DA0-001無料問題集「CompTIA Data+ Certification」

質問 1

Which of the following BEST describes standard deviation?

（A）A measure of how data is distributed

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

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

（D）A measure of the amount of dispersion of a set of values

正解：D 解答を投票する

解説: (JPNTest メンバーにのみ表示されます)

質問 2

A development company is constructing a new unit 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 unit?

（A）$705,200

（B）$640,900

（C）$702,500

（D）$690,000

正解：A 解答を投票する

解説: (JPNTest メンバーにのみ表示されます)

質問 3

An analyst is preparing a report that contains weather dat
a. The temperatures are shown in Fahrenheit. but they must be reported in Celsius. Which of the following should the analyst do to fix this issue?

（A）Rescale the data.

（B）Normalize the data.

（C）Standardize the data.

（D）Aggregate the data.

正解：A 解答を投票する

解説: (JPNTest メンバーにのみ表示されます)

質問 4

An analyst is currently working on a ticket to revamp a company-wide dashboard that has been in use for five years. Which of the following should be the first step in the development process?

（A）Build an additional dashboard with fewer views tailored toward each specific team.

（B）Develop a more streamlined dashboard to roll out by the next delivery date.

（C）Make changes to a frequently used report that is already in production.

（D）Talk to the group that made the request to determine the desired goal.

正解：D 解答を投票する

解説: (JPNTest メンバーにのみ表示されます)

質問 5

A data analyst received the information in the table below from a recently completed marketing campaign:

Which of the following is the total order conversion rate?

（A）13.2%

（B）22.3%

（C）14.8%

（D）85.2%

正解：C 解答を投票する

解説: (JPNTest メンバーにのみ表示されます)

質問 6

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

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

（C）Include a pie chat using the site and percentage of new customers data.

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

正解：A 解答を投票する

解説: (JPNTest メンバーにのみ表示されます)

質問 7

Which of the following is an example of a flat file?

（A）JSON file

（B）JPEG file

（C）PDF file

（D）CSV file

正解：D 解答を投票する

解説: (JPNTest メンバーにのみ表示されます)

質問 8

A data analyst reviews the following data set:

Which of the following is the range value?

（A）13

（B）12

（C）10

（D）9

正解：A 解答を投票する

質問 9

An organization would like to add a secondary email field to its customer database in order toenrich the customer profiles. Which of the following data manipulation techniques should the analyst use to add this information?

（A）Aggregate

（B）Merge

（C）Append

（D）Blend

正解：C 解答を投票する

質問 10

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

（A）10.7lbs (4.9kg)

（B）8in (20cm)

（C）5 kids

（D）2.5mi (4km)

正解：C 解答を投票する

質問 11

An analyst is updating a customer contacts database with information obtained from a survey of new customers. Which of the following data manipulation techniques should the analyst use?

（A）Append

（B）Transform

（C）Blend

（D）Join

正解：A 解答を投票する

解説: (JPNTest メンバーにのみ表示されます)

質問 12

Given the following data table:

Which of the following are appropriate reasons to undertake data cleansing? (Select two).

（A）Missing data

（B）Invalid data

（C）Non-parametric data

（D）Duplicate data

（E）Normalized data

（F）Redundant data

正解：A、B 解答を投票する

解説: (JPNTest メンバーにのみ表示されます)

質問 13

A data analyst needs to create a data visualization that aids in un the cumulative impact of sequentially introduced values that are positive or negative. Which of the following data visualization methods should the analyst use?

（A）A bubble chart

（B）A waterfall chart

（C）A scatter plot

（D）A line chart

正解：B 解答を投票する

解説: (JPNTest メンバーにのみ表示されます)

質問 14

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）Duplicate Data.

（B）Redundant Data.

（C）Invalid Data.

（D）Missing Data.

正解：C 解答を投票する

解説: (JPNTest メンバーにのみ表示されます)

質問 15

A data analyst is creating a report that will provide information about various regions, products, and time periods. Which of the following formats would be themost efficient way to deliver this report?

（A）A dashboard with filters at the top that the user can toggle

（B）A static report with a different page for every filtered view

（C）A daily email with snapshots of regional summaries

（D）A workbook with multiple tabs for each region

正解：A 解答を投票する

解説: (JPNTest メンバーにのみ表示されます)

質問 16

A stakeholder wants to see daily sales targets organized in a dashboard by country, state, city, and ZIP Code. Which of the following delivery considerations must a data analyst take into account when creating the dashboard?

（A）Access permissions

（B）Variable formatting

（C）Saved searches

（D）Drill-down capability

正解：D 解答を投票する

質問 17

Given the information in the following tables:

Which of the following describes merging these tables to create a master file that includes all transactions for both online and in-store sales?

（A）Data completeness

（B）Data audit

（C）Data consolidation

（D）Data validation

正解：C 解答を投票する

解説: (JPNTest メンバーにのみ表示されます)

質問 18

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

（A）Java.

（B）R

（C）C++

（D）Python.

正解：B 解答を投票する

DA0-001 無料問題集「CompTIA Data+ Certification」

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