Question 1

A(n)_____ is used to pull data from disparate data sources to populate and maintain a data warehouse.

Accepted Answer

An extract-transform-load (ETL) process is typically used to pull data from different sources, transform it to be compatible with the data warehouse schema, and then load it into the data warehouse. This process is essential for maintaining accurate and up-to-date information in the data warehouse.

Question 2

A _____ is a database that stores large amounts of historical data in a form that readily supports analysis and management decision making in an organization.

Accepted Answer

A data warehouse is designed to store and manage large amounts of historical data in a way that allows for analysis and decision making. It is specifically designed to support business intelligence and data analytics, and typically uses a specific data modeling approach known as a dimensional model. The other choices, data structure, data profile, and data guard, do not accurately describe a database designed for this purpose.

Question 3

Which of the following steps in an extract-transform-load (ETL)process creates an updated version of a data warehouse?

Accepted Answer

The Load step in an ETL process is responsible for updating the data warehouse with the transformed and extracted data from various sources. This step ensures that the data warehouse always contains the latest and most accurate data.

Question 4

Zomi,a fashion outlet,wishes to delete the details of orders that cost less than $30.Which of the following steps in the extract-transform-load (ETL)process is used to accomplish this task?

Accepted Answer

The answer of Zomi,a fashion outlet,wishes to delete the details...

Question 5

Which of the following best describes the relational database model?

Accepted Answer

The relational database model helps organize structured data into collections of two-dimensional tables, consisting of rows and columns. The tables are related to each other based on common attributes or fields, which enables the retrieval and manipulation of data in a structured and efficient manner.

Question 6

The effectiveness of a(n)_____ process is essential to ensure the success of a data warehouse.

Accepted Answer

The extract-transform-load (ETL) process is used to extract data from various sources, transform it to fit the data warehouse schema, and load it into the data warehouse. It is a fundamental process for data warehousing and is essential for the success of the project. Visual Basic is a programming language, chamfering is a manufacturing process, and actuating refers to the action of causing a device to perform its function.

Question 7

Which of the following is true of a data mart?

Accepted Answer

A data mart is a smaller and more specialized version of a data warehouse, focused on a particular department or subject area within an organization. It contains only a subset of the data stored in the full data warehouse and is designed to support specific business functions or users. Therefore, option C is the correct choice. Option A and B are incorrect as they both refer to an extended version of a data warehouse or big data, respectively. Option D is incorrect as Hadoop is a framework for big data processing and storage, not a data mart.

Question 8

Which of the following best describes an extract-transform-load (ETL)process?

Accepted Answer

ETL is a process used to extract data from various sources, transform it into a format that is suitable for analysis, and load it into a data warehouse for further processing. It is commonly used to merge data from different databases or applications into a single, coherent data store.

Question 9

Which of the following is a minor version of a data warehouse that is scaled down to meet the specific needs of a business unit?

Accepted Answer

A data mart is a smaller, more focused version of a data warehouse that is designed to meet the specific needs of a particular business unit or department within an organization. It contains a subset of the data found in a data warehouse and is optimized for easy access and analysis by the individuals who need it. Data cart, data wallet, and data set are not commonly used terms in the context of data warehousing.

Question 10

_____ includes a wide range of applications,practices,and technologies for the extraction,transformation,integration,analysis,interpretation,and presentation of data to support improved decision making.

Accepted Answer

The description provided matches the definition of business intelligence, which is a process that involves using various tools and techniques to turn raw data into meaningful information that can be used for decision making. Artificial intelligence refers to the simulation of human intelligence in machines, while prescriptive analytics involves using analytical and computational methods to make recommendations about future actions. Artificial analytics is not a commonly used term and does not have a clear definition.

Question 11

PHQ,a graphics firm,decides to filter its employees according to their dates of joining.Which of the following steps in the extract-transform-load (ETL)process should be taken by the firm to accomplish the task?

Accepted Answer

Extract is the first step in the ETL process, where data is extracted from various sources. In this case, PHQ needs to extract employee data, including their dates of joining, from their existing systems.

Question 12

Which of the following steps in an extract-transform-load (ETL)process updates an existing data warehouse with the data obtained from the extract and transform steps?

Accepted Answer

The "Load" step in the ETL process is responsible for updating an existing data warehouse with the data obtained from the extract and transform steps. This step involves loading the transformed data into the appropriate tables in the data warehouse.

Question 13

Which of the following represents the attribute of an entity in a relational database model?

Accepted Answer

In a relational database model, an entity is represented as a table, and each attribute of the entity is represented as a column in that table. Therefore, A) a column represents the attribute of an entity in a relational database model. B) a row represents a record or instance of that entity, C) cardinality represents the relationship between two entities, and D) a tuple represents a combination of attributes or fields that make up a record or data point.

Question 14

Which of the following represents an entity in a relational database model?

