DA0-001 PDF Dumps Dec 23, 2023 Recently Updated Questions [Q65-Q87]

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DA0-001 PDF Dumps | Dec 23, 2023 Recently Updated Questions

DA0-001 Exam Questions – Valid DA0-001 Dumps Pdf

The primary aim of the CompTIA DA0-001 (CompTIA Data+) Certification Exam is to validate an individual’s fundamental understanding of data principles and data management solutions. The successful completion of DA0-001 exam validates that one has the fundamental data knowledge and skills necessary for an entry-level data analyst, data technician, or data operator role. Many IT hiring managers look for the CompTIA Data+ certification as evidence of a candidate’s baseline data competencies, making it an excellent starting point for those pursuing a broader career in data science.

NEW QUESTION 65
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.

ETL process.

Record linkage.

ELT process.

System integration.

NEW QUESTION 66
A data analyst was asked to create a chart that shows the relationship between study hours and exam scores for each student using the data sets in the table below:

Which of the following charts would BEST represent the relationship between the variables?

A histogram

A scatter plot

A heat map

A bar chart

NEW QUESTION 67
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 t-test.

a performance analysis.

an exploratory data analysis.

a link analysis.

NEW QUESTION 68
Which of the following BEST describes standard deviation?

A measure that is used to establish a relationship between two variables

A measure of how data is distributed

A measure of the amount of dispersion of a set of values

A measure that is used to find the significant difference between variables

NEW QUESTION 69
Given the following customer and order tables:
Which of the following describes the number of rows and columns of data that would be present after performing an INNER JOIN of the tables?

Five rows, eight columns

Seven rows, eight columns

Eight rows, seven columns

Nine rows, five columns

NEW QUESTION 70
Which of the following data cleansing issues will be fixed when a DISTINCT function is applied?

Missing data

Duplicate data

Redundant data

Invalid data

NEW QUESTION 71
Which of the following tools would be best to use to calculate the interquartile range, median, mean, and standard deviation of a column in a table that has 5.000.000 rows?

Microsoft Excel

Snowflake

SQL

NEW QUESTION 72
A data analyst needs to calculate the mean for Q1 sales using the data set below:

Which of the following is the mean?

$2,466.18

$2,667.60

$3,082.72

$12,330.88

NEW QUESTION 73
A research analyst wants to determine whether the data being analyzed is connected to other datapoints. Which of the following is the BEST type of analysis to conduct?

Trend analysis

Performance analysis

Link analysis

Exploratory analysis

Explanation
This is because link analysis is a type of analysis that determines whether the data being analyzed is connected to other datapoints, such as entities, events, or relationships. Link analysis can be used to identify and visualize the patterns, networks, or associations among the datapoints, as well as measure the strength, direction, or frequency of the connections. For example, link analysis can be used to determine if there is a connection between a customer’s purchase history and their loyalty program status. The other types of analysis are not the best types of analysis to conduct to determine whether the data being analyzed is connected to other datapoints. Here is why:
Trend analysis is a type of analysis that determines whether the data being analyzed is changing over time, such as increasing, decreasing, or fluctuating. Trend analysis can be used to identify and visualize the patterns, cycles, or movements in the data points, as well as measure the rate, direction, or magnitude of the changes. For example, trend analysis can be used to determine if there is a change in a company’s sales revenue over a period of time.
Performance analysis is a type of analysis that determines whether the data being analyzed is meeting certain goals or objectives, such as targets, benchmarks, or standards. Performance analysis can be used to identify and visualize the gaps, deviations, or variations in the data points, as well as measure the efficiency, effectiveness, or quality of the outcomes. For example, performance analysis can be used to determine if there is a gap between a student’s test score and their expected score based on their previous performance.
Exploratory analysis is a type of analysis that determines whether there are any insights or discoveries in the data being analyzed, such as patterns, relationships, or anomalies. Exploratory analysis can be used to identify and visualize the characteristics, features, or behaviors of the data points, as well as measure their distribution, frequency, or correlation. For example, exploratory analysis can be used to determine if there are any outliers or unusual values in a dataset.

NEW QUESTION 74
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.

Duplicate Data.

Redundant Data.

Invalid Data.

Missing Data.

NEW QUESTION 75
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

NEW QUESTION 76
A database consists of one fact table that is composed of multiple dimensions. Depending on the dimension, each one can be represented by a denormalized table or multiple normalized tables. This structure is an example of a:

transactional schema.

star schema.

non-relational schema.

snowflake schema.

NEW QUESTION 77
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.

ETL process.

Record linkage.

ELT process.

System integration.

NEW QUESTION 78
Which of the following contains alphanumeric values?

10.1E

13.6

1347

A3J7

NEW QUESTION 79
Jenny wants to study the academic performance of undergraduate sophomores and wants to determine the average grade point average at different points during an academic year.
What best describes the data set she needs?

Sample.

Observation.

Variable.

Population.

NEW QUESTION 80
A data analyst is designing a dashboard that will provide a story of sales and determine which site is providing the highest sales volume per customer. 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?

Include a line chart using the site and average sales per customer.

Include a scatter chart using sales volume and average sales per customer.

Include a column chart using the site and sales to average sales per customer.

Include a pie chart using the site and sales to average sales per customer.

NEW QUESTION 81
Which one of the following values would not be appropriately stored in integer data type?

-16

10921

1.2

NEW QUESTION 82
Which of the following would be considered non-personally identifiable information?

Cell phone device name

Customer’s name

Government ID number

Telephone number

NEW QUESTION 83
What would be an example of an acceptable form of primary identification for the Data+ exam?

Passport.

School ID card.

Employee ID card.

Credit card with photo and signature.

NEW QUESTION 84
Given the diagram below:

Which of the following data schemas shown?

Key-value pairs

Online transactional processing

Data Lake

Relational database

NEW QUESTION 85
A data analyst has a set with more than 40.000 rows in the sample schema below:

The analyst would like to create one column that contains the customers’ birth dates. Which of the following data quality dimensions would BEST explain the reason for compilation?

Data accuracy

Data completeness

Data duplication

Data integrity

NEW QUESTION 86
Which of the following are reasons to create and maintain a data dictionary? (Choose two.)

To improve data acquisition

To remember specifics about data fields

To specify user groups for databases

To provide continuity through personnel turnover

To confine breaches of PHI data

To reduce processing power requirements

NEW QUESTION 87
Which of the following can be used to translate data into another form so it can only be read by a user who has a key or a password?

Data encryption.

Data transmission.

Data protection.

Data masking.

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