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The CompTIA DA0-001 certification is a valuable credential for professionals in the field of data management. It validates the skills and knowledge required to work with data in a secure, efficient, and scalable manner. By passing the DA0-001 exam, candidates can enhance their career prospects and demonstrate their expertise in this critical area of modern business.
The CompTIA DA0-001 certification is vendor-neutral, which means that it is not tied to any specific technology or platform. This makes it an ideal certification for professionals who work in a variety of industries, including healthcare, finance, and government. The certification is also suitable for professionals who work with big data and want to gain a deeper understanding of how to manage and analyze large datasets. The certification exam is designed to test an individual's proficiency in data management, data analysis, and data security, and passing the exam demonstrates a high level of competency in these areas.
NEW QUESTION # 43
Which of the following is a common data analytics tool that is also used as an interpreted, high-level, general-purpose programming language?
- A. Microsoft Power BI
- B. SAS
- C. Python
- D. IBM SPSS
Answer: C
NEW QUESTION # 44
What cybersecurity goal protects an organization's data from unauthorized modification?
- A. Non-repudiation.
- B. Availability.
- C. Integrity.
- D. Confidentiality.
Answer: C
Explanation:
The term data integrity refers to the accuracy and consistency of data. When creating databases, attention needs to be given to data integrity and how to maintain it. A good database will enforce data integrity whenever possible. For example, a user could accidentally try to enter a phone number into a date field.
NEW QUESTION # 45
A data analyst needs to calculate the mean for Q1 sales using the data set below:
Which of the following is the mean?
- A. $2,466.18
- B. $2,667.60
- C. $12,330.88
- D. $3,082.72
Answer: A
NEW QUESTION # 46
What symbol is used for the variance of a population of data?
- A. 0
- B. s
- C. 2x2
- D. 0x2
Answer: D
Explanation:
The sample variance is defined by(15.59)We use the symbol sx2 for a sample variance and the symbol ox2 for a population variance.
NEW QUESTION # 47
An analyst has been tracking company intranet usage and has been asked to create a chat to show the most-used/most-clicked portions of a homepage that contains more than 30 links. Which of the following visualizations would BEST illustrate this information?
- A. Heat map
- B. Infographic
- C. Pie chart
- D. Scatter plot
Answer: A
NEW QUESTION # 48
Mario works with a group of R programmers tasked with copying data from an accounting system into a data warehouse.
In what phase are the group's R skills most relevant?
- A. Extract.
- B. Purge.
- C. Transform.
- D. Load.
Answer: C
NEW QUESTION # 49
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?
- A. 10,600
- B. 10,800
- C. 7,038
- D. 9,600
Answer: C
NEW QUESTION # 50
Which one of the following values will appear first if they are sorted in descending order?
- A. Molly.
- B. Adam.
- C. Xavier.
- D. Aaron.
Answer: C
NEW QUESTION # 51
What type of access permission system is most appropriate for a dashboard?
- A. Role-based.
- B. Rule-based.
- C. Mandatory.
- D. Attribute-based.
Answer: A
NEW QUESTION # 52
You are creating a dashboard that shows the total revenue for your organization broken out by a variety of factors. Which one of these is a measure, rather than a dimension?
- A. Geographic region.
- B. Revenue.
- C. Department.
- D. Month.
Answer: B
NEW QUESTION # 53
You have a database where queries are performing slowly.
Investigating the results, you find that the database is performing a time-consuming table scan.
What action can best improve the query performance?
- A. Adding an index.
- B. Sub setting the records.
- C. Recompiling the query.
- D. Parameterizing the query.
Answer: A
Explanation:
You create an index to optimize performance when searching the table using the Find function and to establish uniqueness of table columns.
Indexing makes columns faster to query by creating pointers to where data is stored within a database. Imagine you want to find a piece of information that is within a large database. To get this information out of the database the computer will look through every row until it finds it.
NEW QUESTION # 54
When analyzing the values of two variables, you decide to convert both variables so they are on a scale of 0 to 1.
What term describes this action?
- A. Aggregation.
- B. Filtering.
- C. Transposition.