Accepted Answer

In a relational database model, an entity is represented by a table, where each row represents an instance of the entity and each column represents an attribute of that entity. Therefore, the correct choice is B, a row, which represents an instance of an entity.

Question 15

Which of the following steps in an extract-transform-load (ETL)process draws desired data from various data sources to update a data warehouse?

Accepted Answer

The Extract step in an ETL process involves pulling or extracting the desired data from various data sources, which is the initial step in updating a data warehouse.

Question 16

Which of the following is a special-purpose programming language used for accessing and manipulating data stored in a relational database?

Accepted Answer

SQL (Structured Query Language) is a special-purpose language designed specifically for managing and manipulating data stored in relational databases. It is used to create, modify, and manage databases, as well as to retrieve and manipulate data within them. FORTRAN, JAVA, and COBOL are general-purpose programming languages and are not specifically designed for use with relational databases.

Question 17

_____ tools frequently operate on data stored in a data warehouse or data mart.

Accepted Answer

Business intelligence tools are designed to analyze data from various sources, including data warehouses and data marts, to help organizations make more informed business decisions. Hadoop is a distributed computing framework used for processing large data sets, prescriptive analytics are a type of advanced analytics focused on recommending optimal solutions, and ransomware is a type of malicious software used to extort money from victims.

Question 18

Which of the following is a term used to describe data collections that are so enormous and complex that traditional data management software and analysis processes are incapable of dealing with them?

Accepted Answer

Big data refers to extremely large and complex datasets that cannot be processed using traditional data management and analysis tools. This includes analyzing and processing data from various sources such as social media, sensors, and other unstructured data sets that require advanced technologies such as machine learning and artificial intelligence for analysis. Data marts and data warehouses are different concepts related to storing and organizing data for analysis purposes, but do not necessarily reflect the size or complexity of the data itself. 'Big cell' is not a recognized term in the field of data management and analysis.

Question 19

The ACID (atomicity,consistency,isolation,and durability)properties of SQL databases ensure _____.

Accepted Answer

The ACID properties of SQL databases ensure data integrity, meaning that the data is accurate, consistent, and trustworthy. Atomicity ensures that a transaction is treated as a single "unit" that is either completed in its entirety or not at all. Consistency ensures that the database remains in a consistent state before and after any transaction. Isolation ensures that multiple transactions can occur simultaneously without interfering with each other. Durability ensures that once a transaction is committed, it will remain in the database even in the event of a failure. Together, these properties ensure that the database remains reliable and consistent.

Question 20

In an extract-transform-load (ETL)process,the mined data used to update a data warehouse is converted to a different format in the _____ step.

Accepted Answer

In the ETL process, the transform step is where the mined data is converted to a different format so that it can be loaded into the data warehouse. The extract step involves extracting the data from various sources, while the load step involves loading the transformed data into the data warehouse. There is no step called "autorun" in the ETL process.

Quiz 9: Business Intelligence and Big Data

A(n) _____ is used to pull data from disparate data sources to populate and maintain a data warehouse.

A _____ is a database that stores large amounts of historical data in a form that readily supports analysis and management decision making in an organization.

Which of the following steps in an extract-transform-load (ETL) process creates an updated version of a data warehouse?

Zomi,a fashion outlet,wishes to delete the details of orders that cost less than $30.Which of the following steps in the extract-transform-load (ETL) process is used to accomplish this task?

Which of the following best describes the relational database model?

The effectiveness of a(n) _____ process is essential to ensure the success of a data warehouse.

Which of the following is true of a data mart?

Which of the following best describes an extract-transform-load (ETL) process?

Which of the following is a minor version of a data warehouse that is scaled down to meet the specific needs of a business unit?

_____ includes a wide range of applications,practices,and technologies for the extraction,transformation,integration,analysis,interpretation,and presentation of data to support improved decision making.

PHQ,a graphics firm,decides to filter its employees according to their dates of joining.Which of the following steps in the extract-transform-load (ETL) process should be taken by the firm to accomplish the task?

Which of the following steps in an extract-transform-load (ETL) process updates an existing data warehouse with the data obtained from the extract and transform steps?

Which of the following represents the attribute of an entity in a relational database model?

Which of the following represents an entity in a relational database model?

Which of the following steps in an extract-transform-load (ETL) process draws desired data from various data sources to update a data warehouse?

Which of the following is a special-purpose programming language used for accessing and manipulating data stored in a relational database?

_____ tools frequently operate on data stored in a data warehouse or data mart.

Which of the following is a term used to describe data collections that are so enormous and complex that traditional data management software and analysis processes are incapable of dealing with them?

The ACID (atomicity,consistency,isolation,and durability) properties of SQL databases ensure _____.

In an extract-transform-load (ETL) process,the mined data used to update a data warehouse is converted to a different format in the _____ step.