[2023] Valid DA0-001 test answers & CompTIA DA0-001 exam pdf
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Things You Should Know about the CompTIA DA0-001 Exam
CompTIA Data+ is a certification that validates your understanding of the fundamentals of computer data storage and management. It's a foundational certification that can be used to secure entry-level positions in various fields, such as IT, business intelligence, and application development.
CompTIA Data+ is not the only certification available for this subject matter. The CompTIA A+ and Microsoft Certified Solutions Associate exams also cover similar material. However, unlike those exams, CompTIA D+ does not have a pre-requisite requirement for passing it. If you already have a working knowledge of networking, operating systems (OS), and some basic computer concepts, you can prepare for this exam without any prior experience in these areas. CompTIA DA0-001 exam dumps will help you to clear the concepts.
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.
NEW QUESTION 14
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. Q3 2019 vs. Q3 2020
- C. YTD 2019 vs. YTD 2020
- D. Q4 2019 vs. Q3 2020
Answer: B
NEW QUESTION 15
How should data classifications be assigned?
- A. According to sensitivity and criticality.
- B. According to sensitivity, criticality and age.
- C. According to sensitivity.
- D. According to criticality.
Answer: A
NEW QUESTION 16
Given the table below:
Which of the following variable types BEST describes the "Year" column?
- A. Text
- B. Numeric
- C. Alphanumeric
- D. Date
Answer: D
NEW QUESTION 17
An analyst needs to provide a chart to identify the composition between the categories of the survey response data set:
Which of the following charts would be BEST to use?
- A. Histogram
- B. Scatter pot
- C. Pie
- D. Line
- E. Waterfall
Answer: C
NEW QUESTION 18
Which one of the following values would not be appropriately stored in integer data type?
- A. 0
- B. 1.2
- C. 1
- D. 2
Answer: B
NEW QUESTION 19
Which of the following would be used to store unstructured data from different sources?
- A. A data warehouse
- B. A data lake
- C. A database management system
- D. A database
Answer: B
NEW QUESTION 20
Which of the following descriptive statistical methods are measures of central tendency? (Choose two.)
- A. Mean
- B. Variance
- C. Minimum
- D. Maximum
- E. Correlation
- F. Mode
Answer: A,F
NEW QUESTION 21
Which of the following is used for calculations and pivot tables?
- A. Microsoft Excel
- B. Domo
- C. SAS
- D. IBM SPSS
Answer: A
NEW QUESTION 22
What effort has the goal of maintaining a single source of truth for the most important data elements handled by the organization?
- A. DLP (Data Loss Prevention)
- B. MDM (Master Data Management)
- C. MAM (Mobile Application Management)
- D. IPS (Intrusion Prevention System)
Answer: B
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 23
Data stewards protect the organization from legal violations that may result in costly fines and negative publicity.
- A. True.
- B. False.
Answer: A
NEW QUESTION 24
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 views for team, individuals, and management. Configure permissions to control access.
- C. Create a dashboard for sales numbers, pipeline, and team and individual performance for the management team.
- D. Create a dashboard with filters for the overall team, individuals, and management. Users can filter to see the data they want.
Answer: C
NEW QUESTION 25
What colors are commonly used for the change bars in a waterfall chart?
- A. Blue and Green
- B. Red and Green
- C. Blue and Yellow
- D. Red and Yellow
Answer: B
NEW QUESTION 26
A customer list from a financial services company is shown below:
A data analyst wants to create a likely-to-buy score on a scale from 0 to 100, based on an average of the three numerical variables: number of credit cards, age, and income. Which of the following should the analyst do to the variables to ensure they all have the same weight in the score calculation?
- A. Recode the variables.
- B. Calculate the percentiles of the variables.
- C. Normalize the variables.
- D. Calculate the standard deviations of the variables.
Answer: D
NEW QUESTION 27
Zip code,____________, and___________ uniquely identify 87% of people in the United States.
- A. first name, last name
- B. gender, first name
- C. phone number, email address
- D. date of birth, gender
Answer: D
NEW QUESTION 28
A web developer wants to ensure that malicious users can't type SQL statements when they asked for input, like their username/userid.
Which of the following query optimization techniques would effectively prevent SQL Injection attacks?
- A. Temporary table in the query set.
- B. Subset of records.
- C. Parametrization.
- D. Indexing.
Answer: C
Explanation:
The correct answer is D: Parametrization. Parameterized SQL queries allow you to place parameters in an SQL query instead of a constant value. A parameter takes a value only when the query is executed, allowing the query to be reused with different values and purposes. Parameterized SQL statements are available in some analysis clients, and are also available through the Historian SDK.
For example, you could create the following conditional SQL query, which contains a parameter for the collector's name: SELECT* FROM ExamsDigest WHERE coursename=? ORDER BY tagname SQL Injection is best prevented through the use of parameterized queries.
NEW QUESTION 29
While reviewing survey data, a research analyst notices data is missing from all the responses to a single question. Which of the following methods would BEST address this issue?
- A. Replace missing data.
- B. Remove invalid data.
- C. Replace redundant data.
- D. Remove duplicate data.
Answer: C
NEW QUESTION 30
A cereal manufacturer wants to determine whether the sugar content of its cereal has increased over the years. Which of the following is the appropriate descriptive statistic to use?
- A. Mean
- B. Frequency
- C. Variance
- D. Percent change
Answer: A
NEW QUESTION 31
Which of the following BEST describes the issue in which character values are mixed with integer values in a data set column?
- A. Data outliers
- B. Invalid data type
- C. Duplicate data
- D. Missing data
Answer: C
NEW QUESTION 32
Kelly wants to get feedback on the final draft of a strategic report that has taken her six months to develop.
What can she do to get prevent confusion as see seeks feedback before publishing the report?
Choose the best answer.
- A. Publish the report on an internally facing website.
- B. Use a watermark to identify the report as a draft.
- C. Show the report to her immediate supervisor.
- D. Distribute the report to the appropriate stakeholders via email.
Answer: B
Explanation:
While Kelly needs feedback from the appropriate stakeholders, doing so without a watermark could lead them to believe the report they receive is the final product.
NEW QUESTION 33
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. Duplicate Data.
- B. Redundant Data.
- C. Missing Data.
- D. Invalid Data.
Answer: D
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 34
Which one the following is not considered an aggregate function?
- A. MAX
- B. SELECT
- C. MIN
- D. SUM
Answer: B
NEW QUESTION 35
A data analyst needs to calculate the mean for Q1 sales using the data set below:
Which of the following is the mean?
- A. $3,082.72
- B. $12,330.88
- C. $2,667.60
- D. $2,466.18
Answer: D
NEW QUESTION 36
A data analyst needs to present the results of an online marketing campaign to the marketing manager. The manager wants to see the most important KPIs and measure the return on marketing investment. Which of the following should the data analyst use to BEST communicate this information to the manager?
- A. A summary with statistics, conclusions, and recommendations from the data analyst
- B. A sell-service dashboard that allows the manager to look at the company's annual budget performance
- C. A real-time monitor that allows the manager to view performance the day the campaign was launched
- D. A spreadsheet of the raw data from all marketing campaigns and channels
Answer: A
NEW QUESTION 37
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 38
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