- D. Normalization.
Answer: D
Explanation:
Normalization is the process of reorganizing data in a database so that it meets two basic requirements: There is no redundancy of data, all data is stored in only one place. Data dependencies are logical, all related data items are stored together.
Put simply, data normalization ensures that your data looks, reads, and can be utilized the same way across all of the records in your customer database. This is done by standardizing the formats of specific fields and records within your customer database.
NEW QUESTION # 55
Which one of the following tools would not be considered a fully featured analytics suite?
- A. MicroStrategy.
- B. Domo.
- C. Minitab.
- D. Power BI.
Answer: C
Explanation:
Correct answer A. Minitab.
Power BI, Domo, and MicroStrategy are all analytics suites offering features that fill many different needs within the analytics process.
Minitab is a statistical analysis package that lacks many of these capabilities.
NEW QUESTION # 56
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 stratified phone survey of 100 people that is conducted between 2:00 p.m. and 3:00 p.m.
- C. Surveys sent to ten randomly selected homes within 5mi (8km) of the county's office
- D. A systematic survey that is sent to 100 single-family homes in the county
Answer: A
NEW QUESTION # 57
You are a database administrator and you create a precompiled query that is stored on the database server.
What have you created?
- A. Stored procedure.
- B. Function as a service.
- C. Parameterized query.
- D. Query execution plan.
Answer: A
Explanation:
A stored procedure is a set of Structured Query Language (SQL) statements with an assigned name, which are stored in a relational database management system (RDBMS) as a group, so it can be reused and shared by multiple programs.
SQL Server stored procedure is a batch of statements grouped as a logical unit and stored in the database. The stored procedure accepts the parameters and executes the T-SQL statements in the procedure, returns the result set if any.
NEW QUESTION # 58
What is an example of data in transit?
- A. Data on a smartphone.
- B. Data on a hard disk.
- C. Data on a network.
- D. Data in memory on a computer.
Answer: C
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 # 59
What is the maximum number of values that may be assigned to a single key in a key/value store?
- A. 0
- B. No maximum
- C. 1
- D. 2
Answer: B
NEW QUESTION # 60
Which of the following data elements would not normally be stored in binary format?
- A. Photograph.
- B. Geolocation.
- C. Video recording.
- D. Audio recording.
Answer: B
NEW QUESTION # 61
An analyst has been asked to validate data quality. Which of the following are the BEST reasons to validate data for quality control purposes? (Choose two.)
- A. Consistency
- B. Transmission
- C. Integrity
- D. Encryption
- E. Retention
- F. Deletion
Answer: A,C
NEW QUESTION # 62
Encryption is a mechanism for protecting data.
When should encryption be applied to data?
Choose the best answer.
- A. When data is at rest.
- B. When data is at rest or in transit.
- C. When data is at rest, unless you are using local storage.
- D. When data is in transit.
Answer: B
Explanation:
Correct answer B. When data is at rest or in transit.
To provide maximum protection, encrypt data both in transit and at rest.
NEW QUESTION # 63
Data stewards protect the organization from legal violations that may result in costly fines and negative publicity.
- A. False.
- B. True.
Answer: B
NEW QUESTION # 64
A company's marketing department wants to do a promotional campaign next month. A data analyst on the team has been asked to perform customer segmentation, looking at how recently a customer bought product, at what frequency, and at what value. Which of the following types of analysis would this practice be considered?
- A. Gap
- B. Custer
- C. Trend
- D. Prescriptive
Answer: B
NEW QUESTION # 65
Analytics reports should follow corporate style guidelines.
- A. False.
- B. True.
Answer: B
NEW QUESTION # 66
Zip code,____________, and___________ uniquely identify 87% of people in the United States.
- A. first name, last name
- B. phone number, email address
- C. date of birth, gender
- D. gender, first name
Answer: C
NEW QUESTION # 67
You are working with a dataset and want to change the names of categories that you used for different types of books.
What term best describes this action?
- A. Summarizing
- B. Aggregating.
- C. Filtering.
- D. Recording.
Answer: D
NEW QUESTION # 68
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