[Nov-2023] Exam Sure Pass CompTIA Certification with DA0-001 exam questions
Real CompTIA DA0-001 Exam Questions Study Guide
CompTIA DA0-001 exam is intended for IT professionals who work with data on a regular basis, including data analysts, database administrators, and network administrators. It is also suitable for individuals who are interested in pursuing a career in data management or related fields. DA0-001 exam is available in English and Japanese and consists of 80 multiple-choice questions that must be completed within 90 minutes.
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
NEW QUESTION # 109
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. Percent change
- C. Variance
- D. Frequency
Answer: B
NEW QUESTION # 110
What cybersecurity goal protects an organization's data from unauthorized modification?
- A. Integrity.
- B. Non-repudiation.
- C. Confidentiality.
- D. Availability.
Answer: A
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 # 111
You have a database where queries are performing slowly.
Investigating the results, you find that the database is performing a time-consuming table scan.
What action can best improve the query performance?
- A. Parameterizing the query.
- B. Sub setting the records.
- C. Adding an index.
- D. Recompiling the query.
Answer: C
Explanation:
You create an index to optimize performance when searching the table using the Find function and to establish uniqueness of table columns.
Indexing makes columns faster to query by creating pointers to where data is stored within a database. Imagine you want to find a piece of information that is within a large database. To get this information out of the database the computer will look through every row until it finds it.
NEW QUESTION # 112
Which of the following is a control measure for preventing a data breach?
- A. Data retention
- B. Data attribution
- C. Data transmission
- D. Data encryption
Answer: D
NEW QUESTION # 113
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. OLAP.
- B. Data Warehouse.
- C. OLTP.
- D. Data mart.
Answer: B
Explanation:
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 # 114
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. Missing Data.
- C. Duplicate 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 # 115
Given the following report:
Which of the following components need to be added to ensure the report is point-in-time and static? (Choose two.)
- A. A control group for the phrases
- B. Filter buttons for the status
- C. A summary of the KPIs
- D. The time period the report covers
- E. The date on which the report was run
- F. The date when the report was last accessed
Answer: D
Explanation:
Explanation
The date on which the report was run. This is because the time period the report covers and the date on which the report was run are two components that need to be added to ensure the report is point-in-time and static, which means that the report shows the data as it was at a specific moment or interval in time, and does not change or update with new data. By adding the time period the report covers and the date on which the report was run, the analyst can indicate when and for how long the data was collected and analyzed, as well as avoid any confusion or ambiguity about the currency or validity of the data. The other components do not need to be added to ensure the report is point-in-time and static. Here is why:
A control group for the phrases is a type of group that serves as a baseline or a reference for comparison with another group that is exposed to some treatment or intervention, such as a target phrase in this case. A control group for the phrases does not need to be added to ensure the report is point-in-time and static, because it does not affect the time frame or the stability of the data. However, a control group for the phrases could be useful for evaluating the effectiveness or impact of the target phrases on customer satisfaction or retention.
A summary of the KPIs is a type of document that provides an overview or a highlight of the key performance indicators (KPIs), which are measurable values that indicate how well an organization or a process is achieving its goals or objectives. A summary of the KPIs does not need to be added to ensure the report is point-in-time and static, because it does not affect the time frame or the stability of the data. However, a summary of the KPIs could be useful for communicating or presenting the main findings or insights from the report.
Filter buttons for the status are a type of feature or function that allows users to select or deselect certain values or categories in a column or a table, such as ticket statuses in this case. Filter buttons for the status do not need to be added to ensure the report is point-in-time and static, because they do not affect the time frame or the stability of the data. However, filter buttons for the status could be useful for exploring or analyzing different aspects or segments of the data.
NEW QUESTION # 116
Which one of the following would not normally be considered a summary statistic?
- A. Mean.
- B. z-score.
- C. Standard deviation.
- D. Variance.
Answer: B
Explanation:
Explanation
Simply put, a z-score (also called a standard score) gives you an idea of how far from the mean a data point is.
But more technically it's a measure of how many standard deviations below or above the population mean a raw score is. A z-score can be placed on a normal distribution curve.
NEW QUESTION # 117
An analyst has received the requirements for an internal user dashboard. The analyst confirms the data sources and then creates a wireframe. Which of the following is the NEXT step the analyst should take in the dashboard creation process?
