Free Practice Questions for Talend Talend-Core-Developer Exam

Comprehensive and Detailed Explanation:

After publishing a Job from Talend Studio to Talend Cloud, you can execute it using the Talend Management Console (TMC) by following these steps:​

Add a task and then run the task (Option A):

In TMC, navigate to theManagementsection and selectTasks.​

Click onAdd Task, choose the published artifact (your Job), configure necessary parameters, and save the task.​

Once the task is created, you can run it manually or schedule it for execution.​

Select the artifact name, add and configure a task, then run the task (Option D):

In TMC, go to theArtifactssection to view your published Jobs.​

Select the desired artifact and click onAdd Task.​

Configure the task settings as needed and save it.​

After creating the task, you can execute it immediately or set up a schedule.​

Why not other options?

Option B:TMC does not support directly running a Job by clicking on the artifact name without first creating a task.​

Option C:While you can select and configure an existing task, the initial step requires creating the task associated with the artifact.​

Comprehensive and Detailed Explanation:

To manually pair a Remote Engine with Talend Cloud, you can set the pairing key using the following methods:​

In the Remote Engine web service page (Option B):

Access the Remote Engine's web interface, typically available at http://localhost:8043/configuration.​

Enter the pairing key obtained from the Talend Management Console.​

Click onPAIR REMOTE ENGINEto establish the connection.​

In the key configuration file of the engine (Option C):

Locate the preauthorized.key.cfg file in the Remote Engine's etc directory.​

Open the file and paste the pairing key into the remote.engine.pre.authorized.key parameter.​

Save the changes and restart the Remote Engine to apply the configuration.​

Why not other options?

Option A:Setting the pairing key in Talend Studio's preferences is not applicable for pairing a Remote Engine.​

Option D:While it's technically possible to pass the pairing key as a parameter in the engine's run script, it's not the standard or recommended method.​

Comprehensive and Detailed Explanation:

The tRESTRequest component in Talend Studio is designed to handle RESTful web service requests. It supports the following HTTP methods:​

GET: Retrieves data from the server.​

POST: Submits data to the server, often causing a change in state or side effects.​

PUT: Replaces all current representations of the target resource with the request payload.​

PATCH: Applies partial modifications to a resource.​

DELETE: Removes the specified resource from the server.​

Therefore, the correct answer isA. GET, POST, PUT, PATCH, and DELETE.​

Comprehensive and Detailed Explanation:

In Talend's Enterprise Service Bus (ESB) routes, the appropriate component to read a CSV file iscFileInputDelimited. This component is specifically designed for Camel routes to handle delimited files like CSVs.​

Comprehensive and Detailed Explanation:

The Talend Trust Score™ is a feature of Talend Cloud Data Inventory that provides an assessment of a dataset's reliability and quality:​

Aggregates several metrics into a single score (Option A):

The Trust Score™ combines multiple factors, including validity, completeness, popularity, discoverability, and usage, into a single, comprehensive score. This aggregation helps users quickly gauge the overall trustworthiness of a dataset.​

Scales the Trust Score from 0 to 5 (Option C):

The Trust Score™ ranges from 0 to 5, with higher scores indicating better data quality and reliability. This standardized scale allows for easy comparison between datasets.​

Why not other options?

Option B:While data consumers can view and utilize the Trust Score™, it is automatically calculated by Talend based on specific metrics; users do not assign this score themselves.​

Option D:The Trust Score™ does not use a 0 to 10 scale; it specifically ranges from 0 to 5.​

Trace Debug and Java Debug are two modes that allow you to debug your jobs in Talend Studio. Trace Debug mode allows you to trace each row processed by your job components and see the values of each column in each row. Java Debug mode allows you to debug your job code in Java or Perl and see the values of each variable or expression in your code.

The characteristics that distinguish Trace Debug from Java Debug are:

Trace Debug mode allows row-by-row inspection of data flows, while Java Debug mode does not. Data flows are the links that show the data transfer between components in your job design workspace. In Trace Debug mode, you can see the data flow on each trace and inspect the values of each column for each row processed by your job. You can also use filters to display only the rows that match a condition or an expression. In Java Debug mode, you cannot see the data flow on each trace or inspect the values of each column for each row.

