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CompTIA Data+ Certification Exam Sample Questions (Q147-Q152):

NEW QUESTION # 147
An analyst has written the following code:
SELECT *
FROM Cust_table
WHERE age > 60 AND City = "New York"
Which of the following criteria is the analyst retrieving?

A. All customers older than age 60 in New York City
B. All customers younger than age 60 in New York City
C. All customers older than age 60 in New York state
D. All customers aged 60 and older in New York state

Answer: A

NEW QUESTION # 148
A data analyst must separate the column shown below into multiple columns for each component of the name:

Which of the following data manipulation techniques should the analyst perform?

A. Imputing
B. Parsing
C. Transposing
D. Concatenating

Answer: B

Explanation:
Explanation
Parsing is the data manipulation technique that should be used to separate the column into multiple columns for each component of the name. Parsing is the process of breaking down a string of text into smaller units, such as words, symbols, or numbers. Parsing can be used to extract specific information from a text column, such as names, addresses, phone numbers, etc. Parsing can also be used to split a text column into multiple columns based on a delimiter, such as a comma, space, or dash1. In this case, the analyst can use parsing to split the column by the comma delimiter and create three new columns: one for the last name, one for the first name, and one for the middle initial. This will make the data more organized and easier to analyze.

NEW QUESTION # 149
A database consists of one fact table that is composed of multiple dimensions. Each dimension is represented by a denormalized table. This structure is an example of a:

A. star schema.
B. galaxy schema.
C. snowflake schema.
D. non-relational schema.

Answer: A

Explanation:
A star schema is a type of database schema that consists of one fact table and multiple dimension tables. The fact table contains the measures or metrics of the business process, such as sales, orders, or transactions. The dimension tables contain the attributes or characteristics of the business entities, such as products, customers, or locations. The fact table is connected to the dimension tables by foreign keys that reference the primary keys of the dimension tables. The fact table is located at the center of the schema, while the dimension tables are located at the edges, forming a star-like shape1.
A star schema is an example of a denormalized schema, which means that the dimension tables are not normalized and may contain redundant or repeated data. This is done to improve the performance and simplicity of queries, as there are fewer joins and tables involved. A star schema is suitable for data warehouses and business intelligence applications that require fast and efficient data retrieval2.

NEW QUESTION # 150
Given the diagram below:

Which of the following data schemas shown?

A. Key-value pairs
B. Data Lake
C. Relational database
D. Online transactional processing

Answer: C

Explanation:
A relational database is a type of database that organizes data into tables, where each table has a fixed number of columns and a variable number of rows. Each row in a table represents a record or an entity, and each column represents an attribute or a property of that entity. The tables are linked by common fields, called keys, which enable the database to establish relationships between the data. A relational database schema is a diagram that shows the structure and organization of the tables, columns, keys, and constraints in a relational database. The diagram given in the question isan example of a relational database schema, as it shows two tables: "Runs" and "Experiments", with their respective columns, data types, and primary keys. The "Runs" table also has a foreign key that references the "ExperimentId" column in the "Experiments" table, indicating a relationship between the two tables. Therefore, the correct answer is D. References: What is a database schema? | IBM, Database Schema - Javatpoint

NEW QUESTION # 151
A publishing group has requested a dashboard to track submissions before publication. A key requirement is that all changes are tracked, as multiple users will be checking out documents and editing them before submissions are considered final. Which of the following is the BEST way to meet this stakeholder requirement?

A. Display the version number next to each submission on the dashboard.
B. Present a data refresh date at the top of the dashboard.
C. Use permissions to ensure users only see certain versions of the submissions.
D. Confirm the dashboard is adhering to the corporate style guide.

Answer: C

NEW QUESTION # 152
......

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Pass Guaranteed CompTIA - DA0-001 - CompTIA Data+ Certification Exam–Valid Latest Exam Pdf

CompTIA Data+ Certification Exam valid test questions & DA0-001 pdf vce & DA0-001 torrent dumps

CompTIA Data+ Certification Exam Sample Questions (Q147-Q152):

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