- A. Create subscriptions.
- B. Get stakeholder approval.
- C. Optimize the dashboard.
- D. Deploy to production.
Answer: C
NEW QUESTION # 118
Which of the following data manipulation techniques is an example of a logical function?
- A. WHERE
- B. AGGREGATE
- C. IF
- D. BOOLEAN
Answer: D
NEW QUESTION # 119
What technique can you use to predict one value from another using a linear relationship?
- A. Chi-square.
- B. Hypothesis testing.
- C. Regression.
- D. Correlation.
Answer: C
NEW QUESTION # 120
Which of the following actions should be taken when transmitting data to mitigate the chance of a data leak occurring? (Choose two.)
- A. Fata removal
- B. Data identification
- C. Data reporting
- D. Data masking
- E. Data encryption
- F. Data processing
Answer: D,E
NEW QUESTION # 121
Given the diagram below:
Which of the following data schemas shown?
- A. Relational database
- B. Online transactional processing
- C. Key-value pairs
- D. Data lake
Answer: A
NEW QUESTION # 122
Angela is aggregating data from CRM system with data from an employee system.
While performing an initial quality check, she realizes that her employee ID is not associated with her identifier in the CRM system.
What kind of issues is Angela facing?
Choose the best answer.
- A. ETL process.
- B. System integration.
- C. ELT process.
- D. Record linkage.
Answer: D
Explanation:
While this scenario describes a system integration challenge that can be solved with ETL or ELT, Angela is facing a Record linkage issue.
NEW QUESTION # 123
Given the following data:
Which of the following BEST describes the data set?
- A. There is data bias.
- B. The data is outliers.
- C. The data is inconsistent.
- D. The data is incomplete.
Answer: B
NEW QUESTION # 124
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 line chart using the site and the percentage of new customers data.
- B. Include a scatter chart using the site and the percent of new customers data.
- C. Include a bar chart using the site and the percentage of new customers data.
- D. Include a pie chat using the site and percentage of new customers data.
Answer: C
Explanation:
Explanation
This is because a bar chart is a type of chart that shows the value or the amount of a single variable for different categories or groups, such as the percentage of new customers for different sites in this case. A bar chart can be used to display and analyze the comparison, ranking, or proportion among the categories or groups, as well as identify any differences, similarities, or outliers in the data. For example, a bar chart can show which site has the highest or lowest percentage of new customers, as well as show how much each site contributes to the total percentage of new customers. The other types of charts are not the best charts to display the data. Here is why:
A line chart is a type of chart that shows the change or the trend of a single variable over time, such as the percentage of new customers over months or years in this case. A line chart can be used to display and analyze the movement, cycle, or pattern of the variable, as well as identify any peaks, valleys, or fluctuations in the data. For example, a line chart can show how the percentage of new customers increases or decreases over time, as well as show if there are any seasonal or periodic variations in the data.
A pie chart is a type of chart that shows the proportion or the percentage of a single variable for different categories or groups, such as the percentage of new customers for different sites in this case. A pie chart can be used to display and analyze the composition, distribution, or share of the variable, as well as identify any segments, slices, or fractions in the data. For example, a pie chart can show how much each site represents of the total percentage of new customers, as well as show if there are any dominant or minor sites in the data.
A scatter chart is a type of chart that shows the relationship between two variables for each observation or unit in a data set, such as the percentage of new customers and another variable for each site in this case. A scatter chart can be used to display and analyze the correlation, trend, or pattern among the variables, as well as identify any outliers or clusters in the data. For example, a scatter chart can show if there is a positive, negative, or no correlation between the percentage of new customers and another variable, such as sales revenue or customer satisfaction.
NEW QUESTION # 125
James wants to analyze profit based on sales of five different product categories.
His source data set consists of 5.8 million rows with columns including region, product category, product name, and sales price.
How should he manipulate the data to facilitate his analysis?
Choose the best answer.
- A. Transpose by product category and summarize.
- B. Transpose by sales price and summarize.
- C. Transpose by region and summarize.
- D. Transpose by product name and summarize.
Answer: A
Explanation:
Correct answer B. Transpose by product category and summarize.
We can transpose this data by product category to perform this analysis broken out by product category.
Transposing by sales price, region, or product name will not further his state analytical goal.
NEW QUESTION # 126
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