View All DA0-001 Actual Exam Questions, Answers and Explanations for Free [Q69-Q92]

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View All DA0-001 Actual Exam Questions, Answers and Explanations for Free

DA0-001 Exam Free Practice Test with100% Accurate Answers

QUESTION 69
A JSON file is an example of:

structured data.

web data.

machine data.

processed data.

QUESTION 70
A database administrator is required to mask certain table columns containing Pll in order to comply with the company privacy policy. Which of the following are the most likely types of information the administrator should mask? (Select two).

Government-issued ID

Address

Order ID

Order date

Customer ID

Referral number

QUESTION 71
Which of the following is the best reason to use database views instead of tables?

Views reduce the need for repetitive, complex data joins.

Views allow for the storage of temporary data, whereas tables do not.

Views allow for the joining of multiple data sources, whereas tables do not.

Views can be used to restrict anonymous sensitive information.

QUESTION 72
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.

QUESTION 73
An analyst runs a report on a daily basis, and the number of datapoints must be validated before the data can be analyzed. The number of datapoints increases each day by approximately 20% of the total number from the day before. On a given day, the number of datapoints was 8,798. Which of the following should be the total number of datapoints on the next day?

7,038

9,600

10,600

10,800

QUESTION 74
Which one of the following in NOT a common data integration tool?

XSS

ELT

ETL

APIs

QUESTION 75
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.

QUESTION 76
You are working with a dataset and need to swap the values in rows with those in columns.
What action do you need to perform?

Recording

Filtering.

Aggregation.

Transposition.

QUESTION 77
Which of the following best describes a 95% confidence interval?

There is a 95% probability that a sample is within one standard deviation of the mean.

A stated range may contain 95% of the population mean, 95% of the time.

A set of ranges contains the population mean with 95% certainty.

A range contains 95% of the population mean.

QUESTION 78
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 chat using the site and percentage of new customers data.

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

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.

QUESTION 79
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

QUESTION 80
Which of the following contains alphanumeric values?

10.1²

13.6

1347

A3J7

QUESTION 81
A data analyst is working for a shipping company and calculating the volume of boxes according to the following formula: volume = height × width × depth. Which of the following variable types describes volume?

Derived

Normalized

Concatenated

Aggregated

QUESTION 82
Which of the following is a common data analytics tool that is also used as an interpreted, high-level, general-purpose programming language?

SAS

Microsoft Power B1

IBM SPSS

Python

QUESTION 83
Melissa wants to explore central tendency in her dataset.
Which statistic best matches her need?

Interquartile range.

Range.

Median.

Standard deviation.

QUESTION 84
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 85
An analyst needs to provide a chart to identify the composition between the categories of the survey response data set:

Which of the following charts would be BEST to use?

Histogram

Pie

Line

Scatter pot

Waterfall

QUESTION 86
A data analyst is developing a dashboard to track and monitor metrics. Which of the following best practices should be taken into during the FIRST pment process?

Create a A Aupirarrame:

Deploy to production.

Copy a dashboard design from the Internet.

Develop a dashboard.

QUESTION 87
A development company is constructing a new Init 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 Init?

$640,900

$690,000

$705,200

$702,500

QUESTION 88
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

QUESTION 89
A JSON file is an example of:

structured data.

web data.

machine data.

processed data.

QUESTION 90
You would like to know whether the mean height of a group of children is statistically significantly different from that of another group.
What statistical test would be most appropriate?

Chi-square test

t-test

Sigma test

p-test

QUESTION 91
Emma is working in a data warehouse and finds a finance fact table links to an organization dimension, which in turn links to a currency dimension that not linked to the fact table.
What type of design pattern is the data warehouse using?

Star.

Sun.

Snowflake.

Comet.

QUESTION 92
Given the image below:

The data should be cleaned because of the presence of: