Fundamentals Of Data Warehousing Quiz!
In the world of computers, a data warehouse is a system used for reporting and data testing, and it plays a role in business intelligence. It is uploaded from the operational plan, such as marketing or sales. The data may go through the operational data storage and may require data cleansing. The data is cleansed and made available for professional use. Don’t neglect to retrieve your certificate when you have completed this quiz.
Questions and Answers
- 1.
What type of schema?
- A.
Star Schema
- B.
Snowflakes Schema
- C.
Skyflakes schema
Correct Answer
A. Star SchemaExplanation
A star schema is a type of database schema where a central fact table is connected to multiple dimension tables. The fact table contains the measures or metrics of interest, while the dimension tables provide additional context or attributes for analyzing the data. This type of schema is commonly used in data warehousing and allows for efficient querying and analysis of large datasets.Rate this question:
-
- 2.
On Table 2, what type of table?
- A.
Fact Table
- B.
Dimension Table
- C.
Factual Table
- D.
Dimensional Table
Correct Answer
A. Fact TableExplanation
The correct answer is "Fact Table" because a fact table is a central table in a star schema or snowflake schema of a data warehouse. It contains the measurements or metrics of a business process, and is typically surrounded by dimension tables which provide context to the data in the fact table.Rate this question:
-
- 3.
On Table 1, what type of table?
- A.
Fact Table
- B.
Dimension Table
- C.
Factual Table
- D.
Dimensional Table
Correct Answer
B. Dimension TableExplanation
The correct answer is "Dimension Table" because a dimension table in a database contains descriptive attributes that provide context to the data in a fact table. It typically contains information about the dimensions or categories that the data is being analyzed by, such as time, location, or product. In this case, Table 1 is referred to as a "dimension table," indicating that it contains descriptive attributes rather than the actual data being analyzed.Rate this question:
-
- 4.
What does the lines mean?
- A.
Relationship
- B.
Connectors
- C.
Process
- D.
Network
Correct Answer
A. RelationshipExplanation
The lines likely refer to different concepts or categories, such as "relationship," "connectors," "process," and "network." Each of these terms represents a distinct idea or topic. The lines could be indicating that these concepts are related or connected in some way, but without further context, it is difficult to determine the exact meaning.Rate this question:
-
- 5.
When does ETL happens?
- A.
2,3,4,5
- B.
6, 7, 8
- C.
11
- D.
12
Correct Answer
B. 6, 7, 8Explanation
ETL (Extract, Transform, Load) typically occurs during the time period of 6, 7, and 8. This is when data is extracted from various sources, transformed into a suitable format, and loaded into a target system or database. The given answer suggests that the ETL process takes place during this specific timeframe, implying that it is the correct time for ETL to occur.Rate this question:
-
- 6.
Where is the datawarehouse?
- A.
2
- B.
8
- C.
11
- D.
14
Correct Answer
C. 11 -
- 7.
Where are the source data?
- A.
4
- B.
2
- C.
7
- D.
13
Correct Answer(s)
A. 4
B. 2Explanation
The source data is located in the numbers 4, 2, 7, and 13.Rate this question:
-
- 8.
What is item 12?
- A.
Prescriptive Analytics
- B.
ETL
- C.
Source Data
Correct Answer
A. Prescriptive AnalyticsExplanation
Prescriptive Analytics refers to the use of data and algorithms to determine the best course of action or decision in a given situation. Item 12 is most likely referring to a specific aspect or component of Prescriptive Analytics. However, without further context or information, it is not possible to provide a more specific explanation.Rate this question:
-
- 9.
Involves historical processing of information.
- A.
OLTP
- B.
OLAP
Correct Answer
B. OLAPExplanation
OLAP stands for Online Analytical Processing, which involves the historical processing of information. Unlike OLTP (Online Transactional Processing), which focuses on real-time transactional data, OLAP is designed to analyze large volumes of historical data to support business intelligence and decision-making processes. OLAP systems typically use multidimensional data models and provide capabilities for complex data analysis, such as data mining, forecasting, and trend analysis. Therefore, the answer is OLAP.Rate this question:
-
- 10.
Involves day-to-day processing.
- A.
OLTP
- B.
OLAP
Correct Answer
A. OLTPExplanation
OLTP stands for Online Transaction Processing. It involves day-to-day processing of transactions in real-time. OLTP systems are designed to handle high volumes of transactions and provide quick response times. They are commonly used in applications such as banking, e-commerce, and order processing, where there is a need for immediate and accurate data processing. OLTP systems are optimized for transactional operations, focusing on data integrity, concurrency control, and fast data retrieval. In contrast, OLAP (Online Analytical Processing) is used for complex data analysis and reporting, involving historical and aggregated data.Rate this question:
-
- 11.
