September 3, 2018

Sreekanth B

Genpact Pentaho Recently Asked Interview Questions Answers

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.
Genpact Pentaho Recently Asked Interview Questions Answers
Genpact 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.

Explain The Important Features Of Pentaho.?

Pentaho is capable of creating Advanced Reporting Algorithms regardless of their input and output data format.
It supports various report formats, whether Excel spreadsheets, XMLs, PDF docs, CSV files.
It is a Professionally Certified DI Software rendered by the renowned Pentaho Company headquartered in Florida, United States.
Offers enhanced functionality and in-Hadoop functionality.
Allows dynamic drill down into larger and greater information.
Rapid Interactive response optimization.
Explore and view multidimensional data.

Name Major Applications Comprising Pentaho Bi Project.?

Business Intelligence Platform.
Dashboards and Visualizations.
Data Mining.
Data Analysis.
Data Integration and ETL (also called Kettle).
Data Discovery and Analysis (OLAP).

What Is Mdx And Its Usage?

MDX is an acronym for ‘Multi-Dimensional Expressions,’ the standard query language introduced by Microsoft SQL OLAP Services. MDX is an imperative part of XML for analysis API, which has a different structure than SQL.

A basic MDX query is:

SELECT {[Quantity].[Unit Sales], [Quantity].[Store Sales]} ON COLUMNS,

{[Product].members} ON ROWS

FROM [Sales]

WHERE [Time].[1999].[Q2]

Define Three Major Types Of Data Integration Jobs.?

Transformation Jobs : Used for preparing data and used only when the there is no change in data until transforming of data job is finished.

Provisioning Jobs : Used for transmission/transfer of large volumes of data. Used only when no change is data is allowed unless job transformation and on large provisioning requirement.

Hybrid Jobs : Execute both transformation and provisioning jobs. No limitations for data changes; it can be updates regardless of success/failure. The transforming and provisioning requirements are not large in this case.

Illustrate The Difference Between Transformations And Jobs.?

While transformations refer to shifting and transforming rows from source system to target system, jobs perform high level operations like implementing transformations, file transfer via FTP, sending mails, etc.

Another significant difference is that the transformation allows parallel execution whereas jobs implement steps in order.

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