Informatica PowerCenter Repository

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Questions and Answers

What is a data warehouse?

A collection of databases used for online transaction processing (OLTP)

A centralized repository of integrated data from one or more disparate sources (correct)

All the above

A tool for data mining and predictive analytics

What is the main goal of data warehousing?

To streamline data entry and improve data quality

To perform transaction processing in real-time

To store historical data for reporting and analysis (correct)

All the above

What are the special columns in sequence generator transformation?

Nextval,Fwdval

Nextval,Currval (correct)

Oneval,twoval

No such columns

What is the PowerCenter repository?

A relational database managed by the Repository Service Signup and view all the answers

What is a Domain in Informatica?

A group of nodes and services Signup and view all the answers

What is the repository consist of?

Metadata Signup and view all the answers

What is the primary function of the Designer in Informatica PowerCenter Client?

Creating and managing connections to external data sources Signup and view all the answers

What is the main purpose of the Repository Manager in Informatica PowerCenter Client?

Managing metadata, user permissions, and system settings Signup and view all the answers

What is the key difference between a data mart and a data warehouse?

A data mart is designed for a specific business unit or department, while a data warehouse is designed for the entire organization Signup and view all the answers

What is a characteristic of a data warehouse?

Subject-oriented Signup and view all the answers

What is OLAP in data warehousing?

Online Analytical Processing used for reporting and analysis Signup and view all the answers

What is a data mart?

A specialized database designed for a specific business unit or department Signup and view all the answers

What is the primary function of ETL workflows?

To extract, transform, and load data into a data warehouse Signup and view all the answers

What is a key component of the Informatica PowerCenter Client?

Repository Manager Signup and view all the answers

What is the primary purpose of the Power Center Data Loader?

To extract, transform, and load data into a data warehouse Signup and view all the answers

What is a benefit of using a columnar database in data warehousing?

Lower storage requirements Signup and view all the answers

Which of the following is a popular open-source data warehousing platform?

PostgreSQL Signup and view all the answers

What is the default transformation in Informatica that comes with every source?

Source Qualifier Signup and view all the answers

What does OLTP stand for?

Online Transaction Processing Signup and view all the answers

What is the purpose of an ETL tool in data warehousing?

To extract, transform, and load data into a data warehouse Signup and view all the answers

Which of the following is NOT a type of data storage in data warehousing?

None of the above Signup and view all the answers

What type of sources does Informatica support?

All of the above Signup and view all the answers

Study Notes

Data Warehousing

A data warehouse is a centralized repository of integrated data from one or more disparate sources.
The main goal of data warehousing is to store historical data for reporting and analysis.
A data mart is a smaller version of a data warehouse, designed for a specific business unit or department.

Informatica PowerCenter

A subset of a data warehouse is focused on a particular business function or department.
The PowerCenter repository is a relational database managed by the Repository Service.
A Domain in Informatica represents a group of nodes and services.
The Designer in Informatica PowerCenter Client is used for designing and configuring ETL workflows.
The Repository Manager in Informatica PowerCenter Client is used for managing metadata, user permissions, and system settings.
The main components of the Informatica PowerCenter Client are Repository Manager, Workflow Manager, and Workflow Monitor.

Data Warehousing Concepts

OLAP stands for Online Analytical Processing, used for reporting and analysis.
Data warehousing is characterized by being subject-oriented, integrated, and historical.
OLTP stands for Online Transaction Processing, used for real-time data entry and processing.
A columnar database is beneficial for data warehousing due to its lower storage requirements.

Data Storage and Sources

Informatica supports various data sources, including relational, flat file, XML, and more.
Relational databases, multidimensional databases, and columnar databases are types of data storage in data warehousing.
PostgreSQL is a popular open-source data warehousing platform.

ETL and Transformations

ETL tools are used to extract, transform, and load data into a data warehouse.
The default transformation in Informatica that comes with every source is the Source Qualifier.
Router Transformation, Joiner transformation, and Oracle Essbase are other types of transformations in Informatica.