Pentaho Interview Questions and Answers for freshers - Wikitechy

How to adding the page footer fields in pentaho ?

Editor — Sat, 17 Jul 2021 22:05:24 +0000

The page footer tab is used to present various attributes and functions.
For instance, you can use the page footer tab to print the max value of the age field at the bottom of the page.
The reporting engine permits these features for reporting functions.
The Data tab in the structure pane contains a symbol fx (marked as “1”).
It is the add function button.
Click the button to add different functions into the report.

Then, you will locate a dialog box with different functions segregated into different groups.
To select the maximum age of an employee at the page footer that means Maximum function in the Summary group that is denoted as “1”. Select it and click OK.

How to perform database join with PDI (Pentaho Data Integration) ?

Editor — Sat, 17 Jul 2021 22:03:26 +0000

Database join with PDI

PDI supports combination of two tables form the same database using a ‘Table Input’ method performing the join in SQL only.
On the other side, for joining two tables in different databases, user implement ‘Database Join’ step.
Though in database join, each input row query executes on the target system from the main stream, ensuing in lower performance as the number of queries implement on the B increases.
To avoid the above issues, there is an another option to merge rows form two different Table Input steps.
We can also use ‘Merge Join ‘step, using the SQL query having ‘ORDER BY’ clause. Remember, the rows must be perfectly sorted before implementing merge join.

What are the types of Data Integration Jobs ?

Editor — Sat, 17 Jul 2021 22:02:17 +0000

Types of Data Integration Jobs

The three major types of Data Integration Jobs are:

- Transformation Jobs
- Provisioning Jobs
- Hybrid Jobs

Transformation Jobs:

Used for preparing data and used only when 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 restrictions for data changes; it can be updates of success/failure. The transforming and provisioning needed are not large in this case.

What is the importance of metadata in pentaho ?

Editor — Sat, 17 Jul 2021 21:49:46 +0000

Importance of metadata

Metadata model in pentaho gives an encapsulation about the physical definitions of your database into a logical representation and define relationships between them.
These mappings are stored in a central repository and permits administrators and developers to create business-logical DB tables that are cost effective and optimized.
It simplifies the working of business users permitting them to build formatted reports and dashboards gives security to data access.

What is PDI Architecture ?

Editor — Sat, 17 Jul 2021 21:47:52 +0000

PDI Architecture

PDI consists of several components:

PDI (aka Kettle)
Spoon
Carte
Pan
Kitchen
Encr
Enterprise Edition (EE) Data Integration Server

Learn Pentaho – Pentaho tutorial – PDI Architecture – Pentaho examples – Pentaho programs

PDI (aka Kettle):

All of the tools.
PDI / Kettle is sometimes used to mean Spoon.

Spoon:

Main GUI.
Graphical Job / Transformation designer.
Execute Jobs / Transformations individually.
Monitor slave servers (Carte instances).

Carte:

HTTP server for remote execution of Jobs / Transformations.
Clusters with other Carte instances to distribute Job / Transformation execution.

Pan:

Command line execution of Transformations.

Kitchen:

Command line execution of Jobs.

Encr:

Command line tool for encrypting strings for storage / use by PDI.

Enterprise Edition (EE) Data Integration Server:

Data Integration Engine: Execution of Jobs / Transformations.
Security: integrate with existing security e.g. LDAP or Active Directory.
Scheduling and Monitoring.
Content Management: Managed repository of jobs and transformations.

What is Pentaho Dashboard ?

Editor — Sat, 17 Jul 2021 21:45:49 +0000

Pentaho Dashboard

Dashboards are the group of different information objects on single page such as tables, diagrams and textual content.
The Pentaho AJAX API is used to remove BI information. Pentaho Solution Repository includes the content definitions.
These dashboards provides the users a high-level understanding of how their business is performing.

The steps involved in Dashboard creation include:

Adding dashboard to the solution.
Defining dashboard content.
Implementing filters.
Editing dashboards.

What is Pentaho-chart Report ?

Editor — Sat, 17 Jul 2021 21:44:03 +0000

Pentaho-chart Report

A chart is defined as graphical representation of data or otherwise called a graph.
Pentaho Reporting Designer provides a different types of chart.
We can move a chart using the “chart-element” option contains in the palette of Pentaho Reporting Designer.

There are three requirements to create a chart:

A data-collector to remove the charting-data from the data sources.
A chart-expression to provides a chart from the collected data.
A report element to show the resulting chart object.

What is Pentaho Report types ?

Editor — Sat, 17 Jul 2021 21:42:01 +0000

Pentaho Report types

- Transactional Reports
- Tactical Reports
- Strategic Reports
- Helper Reports

Transactional Reports:

Data to be used from transactions. Objective is to distribute detailed and inclusive data for day-to-day organization’s activities such as sales reporting, purchase orders.

Tactical Reports:

Data comes from daily or weekly transactional data summary. Objective is to present short-term information for immediate decision making are replacing merchandize.

Strategic Reports:

Data comes from standard and reliable sources to build long-term business information reports like season sales analysis.

Helper Reports:

Data comes from various resources and involves images, videos to present a different activities.

What are the features of Pentaho ?

Editor — Sat, 17 Jul 2021 21:35:28 +0000

Features of pentaho

- Data integration
- Business Analytics
- Big Data Analytics
- Embedded Analytics
- Cloud Analytics
- Ad Hoc Analysis
- Online Analytical Processing (OLAP)
- Predictive Analysis
- User-Friendly Interface
- Ad Hoc Reporting
- Customizable Features
- Performance Measurements
- Intuitive dashboards.

Pentaho is ability for building Advanced Reporting Algorithms despite of their input and output data format.
It maintain different report formats such as Excel spreadsheets, XMLs, PDF docs and CSV files.
It provides value functionality and in-Hadoop functionality.
Permits dynamic drill down into larger and higher information.
Rapid Interactive response optimization.
Explore and view multidimensional data.

What is Pentaho ?

Editor — Sat, 17 Jul 2021 21:34:15 +0000

Pentaho

Pentaho is effective and creative data integration tools (DI). Pentaho maintain data sources and permits scalable data mining and data clustering.
It is a light-weight Business Intelligence performing Online Analytical Processing (OLAP) services, ETL functions, reports and dashboards build and various data-analysis and visualization operations.

This BI tool use customers for identify the importance of big data while providing a agile, cost-effective and productive cloud delivery model.
Pentaho is a business intelligence (BI) software company provides open source products which contain data integration , OLAP services , reporting and information dashboards.