DA0-001 Training & Certification Get Latest CompTIA Data+ Updated on Sep 28, 2022
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NEW QUESTION 70
What is an example of data in transit?
- A. Data on a smartphone.
- B. Data on a network.
- C. Data in memory on a computer.
- D. Data on a hard disk.
Answer: B
Explanation:
A data network is a system designed to transfer data from one network access point to one other or more network access points via data switching, transmission lines, and system controls. Data networks consist of communication systems such as circuit switches, leased lines, and packet switching networks.
NEW QUESTION 71
When would you show time on a standard line chart?
- A. X-axis
- B. Color
- C. Legend
- D. Y-axis
Answer: A
NEW QUESTION 72
Which of the following value is the measure of dispersion "range" between the scores of ten students in a test.
The scores of ten students in a test are 17, 23, 30, 36, 45, 51, 58, 66, 72, 77.
- A. 0
- B. 1
- C. 2
- D. 3
Answer: A
Explanation:
The correct answer is: 60
Range is the interval between the highest and the lowest score.
Range is a measure of variability or scatteredness of the varieties or observations among themselves and does not give an idea about the spread of the observations around some central value.
Symbolically R = Hs - Ls.
Where R = Range; Hs is the 'Highest score' and Ls is the Lowest Score.
The scores of ten students in a test are: 17, 23, 30, 36, 45, 51, 58, 66, 72, 77.
The highest score is 77 and the lowest score is 17.
So the range is the difference between these two scores Range = 77 - 17 = 60
NEW QUESTION 73
Which one of the following programming languages is specifically designed for use in analytics applications?
- A. Python.
- B. R
- C. C++
- D. Java.
Answer: B
NEW QUESTION 74
Which one of the following is not a good example of discrete data type?
- A. Number of children.
- B. Years of experience.
- C. Temperature of a room.
- D. Attendees at a meeting.
Answer: C
NEW QUESTION 75
Consider this dataset showing the retirement age of 11 people, in whole years:
54, 54, 54, 55, 56, 57, 57, 58, 58, 60, 60
This tables show a simple frequency distribution of the retirement age data.
- A. 0
- B. 1
- C. 2
- D. 3
Answer: D
Explanation:
A measure of central tendency (also referred to as measures of centre or central location) is a summary measure that attempts to describe a whole set of data with a single value that represents the middle or centre of its distribution.
There are three main measures of central tendency: the mode, the median and the mean. Each of these measures describes a different indication of the typical or central value in the distribution.
What is the mode?
The mode is the most commonly occurring value in a distribution.
The most commonly occurring value is 54, therefore the mode of this distribution is 54 years.
NEW QUESTION 76
Data definitions should be written in plain language.
- A. True.
- B. False.
Answer: A
NEW QUESTION 77
Taylor wants to investigate how manufacturing, marketing, and sales expenditures impact overall profitability for her company.
Which of the following systems is the most appropriate?
- A. OLTP.
- B. Data mart.
- C. Data warehouse.
- D. OLAP.
Answer: C
Explanation:
A Data mart is too narrow, because Taylor needs data from across multiple divisions.
OLAP is a broad term for analytical processing, and OLTP systems are transactional and not ideal for the task. Since Taylor is working with data across multiple different divisions, she will work with a Data warehouse.
NEW QUESTION 78
Data validation should occur only when data is initially brought into a organization.
- A. False.
- B. True.
Answer: A
NEW QUESTION 79
A data analyst for a media company needs to determine the most popular movie genre. Given the table below:
Which of the following must be done to the Genre column before this task can be completed?
- A. Concatenate
- B. Merge
- C. Append
- D. Delimit
Answer: D
NEW QUESTION 80
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?
- A. t-test
- B. Chi-square test
- C. p-test
- D. Sigma test
Answer: A
NEW QUESTION 81
Analyzing a data point, you find that the point is 1 standard deviation above the mean.
What is the z-score for this data point?
- A. 0
- B. -0.5
- C. 0.5
- D. 1
Answer: A
NEW QUESTION 82
Which of the following roles is responsible for ensuring an organization's data quality, security, privacy, and regulatory compliance?
