Talend-Core-Developer Exam Questions

To execute the compiled job outside Talend Studio, you need to right-click on the job in the Repository tree view and select Build Job option. This option allows you to export your job as an executable file that can be run independently from Talend Studio on any platform that supports Java. You can access this option by right-clicking on your job in the Repository tree view and selecting Build Job. This will open a dialog box where you can configure the build settings, such as destination folder, archive name, context, etc.

You do not need to click the Export button in the Edit Properties window, right-click on the job in the Repository and select Export items, or select Save As on the main File menu. These options are not used to execute the compiled job outside Talend Studio. The Export button in the Edit Properties window is used to export your job properties as an XML file. The Export items option is used to export your items (such as jobs, metadata, routines, etc.) as an archive file that can be imported into another project or workspace. The Save As option is used to save a copy of your job with a different name or location. Reference: Talend Open Studio: Open-source ETL and Free Data Integration | Talend, [Build Job - 7.3]

To create a generic schema from a schema defined in a Talend component, follow these steps:

Open the Repository View:

In Talend Studio, navigate to the Repository panel, typically located on the left side of the interface.

Locate the 'Generic schemas' Node:

Within the Repository, expand the 'Metadata' section to find the 'Generic schemas' node.

Initiate the Generic Schema Creation Process:

Right-click on 'Generic schemas' and select 'Create generic schema' from the context menu.

Define the Schema Properties:

In the schema creation wizard that appears, provide the necessary properties such as 'Name' and 'Description' for the new generic schema.

Set Up the Schema Structure:

Define the schema structure by adding columns and specifying their data types as required.

Finalize the Schema Creation:

Click 'Finish' to complete the creation process. The new generic schema will now be available under the 'Generic schemas' node in the Repository.

This method allows you to create a reusable generic schema that can be applied across multiple components and Jobs within Talend Studio.

When you modify the schema of a component in Talend Studio, the application prompts you to propagate these changes. This propagation ensures that any alterations to the data structure are consistently applied throughout the Job, maintaining data integrity and coherence.

Understanding Schema Propagation:

Purpose: Schema propagation is essential to synchronize the data structure across connected components. When a schema changes (e.g., adding or removing a column), downstream components that rely on this schema need to be updated to reflect these changes.

Prompt Significance: The prompt serves as a confirmation to apply the schema changes to the subsequent components in the Job. By agreeing to propagate, Talend Studio automatically updates the schemas of all downstream components connected to the modified component.

Example Scenario:

Consider a Job where a tFileInputDelimited component reads data and passes it to a tMap component, which then outputs to a tFileOutputDelimited component. If you add a new column to the schema of tFileInputDelimited:

Modification:

You add a new column, 'emailAddress', to the tFileInputDelimited schema.

Propagation Prompt:

Upon making this change, Talend Studio prompts you to propagate the schema changes.

Effect of Propagation:

By confirming, the 'emailAddress' column is added to the schemas of all downstream components (e.g., tMap and tFileOutputDelimited). This ensures that these components recognize and can process the new column appropriately.

By understanding and utilizing schema propagation, you ensure that all components within your Talend Jobs remain synchronized, reducing errors and enhancing data processing efficiency.

To enable SSL for a JobServer, you need to edit the conf/TalendJobServer.properties file. A JobServer is a server application that allows you to execute jobs remotely from Talend Studio or Talend Administration Center. The conf/TalendJobServer.properties file contains various configuration parameters for your JobServer, such as port number, log level, security options, etc. To enable SSL for your JobServer, you need to set the ssl parameter to true and provide the path and password of your keystore file that contains your SSL certificate.

You do not need to edit conf/TalendServer.properties, conf/server.xml, or jsl_static64.ini files. These files are not related to JobServer configuration or SSL settings. The conf/TalendServer.properties file is used to configure Talend Administration Center settings, such as database connection, LDAP authentication, email notification, etc. The conf/server.xml file is used to configure Tomcat server settings, such as connectors, realms, valves, etc. The jsl_static64.ini file is used to configure Java Service Launcher settings, such as service name, description, startup type, etc. Reference: Talend Open Studio: Open-source ETL and Free Data Integration | Talend, [Configuring Talend JobServer - 7.3], [Configuring Talend Administration Center - 7.3], [Configuring Tomcat - 7.3], [Installing Java Service Launcher - 7.3]

In Talend Studio, there are multiple methods to specify the schema for a tFileInputDelimited component. The three primary approaches include:

A . Add the component, open the Component view, select the Built-in schema type, then click the Edit schema button.

Process:

Add the Component:

Drag and drop the tFileInputDelimited component onto the design workspace.

Access Component View:

Click on the component to open its Basic settings in the Component view.

Select Built-in Schema Type:

Under the 'Schema' section, choose 'Built-In' from the 'Property Type' dropdown menu.

Edit Schema:

Click the 'Edit schema' button to define the schema structure by adding columns and specifying their data types.

C . Add the component, then drag and drop a generic schema metadata item onto the component.

Process:

Add the Component:

Place the tFileInputDelimited component onto the design workspace.

Drag Generic Schema:

From the Repository, locate the predefined generic schema metadata item.

Assign Schema to Component:

Drag the generic schema metadata item and drop it onto the tFileInputDelimited component. This action assigns the predefined schema to the component.

E . Drag a File delimited metadata item from the Repository onto the design workspace.

Process:

Locate Metadata Item:

In the Repository, navigate to the 'Metadata' section and find the 'File delimited' metadata item corresponding to your delimited file.

Drag to Workspace:

Drag the 'File delimited' metadata item and drop it onto the design workspace.

Automatic Component Creation:

Talend Studio automatically creates a tFileInputDelimited component configured with the schema defined in the metadata.

These methods provide flexibility in defining schemas for the tFileInputDelimited component, allowing for both manual configuration and reuse of predefined metadata.