 52
A junior web developer is developing a new application where users can upload short videos. The first task is to create a homepage that shows the headline "Upload Your Short Videos" and a clickable button that says "upload now".
Which of the following HTML commands would help the developer to complete the task successfully?
- A. < hl >Upload Your Short Videos< /h1 >< button >upload now< /button >
- B. < span >Upload Your Short Videos< /span >< button >upload now< /button >
- C. < p >Upload Your Short Videos< /p >< p >upload now< /p >
- D. < hl >Upload Your Short Videos< /h1 >< hl >upload now< /h1 >
Answer: A
Explanation:
The correct answer is: Upload Your Short Videos
upload now
The two tags are used to define HTML headings. defines the most important heading. defines the least important heading.
Note: Only use one per page - this should represent the main heading/subject for the whole page. The tag defines a clickable button.
NEW QUESTION # 53
An analyst is working with the income data of suburban families in the United States. The data set has a lot of outliers, and the analyst needs to provide a measure that represents the typical income. Which of the following would BEST fulfill the analyst's goal?
- A. Median
- B. Standard deviation
- C. Mode
- D. Mean
Answer: D
NEW QUESTION # 54
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. Data mart.
- B. Data warehouse.
- C. OLAP.
- D. OLTP.
Answer: B
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 # 55
Which one of the following is a common data warehouse schema?
- A. Square.
- B. Spiral.
- C. Snowflake.
- D. Sphere.
Answer: C
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.
NEW QUESTION # 56
What GAPP principle says that organizations should provide data subjects with the ability to review and update their personal information?
- A. Access
- B. Choice
- C. Consent
- D. Notice
Answer: A
NEW QUESTION # 57
An analyst is required to run a text analysis of data that is found in articles from a digital news outlet. Which of the following would be the BEST technique for the analyst to apply to acquire the data?
- A. ETL
- B. Data wrangling
- C. Sampling
- D. Web scraping
Answer: D
NEW QUESTION # 58
You recently downloaded a file containing website visitor logs from your organization's web server.
What term best describes these logs at this point in the process?
- A. Information.
- B. Intelligence.
- C. Data.
- D. Schema.
Answer: C
NEW QUESTION # 59
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. Misspellings.
- C. Commas.
- D. Apostrophe.
- E. Duplicates.
Answer: B,E
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 # 60
Which of the following data cleansing issues will be fixed when a DISTINCT function is applied?
- A. Redundant data
- B. Invalid data
- C. Missing data
- D. Duplicate data
Answer: D
NEW QUESTION # 61
Mario works with a group of R programmers tasked with copying data from an accounting system into a data warehouse.
In what phase are the group's R skills most relevant?
- A. Extract.
- B. Load.
- C. Transform.
- D. Purge.
Answer: C
Explanation:
Correct answer C. Transform
The R programming language is used to manipulate and model data.
In the ETL process, this activity normally takes place during the Transform phase.
The Extract and Load phases typically use database-centric tools.
Purging data from database is typically done using SQL.
NEW QUESTION # 62
Which of the following BEST describes the issue in which character values are mixed with integer values in a data set column?
- A. Invalid data type
- B. Missing data
- C. Duplicate data
- D. Data outliers
Answer: C
NEW QUESTION # 63
Given the table below:
Which of the following variable types BEST describes the "Year" column?
- A. Numeric
- B. Date
- C. Alphanumeric
- D. Text
Answer: B
NEW QUESTION # 64
Most data that exists in the world is structured data.
- A. False
- B. True
Answer: A
NEW QUESTION # 65
What term indicates whether an attribute's value is within an expected range?
- A. Data validity.
- B. Data availability.
- C. Data processing.
- D. Data integrity.
Answer: A
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 # 66
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