Trace Debug mode supports breakpoints based on input data condition, while Java Debug mode does not. Breakpoints are points where the execution of your job pauses and waits for your action. You can use breakpoints to inspect your data or debug your logic at specific points of your job execution. In Trace Debug mode, you can set breakpoints on traces based on a condition or an expression that involves input data columns. For example, you can set a breakpoint to pause your job when a customer name contains a certain string or when a product price exceeds a certain value. In Java Debug mode, you can only set breakpoints on lines of code based on a condition or an expression that involves variables or expressions.

The characteristics that do not distinguish Trace Debug from Java Debug are:

Both modes require a separate perspective. A perspective is a set of views and editors that are arranged in a specific way to support a specific task. In Talend Studio, you can switch between different perspectives, such as Integration, Debug, Profiling, etc. To use Trace Debug mode, you need to switch to the Debug perspective by clicking on the Open Perspective button and selecting Debug. To use Java Debug mode, you need to switch to the Java perspective by clicking on the Open Perspective button and selecting Java.

Neither mode requires Java development experience. Although Java Debug mode allows you to debug your job code in Java or Perl, you do not need to have Java development experience to use it. You can use the graphical interface of Talend Studio to design your job components and properties without writing any code. You can also use the Code view to see the generated code of your job in Java or Perl and modify it if needed. However, you do not need to write any code from scratch or understand all the details of the code to use Java Debug mode. References: Talend Open Studio: Open-source ETL and Free Data Integration | Talend, [Trace Debug mode - 7.3], [Java Debug mode - 7.3]

Comprehensive and Detailed Explanation:

In Talend Pipeline Designer, theconfiguration panelprovides options for managing and modifying the settings of components within a pipeline.

Modify processor values (Option A):

Users can adjust values for processors such as filters, joins, transformations, and aggregations within the configuration panel.

This helps fine-tune data processing rules directly in the pipeline.

Display and update dataset connections (Option B):

The configuration panel allows users to change dataset connections, updating the source or target locations of data.

Users can modify database credentials, file paths, or API endpoints as needed.

Why not other options?

Option C:The ability to preview changes made by processors is handled in thepreview panel, not the configuration panel.

Option D:Pipeline export settings are managed separately in theexport settings menu, not in the configuration panel.

The generic Input component used for in a Joblet design is the tJobletInput component. This component is used to carry data into a Joblet from another component in the job that contains the Joblet. A Joblet is a reusable piece of a job that can be used in multiple jobs as a single component. A Joblet can have one or more input and output flows that connect it with other components in a job. To create these flows, you need to use generic input and output components, such as tJobletInput, tJobletOutput, tJobletTriggerInput, and tJobletTriggerOutput. These components allow you to define schemas and triggers for your Joblet without depending on specific components.

The tJobletInput component is not used for triggering a Joblet, triggering a subjob, or carrying data into a subjob. These are different concepts and functionalities in Talend Studio. A trigger is a link that activates a subjob or a component based on a condition or an event. A subjob is a part of a job that consists of one or more components connected by data flows or triggers. A subjob can be triggered by another subjob using triggers such as OnSubjobOk, OnSubjobError, Run if, etc. A subjob can also carry data into another subjob using data flows such as main, lookup, reject, etc. References: Talend Open Studio: Open-source ETL and Free Data Integration | Talend, [tJobletInput properties - 7.3], [Joblets - 7.3], [Triggers - 7.3]

Comprehensive and Detailed Explanation:

To establish a centralized metadata connection to a database server in Talend Studio, follow these steps before constructing a Job that reads from the database:​

Create Db Connections Metadata to Describe the Database Connection (Option C):

In the Repository panel, right-click on "Metadata" and select "Create connection."​

Fill in the necessary details such as database type, host, port, database name, username, and password.​

Test the connection to ensure it is configured correctly.​

Save the connection metadata for reuse across multiple Jobs.​

Retrieve the Schemas from the Database Connection (Option E):

After creating the database connection metadata, expand it to view the available schemas.​

Retrieve the required schemas by importing the table structures.​

This step ensures that the schema definitions are centralized and can be reused in different Jobs.​

Drag the Db Connections Metadata onto the Designer to Read from the Database Component (Option D):

In the Repository, locate the previously created database connection metadata.​

Drag and drop the desired table or schema onto the Designer workspace.​

Talend Studio will automatically create the appropriate input component (e.g., tDBInput) configured with the connection and schema details.​

By following these steps, you ensure a centralized and consistent approach to managing database connections and schemas, promoting reusability and reducing configuration errors.​