[Dec 17, 2023] Powerful DA0-001 PDF Dumps for DA0-001 Questions [Q26-Q47]

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[Dec 17, 2023] Powerful DA0-001 PDF Dumps for DA0-001 Questions

Authentic DA0-001 Dumps – Free PDF Questions to Pass

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.

QUESTION 26
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?

Include a bar chart using the site and the percentage of new customers data.

Include a line chart using the site and the percentage of new customers data.

Include a pie chart using the site and percentage of new custorners data.

Include a scatter chart using the site and the percent of new customers data.

QUESTION 27
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.

QUESTION 28
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?

Optimize the dashboard.

Create subscriptions.

Get stakeholder approval.

Deploy to production.

QUESTION 29
Which one of the following R values shows strongest positive correlation between two variables?

1.6

0.9

-0.4

QUESTION 30
Analytics reports should follow corporate style guidelines.

True.

False.

QUESTION 31
Given the data below:

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

CSV

RIF

XML

QUESTION 32
Under which of the following circumstances should the null hypothesis be accepted when a = 0.05?

When p is 0.00003

When p is 0.001

When p is 0.04

When p is 0.06

QUESTION 33
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?

Median

Mean

Mode

Standard deviation

Explanation
his is because median is a type of statistical measure that represents the typical value or central tendency of a data set, which means that it divides the data set into two equal halves, such that half of the values are above it and half are below it. Median can be used to provide a measure that represents the typical income of suburban families in the United States, especially when the data set has a lot of outliers, which means that it has values that are unusually high or low compared to the rest of the data set. Median can provide a measure that represents the typical income of suburban families in the United States, because it is not affected or skewed by the outliers, as it only depends on the middle value or the middle two values of the data set, regardless of how extreme or distant the outliers are. For example, median can provide a measure that represents the typical income of suburban families in the United States, by finding the income value that splits the data set into two equal groups of families, such that 50% of the families have higher incomes and 50% have lower incomes.
The other statistical measures are not the best measures to represent the typical income of suburban families in the United States. Here is why:
Mean is a type of statistical measure that represents the average value or central tendency of a data set, which means that it is the sum of all the values divided by the number of values. Mean is not a good measure to represent the typical income of suburban families in the United States, especially when the data set has a lot of outliers, because it is affected or skewed by the outliers, as it takes into account all the values in the data set, regardless of how extreme or distant they are. For example, mean can provide a measure that does not represent the typical income of suburban families in the United States, by finding the income value that is influenced by a few very high or very low incomes, which could make it higher or lower than most of the incomes in the data set.
Mode is a type of statistical measure that represents the most frequent value or mode of a data set, which means that it is the value that occurs most often in the data set. Mode is not a good measure to represent the typical income of suburban families in the United States, especially when the data set has a lot of outliers, because it is not representative or indicative of the central tendency or distribution of the data set, as it only depends on the count or occurrence of a single value or a few values in the data set, regardless of how common or rare they are. For example, mode can provide a measure that does not represent the typical income of suburban families in the United States, by finding the income value that is repeated more often than others, which could be an outlier or an anomaly in the data set.
Standard deviation is a type of statistical measure that represents the amount of dispersion or variation of a data set, which means that it quantifies how much the values in a data set vary or deviate from the mean or average of the data set. Standard deviation is not a measure that represents the typical income of suburban families in the United States, but rather a measure that describes the spread or distribution of their incomes, as well as identifies any outliers or extreme values in their incomes. For example, standard deviation can provide a measure that describes how diverse or homogeneous their incomes are, as well as how far their incomes are from their average income.

QUESTION 34
Data validation should occur only when data is initially brought into a organization.

True.

False.

QUESTION 35
Which of the following is a characteristic of a relational database?

It utilizes key-value pairs.

It has undefined fields.

It is structured in nature.

It uses minimal memory.

QUESTION 36
Given the following data:

Which of the following BEST describes the data set?