- A. Data owner.
- B. Data processor.
- C. Data steward.
- D. Data custodian.
Answer: C
Explanation:
Correct answer B. Data steward.
A data steward is responsible for leading an organization's data governance activities, which include data quality, security, privacy, and regulatory compliance.
NEW QUESTION 83
A junior web developer is developing a new application where users can upload short videos. The first task is to create a homepage that shows the headline "Upload Your Short Videos" and a clickable button that says "upload now".
Which of the following HTML commands would help the developer to complete the task successfully?
- A. < hl >Upload Your Short Videos< /h1 >< hl >upload now< /h1 >
- B. < hl >Upload Your Short Videos< /h1 >< button >upload now< /button >
- C. < p >Upload Your Short Videos< /p >< p >upload now< /p >
- D. < span >Upload Your Short Videos< /span >< button >upload now< /button >
Answer: B
Explanation:
The correct answer is: Upload Your Short Videos
upload now
The two tags are used to define HTML headings. defines the most important heading. defines the least important heading.
Note: Only use one per page - this should represent the main heading/subject for the whole page. The tag defines a clickable button.
NEW QUESTION 84
Chris is building a database to store prices for items on a restaurant menu.
What data type is most appropriate for this field?
- A. Date.
- B. Alphanumeric.
- C. Numeric.
- D. Tags.
Answer: C
Explanation:
Prices are numbers stored in dollars and cents; as such, the data type needs to be capable of storing numbers.
NEW QUESTION 85
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?
- A. Population.
- B. Variable.
- C. Sample.
- D. Observation.
Answer: C
Explanation:
Correct answer A. Sample.
Jenny does not have data for the entire population of all undergraduate sophomores. While a specific grade point average is an observation of variable, jenny needs sample data.
NEW QUESTION 86
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.
- A. ETL process.
- B. Record linkage.
- C. System integration.
- D. ELT process.
Answer: B
Explanation:
While this scenario describes a system integration challenge that can be solved with ETL or ELT, Angela is facing a Record linkage issue.
NEW QUESTION 87
What analytics suite is offered by Microsoft and directly integrates with SQL Server Databases?
- A. Dataroma.
- B. Qlik.
- C. Power BI.
- D. Domo.
Answer: C
Explanation:
Power BI is a collection of software services, apps, and connectors that work together to turn your unrelated sources of data into coherent, visually immersive, and interactive insights. Your data may be an Excel spreadsheet, or a collection of cloud-based and on-premises hybrid data warehouses.
NEW QUESTION 88
Which one of the following would not normally be considered a summary statistic?
- A. z-score.
- B. Mean.
- C. Standard deviation.
- D. Variance.
Answer: A
Explanation:
Simply put, a z-score (also called a standard score) gives you an idea of how far from the mean a data point is. But more technically it's a measure of how many standard deviations below or above the population mean a raw score is. A z-score can be placed on a normal distribution curve.
NEW QUESTION 89
What is the median of the following numbers?
13, 2, 65, 3, 5, 4, 7, 3, 4, 7, 8, 2, 4, 4, 60, 23, 43, 2
- A. 0
- B. 1
- C. 2
- D. 4.5
Answer: D
Explanation:
Correct answer B. 4.5
To find the median, sort the numbers in your dataset and find the one located in the middle. In this case, there are an even number of observations, so we take the two middle numbers (4 and 5) and use their average as the median, making the median value 4.5.
The mode is 4, the range is 63, and the number of observations is 18.
NEW QUESTION 90
Amanda needs to create a dashboard that will draw information from many other data sources and present it to business leaders.
Which one of the following tools is least likely to meet her needs?
- A. QuickSight.
- B. SPSS Modeler.
- C. Tableau.
- D. Power BI.
Answer: B
Explanation:
SPSS Modeler.
QuickSight, Tableau, and Power BI are all powerful analytics and reporting tools that can pull data from a variety of sources. SPSS Modeler is a powerful predictive analytics platform that is designed to bring predictive intelligence to decisions made by individuals, groups, systems and your enterprise.
NEW QUESTION 91
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