September 24, 2018

Sreekanth B

Capgemini Pentaho Recently Asked Interview Questions Answers

What Is The Importance Of Metadata In Pentaho?

A metadata model in Pentaho formulates the physical structure of your database into a logical business model. These mappings are stored in a central repository and allow developers and administrators to build business-logical DB tables that are cost effective and optimized. It further simplifies the working of business users allowing them to create formatted reports and dashboards ensuring security to data access.

All in all, metadata model provides an encapsulation around the physical definitions of your database and the logical representation and define relationships between them.

Define Pentaho Reporting Evaluation.?

Pentaho Reporting Evaluation is a particular package of a subset of the Pentaho Reporting capabilities, designed for typical first-phase evaluation activities such as accessing sample data, creating and editing reports, and viewing and interacting with reports.

How To Perform Database Join With Pdi (pentaho Data Integration)?

PDI supports joining of two tables form the same databse using a ‘Table Input’ method, performing the join in SQL only.

On the other hand, for joining two tables in different databases, users implement ‘Database Join’ step. However, in database join, each input row query executes on the target system from the main stream, resulting in lower performance as the number of queries implement on the B increases.

To avoid the above situation, there is yet another option to join rows form two different Table Input steps. You can use ‘Merge Join ‘step, using the SQL query having ‘ORDER BY’ clause. Remember, the rows must be perfectly sorted before implementing merge join.
Capgemini Pentaho Recently Asked Interview Questions Answers
Capgemini Pentaho Recently Asked Interview Questions Answers

Explain How To Sequentialize Transformations?

Since PDI transformations support parallel execution of all the steps/operations, it is impossible to sequentialize transformations in Pentaho. Moreover, to make this happen, users need to change the core architecture, which will actually result in slow processing.

Explain Pentaho Report Designer (prd).?

PRD is a graphic tool to execute report-editing functions and create simple and advanced reports and help users export them in PDF, Excel, HTML and CSV files. PRD consists of Java-based report engine offering data integration, portability and scalability. Thus, it can be embedded in Java web applications and also other application servers like Pentaho BAserver.

Explain The Benefits Of Data Integration.?

The biggest benefit is that integrating data improves consistency and reduces conflicting and erratic data from the DB. Integration of data allows users to fetch exactly what they look for, enabling them utilizeand work with what they collected.

Accurate data extraction, which further facilitates flexible reporting and monitoring of the available volumes of data.

Helps meet deadlines for effective business management.

Track customer’s information and buying behavior to improve traffic and conversions in the future, thus advancing your business performance.

Define Pentaho And Its Usage.?

Revered as one of the most efficient and resourceful data integration tools (DI), Pentaho virtually supports all available data sources and allows scalable data clustering and data mining. It is a light-weight Business Intelligence suite executing Online Analytical Processing (OLAP) services, ETL functions, reports and dashboards creation and other data-analysis and visualization operations.

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