There is data bias.

The data is incomplete.

The data is inconsistent.

The data is outliers.

Explanation
This is because inconsistency is a type of data quality issue that occurs when the data does not follow a common format, structure, or rule across different sources or systems, which can affect the efficiency and performance of the analysis or process. Inconsistency can be caused by having different spellings, punctuations, capitalizations, or abbreviations for the same or similar values in a data set, such as “M”, “m”,
“Male”, or “male” for gender in this case. Inconsistency can be eliminated or reduced by using data cleansing techniques, such as standardizing or normalizing the data values. The other options are not correct descriptions of the data set. Here is why:
Data bias is a type of data quality issue that occurs when the data is not representative or proportional of the population or the parameter, which can affect the validity and reliability of the analysis or process.
Data bias can be caused by having a sample that is too small, too large, or too skewed for the population or the parameter, such as having only male customers for a product that targets both genders in this case.
Data bias can be eliminated or reduced by using sampling techniques, such as stratified or cluster sampling.
The data is incomplete is a type of data quality issue that occurs when the data is absent or missing in a data set, which can affect the accuracy and reliability of the analysis or process. The data is incomplete can be caused by various factors, such as human error, system error, or non-response. The data is incomplete can be addressed by using various methods, such as replacing or imputing the missing values with some reasonable estimates, such as mean, median, mode, or regression.
The data is outliers is a type of data quality issue that occurs when the data has values that are unusually high or low compared to the rest of the data set, which can affect the quality and validity of the analysis or process. The data is outliers can be caused by various factors, such as measurement error, natural variation, or extreme events. The data is outliers can be addressed by using various methods, such as removing or filtering out the outliers, or using robust statistics that are less sensitive to outliers, such as median, interquartile range, or box plot.

QUESTION 37
The duration of a phone call in milliseconds is an example of:

ordinal data.

nominal data.

boolean data.

continuous data.

QUESTION 38
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

QUESTION 39
Samantha needs to share a list of her organization’s top 50 customers with the VP of sales.
She would like to include the name of the customer, the business they represent, their contact information, and their total sales over the past year.
The VP does not have any specialized analytics skills or software but would like to make some personal notes on the dataset.
What would be the best tool for Samantha to use to share this information?

Power BI.

Microsoft Excel.

Minitab.

SAS.

QUESTION 40
An analysts building a monthly report for production and wants to ensure the audience is aware of its once-a-month cadence. Which of the following is the MOST important to convey that information?

The date of the dashboard build

The data refresh date

A report summary

Frequently asked questions

QUESTION 41
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?

Recode the variables.

Calculate the percentiles of the variables.

Calculate the standard deviations of the variables.

Normalize the variables.

QUESTION 42
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

QUESTION 43
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.

QUESTION 44
Which one of the following would not normally be considered a summary statistic?

Standard deviation.

Variance.

z-score.

Mean.

QUESTION 45
Which one of the following programming languages is specifically designed for use in analytics applications?

Python.

C++

Java.

QUESTION 46
A sales director has requested a report for individual team members within the division be developed. The director would like the report to be shared with all team members, but individual team members should not be identifiable within the report Which of the following access requirements would support the director’s needs?

Create an acceptable use policy for the sales data.

Release the report as user-group-based access and include data masking.

Get a data use agreement from the individual team members.

Provide the report based on role and include data encryption.

QUESTION 47
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 control group for the phrases

A summary of the KPIs

Filter buttons for the status

The date when the report was last accessed

The time period the report covers

The date on which the report was run

CompTIA DA0-001, also known as the CompTIA Data+ Certification Exam, is a vendor-neutral certification exam designed to validate the skills and knowledge of a data professional. DA0-001 exam is ideal for individuals who are looking to establish a career in the field of data analytics, management, and processing. It is also suitable for those who are already working in the industry and want to enhance their skills and knowledge.

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