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

質問 1

A county in Illinois is conducting a survey to determine the mean annual income per household. The county is
427sq mi (2.65q km). Which of the following sampling methods would MOST likely result in a representative sample?

（A）Surveys sent to 100 randomly selected homes that are reflective of the population

（B）A systematic survey that is sent to 100 single-family homes in the county

（C）Surveys sent to ten randomly selected homes within 5mi (8km) of the county's office

（D）A stratified phone survey of 100 people that is conducted between 2:00 p.m. and 3:00 p.m.

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 2

What subset of Structured Query Language (SQL) is used to add, remove, modify, or retrieve the information stored within a relational database?

（A）DSL.

（B）DML.

（C）DQL.

（D）DDL.

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 3

Daniel is using the structured Query language to work with data stored in relational database.
He would like to add several new rows to a database table.
What command should he use?

（A）UPDATE.

（B）INSERT.

（C）ALTER.

（D）SELECT.

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 4

What analytics suite is offered by Microsoft and directly integrates with SQL Server Databases?

（A）Dataroma.

（B）Domo.

（C）Power BI.

（D）Qlik.

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 5

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?

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

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

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

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

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 6

A business intelligence team wants to create a new dashboard in order to solve a problem statement. Which of the following is the correct order of steps the team should take?

（A）Find data sources, determine business needs, validate the data, create a mock-up. and analyze the information.

（B）Validate the data, find data sources, analyze the information, and determine business needs.

（C）Determine business needs, find data sources, validate the data, create a mock-up, and analyze the information.

（D）Create a mock-up, validate the data, analyze the information, determine business needs, and find data sources.

正解：D 解答を投票する

質問 7

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

（A）Trend analysis.

（B）Performance analysis.

（C）Outlier analysis.

（D）Predictive analysis.

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 8

Which of the following data manipulation techniques should an analyst use to hide unnecessary data during analysis?

（A）Indexing

（B）Sorting

（C）Parametrization

（D）Filtering

正解：D 解答を投票する

質問 9

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?

（A）Mode

（B）Mean

（C）Median

（D）Standard deviation

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 10

A data analyst is compiling a report that a Chief Executive Officer needs for an impromptu meeting. The report should include information on the previous day's performance. Which of the following reports should the analyst provide?

（A）Dynamic

（B）Ad hoc

（C）Recurring

（D）Tactical

正解：B 解答を投票する

質問 11

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

（A）XSS

（B）ETL

（C）ELT

（D）APIs

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

Which of the following differentiates a flat text file from other data types?

（A）Data is defined with key-value pairs.

（B）Data is housed in a markup language.

（C）Data is stored in defined rows.

（D）Data is separated by a delimiter.

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 13

The current date is July 14, 2020. A data analyst has been asked to create a report that shows the company's year-over-year Q2 2020 sales. Which of the following reports should the analyst compare?

（A）YTD 2020 and YTD 2019

（B）Q2 2020 and Q2 2019

（C）A Q2 2020 and Q4 2019

（D）Q2 2020 and Q2 2021

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

After completing web scraping, which of the following file formats needs to be parsed?

（A）.txt

（B）.csv

（C）.tsv

（D）.html

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)

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

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