Free CompTIA (DA0-001) Certification Sample Questions with Online Practice Test [Q52-Q67]

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Free CompTIA (DA0-001) Certification Sample Questions with Online Practice Test

DA0-001 Certification Study Guide Pass DA0-001 Fast

The CompTIA Data+ Certification Exam certification exam covers various topics related to data management, including data analysis, data modeling, data warehousing, data governance, and data quality. It also covers the fundamental concepts of database administration and the use of database management systems (DBMS).

CompTIA Data+ Certification Exam covers a wide range of topics, including data storage and management, security, privacy, and ethics. Candidates who pass DA0-001 exam demonstrate their ability to work with different types of data, such as structured and unstructured data, and their understanding of data management best practices.

Q52. Which of the following data manipulation techniques is an example of a logical function?

WHERE

AGGREGATE

BOOLEAN

Q53. A data analyst has been asked to merge the tables below, first performing an INNER JOIN and then a LEFT JOIN:

Customer Table –
In-store Transactions –

Which of the following describes the number of rows of data that can be expected after performing both joins in the order stated, considering the customer table as the main table?

INNER: 6 rows; LEFT: 9 rows

INNER: 9 rows; LEFT: 6 rows

INNER: 9 rows; LEFT: 15 rows

INNER: 15 rows; LEFT: 9 rows

Q54. 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?

2019 vs. YTD 2020

Q3 2019 vs. Q3 2020

YTD 2019 vs. YTD 2020

Q4 2019 vs. Q3 2020

Q55. A data analyst needs to collect a similar proportion of data from every state. Which of the following sampling methods would be the most appropriate?

Systematic sampling

Convenience sampling

Stratified sampling

Random sampling

Q56. What technique can you use to predict one value from another using a linear relationship?

Hypothesis testing.

Correlation.

Regression.

Chi-square.

Q57. Which of the following is an example of a discrete data type?

8in (20cm)

5 kids

2.5mi (4km)

10.7lbs (4.9kg)

Q58. 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?

Create a dashboard displaying a data refresh date so users know the current sales numbers and configure permissions to control access.

Create a dashboard for sales numbers, pipeline, and team and individual performance for the management team.

Create a dashboard with filters for the overall team, individuals, and management. Users can filter to see the data they want.

Create a dashboard with views for team, individuals, and management. Configure permissions to control access.

Explanation
Create a dashboard with views for team, individuals, and management. Configure permissions to control access. This is because a dashboard is a type of visualization that displays multiple charts or graphs on a single page, usually to provide an overview or summary of some data or information. A dashboard can be used to provide visibility of current sales numbers, pipeline, and team performance by showing different metrics and indicators related to these aspects. By creating a dashboard with views for team, individuals, and management, the analyst can customize the content and layout of the dashboard for different audiences and purposes. By configuring permissions to control access, the analyst can ensure that the confidential information, such as individuals’ earned commissions and projected commissions based on sales, is only visible to the authorized users. The other ways are not the best way to provide this visibility. Here is why:
Creating a dashboard displaying a data refresh date so users know the current sales numbers and configuring permissions to control access would not be sufficient to provide visibility of pipeline and team performance, as well as individuals’ earned commissions and projected commissions based on sales. The dashboard would only show the current sales numbers and the date when the data was updated, which would not give a comprehensive or detailed view of the sales situation.
Creating a dashboard for sales numbers, pipeline, and team and individual performance for the management team would not be appropriate to provide visibility for the sales team, as they would not have access to the dashboard or the information they need. The dashboard would only be available for the management team, which would limit the transparency and collaboration among the sales team members.
Creating a dashboard with filters for the overall team, individuals, and management would not be secure to provide visibility of confidential information, such as individuals’ earned commissions and projected commissions based on sales. The dashboard would allow users to filter and see the data they want, which could expose sensitive or personal information to unauthorized users.

Q59. 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?

The data analyst is not querying the databases correctly.

The databases are recording different events.

The databases are recording the event in different time zones.

The second database is logging incorrectly.

Q60. An e-commerce company recently tested a new website layout. The website was tested by a test group of customers, and an old website was presented to a control group. The table below shows the percentage of users in each group who made purchases on the websites:

Which of the following conclusions is accurate at a 95% confidence interval?

In Germany, the increase in conversion from the new layout was not significant.

In France, the increase in conversion from the new layout was not significant.

In general, users who visit the new website are more likely to make a purchase.

The new layout has the lowest conversion rates in the United Kingdom.

Q61. You would like to measure how well an organization is achieving its goals.
What type of analysis should you perform?

Performance analysis.

Outlier analysis.

Predictive analysis.

Trend analysis.

Q62. Given the data below:

In which of the following file formats is the data presented?

CSV

RIF

XML

Q63. 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?

The data analyst is not querying the databases correctly.

The databases are recording different events.

The databases are recording the event in different time zones.

The second database is logging incorrectly.

Q64. 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?

Sub setting the records.

Parameterizing the query.

Recompiling the query.

Adding an index.

Q65. What European law requires that organizations handling personal information designate a Data Protection Officer (DPO)?

HIPAA (Health Insurance Portability and Accountability Act)

GLBA (Gramm-Leach-Bliley Act)

GDPR (General Data Protection Regulation)

FERPA (Family Educational Rights and Privacy Act)

Q66. Given the following data tables:

Which of the following MDM processes needs to take place FIRST?

Creation of a data dictionary

Compliance with regulations

Standardization of data field names

Consolidation of multiple data fields

Q67. Which of the following query optimization techniques involves examining only the data that is needed for a particular task?

Making a temporary table

Creating a flat file

Indexing documents

Creating an execution plan

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