Used by clerks, DBAs, or database professionals.
- A.
OLTP
- B.
OLAP
Correct Answer
A. OLTPExplanation
OLTP stands for Online Transaction Processing, which is a type of database system primarily used by clerks, DBAs, or database professionals. It is designed to handle and process real-time transactions and queries efficiently. OLTP databases are optimized for fast data retrieval, insertion, and updates, making them suitable for applications that require quick and frequent access to data, such as point-of-sale systems or online banking. On the other hand, OLAP (Online Analytical Processing) is used for complex data analysis and reporting purposes, involving large volumes of data.Rate this question:
-
- 12.
Useful in running the business.
- A.
OLTP
- B.
OLAP
Correct Answer
A. OLTPExplanation
OLTP stands for Online Transaction Processing, which is a type of database system that is designed to handle and process real-time transactional data. It is useful in running a business because it allows for efficient and quick processing of day-to-day transactions, such as sales, orders, and inventory management. OLTP systems are optimized for high-speed data input and retrieval, ensuring that businesses can operate smoothly and effectively in real-time.Rate this question:
-
- 13.
Useful in analyzing the business.
- A.
OLAP
- B.
OLTP
Correct Answer
A. OLAPExplanation
OLAP stands for Online Analytical Processing, which is a technology used for analyzing and reporting data from multiple dimensions. It allows users to perform complex queries and generate reports that provide insights into business performance. OLAP is particularly useful in analyzing the business because it enables users to explore data from different perspectives, such as sales, marketing, and finance, and uncover trends, patterns, and relationships. By providing a multidimensional view of data, OLAP helps organizations make informed decisions and improve their overall business strategy.Rate this question:
-
- 14.
Where does cube and marts created?
- A.
11
- B.
1
- C.
12
- D.
2
Correct Answer
A. 11 -
- 15.
It focuses on Information out.
- A.
OLTP
- B.
OLAP
Correct Answer
B. OLAPExplanation
OLAP stands for Online Analytical Processing. It is a technology that focuses on analyzing and processing large volumes of data from multiple sources to provide insights and support decision-making. Unlike OLTP (Online Transaction Processing), which is designed for transactional processing and data entry, OLAP is specifically designed for complex queries and reporting. It allows users to extract and analyze data from different dimensions, such as time, geography, and product, to gain a deeper understanding of business performance and trends. Therefore, the answer "OLAP" is correct because it aligns with the statement that it focuses on information out.Rate this question:
-
- 16.
It focuses on Data in.
- A.
OLTP
- B.
OLAP
Correct Answer
A. OLTPExplanation
OLTP stands for Online Transaction Processing, which is a type of database system that focuses on processing and managing real-time transactional data. It is designed for day-to-day operations where data is constantly being added, updated, or deleted. OLTP systems are optimized for high-speed data processing, ensuring quick response times for individual transactions. Therefore, the statement "It focuses on Data in" is most applicable to OLTP systems, as they primarily deal with incoming data and immediate processing. On the other hand, OLAP (Online Analytical Processing) focuses on analyzing large volumes of historical data for decision-making purposes.Rate this question:
-
- 17.
Based on Star Schema, Snowflake, Schema and Fact Constellation Schema.
- A.
OLTP
- B.
OLAP
Correct Answer
B. OLAPExplanation
Based on the given options of Star Schema, Snowflake Schema, and Fact Constellation Schema, the correct answer of "OLAP" can be inferred. OLAP stands for Online Analytical Processing, which is a data processing approach used for complex analytical queries and reporting. It is typically used in data warehousing, where data is structured in a multidimensional model. In contrast, OLTP (Online Transactional Processing) is used for transactional processing of day-to-day operations. Since the question is asking about the schema types related to OLAP, the correct answer is OLAP.Rate this question:
-
- 18.
Data mart are not flexible.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
Data marts are actually designed to be flexible. They are subsets of data warehouses that are created for specific departments or business functions. Data marts are built to meet the specific needs of the users, allowing for a more focused and efficient analysis of data. They are designed to be easily customizable and adaptable to changing requirements. Therefore, the statement that data marts are not flexible is incorrect.Rate this question:
-
- 19.
A data warehouse also helps in bringing down the costs by tracking trends, patterns over a long period in a consistent and reliable manner.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
A data warehouse is designed to store and analyze large amounts of data over a long period of time. By tracking trends and patterns, it allows businesses to make informed decisions and predictions based on historical data. This helps in reducing costs as it provides a consistent and reliable source of information for identifying cost-saving opportunities and optimizing business processes. Therefore, the statement is true.Rate this question:
-
- 20.
