Informatica is a largely used ETL (Extraction, Transformation and Loading) tool for building enterprise data warehouses. Informatica helps in extracting data from the sources like flat files and available databases. It does not store and just moves the data from one place to another. It also transforms the data as per business needs from all the databases. After transforming, Informatica loads the transformed data into the designated data warehouse. You can also see the consolidated data after loading by querying it.
This data integration software is an essential tool to maintain any information’s lifespan. It is one of the best technologies available which is cost-effective and efficient. It improves the performance of the most critical assets and provides a very high level of user satisfaction. Informatica is developed on the ETL architecture format and has a very high level of demand in the business sectors. You can train yourself by learning Informatica and boost your career.
It is natural to seek minute details before you decide to choose a career path. Therefore, various related Informatica interview questions are answered below. These will help you to have a clear picture regarding this ETL tool.
- The most basic question is, what is an Enterprise Data Warehouse?
An enterprise data warehouse is to create an organization of all the available data in a single source store. This will give all your organized data a global view and you can periodically analyse or modify the data through a single point access.
- Other relative terms with Data Warehouse are Database and Data Mart. How are these three different?
A database consists of homogenous data arranged in a specific way. A data warehouse consists of various types of data which are larger than the database. Data Mart comprises of heterogeneous types of data covering the various facets of an organization.
- What is a single point access?
The single point access is popularly called as the domain. Domains are single organization points which handle all the interconnected nodes and relationships of the entire organization’s data.
- How does Informatica work?
Informatica works through enabling of servers. All the instructions which need to be implemented are compiled in a workflow. The workflow dictates methods to the server and makes it work accordingly.
- How is a repository server different from a powerhouse server?
A repository server help to maintain the uniformity and coherence of the repository by controlling the charts, tables, etc. whereas the powerhouse server helps in effective management of different operations among the components of the database repository.
- How many repositories can be created?
Informatica permits you to create multiple repositories based on the availability of the ports.
- How do you convert a data from source to target?
You can do this by implementing sessions. A session is like an instructional set which will help you in converting the data from the source to the target directly.
- What is a batch?
Execution of sessions can be combined in serial or parallel formats by creating a batch.
- Is there any limit?
You can combine any number of sessions you want in a batch. However, having a lesser number will ease the migration process.
By learning this effective tool, you can shape your career in a wonderful way.