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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 46
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 four discrete data subjects, create one role for each subject area.
- B. Create a single role that includes finance, human resources, sales, and customer services data.
- C. Enable multifactor authentication (MFA) to protect the data.
- D. Since there are 15 people on her team, create a role for each person to improve security.
Answer: B
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 47
What European law requires that organizations handling personal information designate a Data Protection Officer (DPO)?
- A. FERPA (Family Educational Rights and Privacy Act)
- B. GLBA (Gramm-Leach-Bliley Act)
- C. GDPR (General Data Protection Regulation)
- D. HIPAA (Health Insurance Portability and Accountability Act)
Answer: C
Explanation:
The General Data Protection Regulation 2016/679 is a regulation in EU law on data protection and privacy in the European Union and the European Economic Area.
NEW QUESTION 48
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 real-time monitor that allows the manager to view performance the day the campaign was launched
- B. A spreadsheet of the raw data from all marketing campaigns and channels
- C. A sell-service dashboard that allows the manager to look at the company's annual budget performance
- D. A summary with statistics, conclusions, and recommendations from the data analyst
Answer: D
NEW QUESTION 49
The process of performing initial investigations on data to spot outliers, discover patterns, and test assumptions with statistical insight and graphical visualization is called:
- A. a performance analysis.
- B. an exploratory data analysis.
- C. a t-test.
- D. a link analysis.
Answer: B
NEW QUESTION 50
Which of the following entities would NOT be regulated by the Health Insurance Portability and Accountability Act (HIPAA)?
- A. A health information clearinghouse.
- B. A healthcare provider.
- C. A health insurance company.
- D. A health and fitness mobile app.
Answer: D
NEW QUESTION 51
A data analyst for a media company needs to determine the most popular movie genre. Given the table below:
Which of the following must be done to the Genre column before this task can be completed?
- A. Merge
- B. Concatenate
- C. Append
- D. Delimit
Answer: D
NEW QUESTION 52
A table in a hospital database has a column for patient height in inches and a column for patient height in centimeters. This is an example of:
- A. dependent data.
- B. invalid data
- C. redundant data
- D. duplicate data.
Answer: C
NEW QUESTION 53
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. Missing Data.
- B. Invalid Data.
- C. Redundant Data.
- D. Duplicate Data.
Answer: B
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 54
A development company is constructing a new unit in its apartment complex. The complex has the following floor plans:
Using the average cost per square foot of the original floor plans, which of the following should be the price of the Rose unit?
- A. $702,500
- B. $640,900
- C. $705,200
- D. $690,000
Answer: C
NEW QUESTION 55
A data analyst wants to create "Income Categories" that would be calculated based on the existing variable "Income". The "Income Categories" would be as follows:
Income category 1: less than $1.
Income category 2: more than $1 and less than $20,000.
Income category 3: more than $20,001 and less than $40,000.
Income category 4: more than $40,001.
Which of the following data manipulation techniques should the data analyst use to create "Income Categories"?
- A. Data merge
- B. Derived variables
- C. Data blending
- D. Data append
Answer: B
Explanation:
The correct answer is B: Derived variables Derived variables are variables that you create by calculating or categorizing variables that already exist in your data set.
Data merge is incorrect. Data merging is the process of combining two or more data sets into a single data set. Data blending is incorrect.
Data blending involves pulling data from different sources and creating a single, unique, dataset for visualization and analysis.
Data append is incorrect. A data append is a process that involves adding new data elements to an existing database.
NEW QUESTION 56
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: C
NEW QUESTION 57
Andrew conducts a study and wants to capture eye color.
What kind of data is eye color?
Choose the best response.
- A. Continuous.
- B. Discrete.
- C. Categorical.
- D. Alphanumeric.
Answer: C
Explanation:
Correct answer B. Categorical.
Eye color can only fall into a certain range of values; as such, it is categorical.
NEW QUESTION 58
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. Mean
- B. Standard deviation
- C. Median
- D. Mode
Answer: A
NEW QUESTION 59
How many variables are normally shown on a standard heat map?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
NEW QUESTION 60
Which of the following descriptive statistical methods are measures of central tendency? (Choose two.)
- A. Mean
- B. Variance
- C. Mode
- D. Minimum
- E. Correlation
- F. Maximum
Answer: A,C
NEW QUESTION 61
A user receives a large custom report to track company sales across various date ranges. The user then completes a series of manual calculations for each date range. Which of the following should an analyst suggest so the user has a dynamic, seamless experience?
- A. Build calculations into the report so they are done automatically.
- B. Add macros to the report to speed up the filtering and calculations process.
- C. Create multiple reports, one for each needed date range.
- D. Create a dashboard with a date range picker and calculations built in.
Answer: A
NEW QUESTION 62
Given the following data:
Which of the following BEST describes the data set?
- A. The data is incomplete.
- B. There is data bias.
- C. The data is inconsistent.
- D. The data is outliers.
Answer: D
NEW QUESTION 63
What subset of Structured Query Language (SQL) is used to add, remove, modify, or retrieve the information stored within a relational database?
- A. DDL.
- B. DSL.
- C. DQL.
- D. DML.
Answer: D
Explanation:
Correct answer D. DML.
The Data Manipulation Language (DML) is used to work with the data stored in a database. DML includes the SELECT, INSERT, UPDATE, and DELETE commands.
The Data Definition Language (DDL) contains the commands used to create and structure a relational database. It includes the CREATE, ALTER, and DROP commands.
DDL and DML are the only two sublanguages of SQL.
NEW QUESTION 64
A county in Illinois is conducting a survey to determine the mean annual income per household. The county is 427sq mi (2.65q km). Which of the following sampling methods would MOST likely result in a representative sample?
- A. Surveys sent to ten randomly selected homes within 5mi (8km) of the county's office
- B. Surveys sent to 100 randomly selected homes that are reflective of the population
- C. A systematic survey that is sent to 100 single-family homes in the county
- D. A stratified phone survey of 100 people that is conducted between 2:00 p.m. and 3:00 p.m.
Answer: B
NEW QUESTION 65
A recurring event is being stored in two databases that are housed in different geographical locations. A data analyst notices the event is being logged three hours earlier in one database than in the other database. Which of the following is the MOST likely cause of the issue?
- A. The second database is logging incorrectly.
- B. The data analyst is not querying the databases correctly.
- C. The databases are recording the event in different time zones.
- D. The databases are recording different events.
Answer: C
NEW QUESTION 66
Maria is developing a script that will perform some common analytics tasks.
In order to improve the efficiency of her workflow, she is using a package called the Tidyverse.
What programming language is she using?
- A. Ruby
- B. R
- C. C++
- D. Python
Answer: B
Explanation:
The tidyverse is a collection of packages for the R programming language designed to facilitate the analytics workflow.
The tidyverse is not available for Python, Ruby, or C++, all of which are general-purpose programming languages.
NEW QUESTION 67
When building a word cloud, what feature varies with the frequency that a word appears in the text?
- A. Font color.
- B. Font style.
- C. Font size.
- D. Font placement.
Answer: C
NEW QUESTION 68
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. Show the report to her immediate supervisor.
- B. Publish the report on an internally facing website.
- C. Use a watermark to identify the report as a draft.
- D. Distribute the report to the appropriate stakeholders via email.
Answer: C
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 69
What role in a data governance is typically responsible for day-to-day oversight of data use?
- A. Data stewards.
- B. Data processors.
- C. Data custodians
- D. Data owners.
Answer: A
NEW QUESTION 70
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