Data extraction takes data from the source systems.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Data extraction is the process of retrieving data from various source systems, such as databases, files, or APIs. It involves gathering the required data and transforming it into a format that can be used for analysis, reporting, or other purposes. Therefore, the statement "Data extraction takes data from the source systems" is correct, as it accurately describes the purpose and function of data extraction.Rate this question:
-
- 21.
Is a subject-oriented, integrated, time-variant, and non-volatile collection of data. This data helps analysts to take informed decisions in an organization.
- A.
Data Marts
- B.
Data Warehouse
- C.
Data Cubes
- D.
Data Analytics
Correct Answer
B. Data WarehouseExplanation
A data warehouse is a subject-oriented, integrated, time-variant, and non-volatile collection of data. It is designed to support the analytical needs of an organization by providing a centralized repository of data from various sources. Analysts can use this data to gain insights and make informed decisions. Data marts, data cubes, and data analytics are related concepts but do not encompass all the characteristics of a data warehouse.Rate this question:
-
- 22.
Is constructed by integrating data from multiple heterogeneous sources. It supports analytical reporting, structured and/or ad hoc queries, and decision making. This tutorial adopts a step-by-step approach to explain all the necessary concepts of data warehousing.
- A.
Data Marts
- B.
Data Warehouse
- C.
Data Cubes
- D.
Data Science
Correct Answer
B. Data WarehouseExplanation
A data warehouse is a central repository of integrated data from multiple sources, which is designed to support analytical reporting, structured and ad hoc queries, and decision making. It is a large-scale database that stores historical and current data in a structured and optimized format, making it easier for users to access and analyze the data. A data warehouse is different from data marts, which are smaller subsets of a data warehouse that focus on specific business areas or departments. Data cubes, on the other hand, are multidimensional structures used for analyzing data in a data warehouse. Data science refers to the field of study that involves extracting insights and knowledge from data using various techniques and tools.Rate this question:
-
- 23.
Data warehouse systems help in the integration of a diversity of application systems.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Data warehouse systems are designed to consolidate data from various sources, including different application systems. By integrating data from multiple application systems into a central repository, data warehouse systems provide a unified view of the organization's data. This integration allows for better analysis and reporting capabilities, as well as improved decision-making. Therefore, the statement that data warehouse systems help in the integration of a diversity of application systems is true.Rate this question:
-
- 24.
There is no frequent updating done in a data warehouse.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
A data warehouse is designed to store large amounts of data for analysis and reporting purposes. Unlike operational databases, data warehouses are not frequently updated with real-time data. Instead, they are typically updated on a regular basis, such as daily or weekly, to ensure that the data remains consistent and accurate. This is because the focus of a data warehouse is on historical data and trends rather than immediate changes. Therefore, the statement "There is no frequent updating done in a data warehouse" is true.Rate this question:
-
- 25.
Data smarts help executives to organize, understand, and use their data to make strategic decisions.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
Data smarts do not help executives to organize, understand, and use their data to make strategic decisions.Rate this question:
-
- 26.
What does "E" means in ETL?
Correct Answer
Extract, Extracted, Extracting, ExtractionExplanation
The "E" in ETL stands for "Extract" which refers to the process of extracting data from various sources such as databases, files, or APIs. This step involves gathering the required data and transferring it to a staging area for further processing. Additionally, "Extracted" and "Extracting" are verb forms that indicate the action of extracting data, while "Extraction" is the noun form that represents the overall process of extracting data.Rate this question:
- 27.
What does "T" in ETL means?
Correct Answer
Transform, Transformed, Transforming, TransformationExplanation
The "T" in ETL stands for "Transform." In the context of ETL (Extract, Transform, Load), the "Transform" phase refers to the process of converting and manipulating data from its original format into a format that is suitable for analysis and storage. This phase involves applying various operations, such as cleaning, filtering, aggregating, and joining, to the extracted data. The terms "Transformed," "Transforming," and "Transformation" are related to this process of data transformation.Rate this question:
- 28.
What does "L" in ETL means?
Correct Answer
Load, Loaded, LoadingExplanation
The "L" in ETL stands for Load, Loaded, and Loading. ETL is an acronym for Extract, Transform, and Load, which refers to the process of extracting data from various sources, transforming it into a consistent format, and then loading it into a target database or data warehouse. The "Load" phase specifically involves loading the transformed data into the target system for further analysis and reporting.Rate this question:
- 29.
Data Warehouse is not needed in Data Analytics?
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
False. A data warehouse is crucial in data analytics. It serves as a centralized repository that stores large amounts of structured and historical data from various sources. Data analytics involves extracting insights and patterns from this data to make informed business decisions. Without a data warehouse, it would be challenging to access, integrate, and analyze data efficiently. The data warehouse provides a structured and optimized environment for data analytics processes, enabling organizations to perform complex queries, generate reports, and gain valuable insights from their data.Rate this question:
-
Back to top