Talend-Core-Developer Exam Questions and Answers

QUESTION: 9

You need to share a connection between multiple database components in a Studio Job.
Which component should you use?

tDBOutput
tDBRun
tDBCommit
tDBConnection

Answer(s): D

Explanation:

Comprehensive and Detailed Explanation;
In Talend, when multiple components need to share the same database connection, the tDBConnection component is used.

tDBConnection (Correct Answer - Option D):

This component establishes a database connection that can be reused by multiple database components (such as tDBInput, tDBOutput, and tDBRow) within the same Job.

Reduces redundant connection creation, improving performance and efficiency.

To use it, other database components must set "Use an existing connection" in their configuration.

Why not other options?

tDBOutput (Option A): Used for writing data to a database but does not manage shared connections.

tDBRun (Option B): Used to execute a subJob but does not handle database connections.

tDBCommit (Option C): Used for committing transactions, but it requires a shared connection (which tDBConnection provides).

Reference:

Talend Studio User Guide, Talend Database Connection Management

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QUESTION: 10

You have a MySQL table named customers with columns named id, name, address, and country. You need to retrieve records that have a specific country based on a variable.
Which steps should you use to achieve this?

Use a tDBInput component with a context variable in the SQL query.
Use a tDBInput component and link it to a tMatchGroup component.
Use a tDBInput component with a Run if trigger.
Use a tDBInput component and link it to a tFilterColumns component.

Answer(s): A

Explanation:

Comprehensive and Detailed Explanation;
To filter records based on a specific country dynamically, the best approach is using a tDBInput component with a context variable in the SQL query (Option A).

Step-by-Step Process:

Define a Context Variable:

In the Context Variables section of Talend Studio, create a new variable (context.country) and set its value dynamically.

Configure tDBInput:

Drag and drop the tDBInput component onto the Designer.

Set up the database connection using either Built-in or Repository mode.

In the Query field, write:

SELECT id, name, address, country FROM customers WHERE country = '" + context.country + "'

Execute the Job:

The Job will retrieve only those records where the country column matches the value of the context variable.

The value of context.country can be modified at runtime, making the query dynamic.

Why not other options?

tMatchGroup (Option B): Used for record deduplication, not filtering.

Run if Trigger (Option C): Controls execution flow but does not filter records inside tDBInput.

tFilterColumns (Option D): Removes unwanted columns but does not filter records based on conditions.

Reference:

Talend Database Components Guide, Talend SQL Query Optimization

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QUESTION: 11

How can you create REST API metadata in Talend Studio? Choose 2 answers.

Create it manually in Talend Studio.
Import it from Talend API Designer.
Import it from a JSON file.
Import it from Talend API Tester.

Answer(s): A,B

Explanation:

Comprehensive and Detailed Explanation;
In Talend Studio, REST API metadata can be created using the following methods:

Create it manually in Talend Studio (Option A):

Users can define REST API metadata within Talend Studio by manually specifying API structure,

endpoints, HTTP methods, and parameters.

This method provides full control over the API metadata but requires manual configuration.

Import it from Talend API Designer (Option B):

If an API has been designed using Talend API Designer, it can be imported into Talend Studio.

This enables reusing the API design directly without manual recreation.

Why not other options?

Option C (Import from JSON file): Talend Studio does not support direct import of REST API metadata from generic JSON files.

Option D (Import from Talend API Tester): Talend API Tester is used for testing APIs but does not provide an option to import API definitions into Talend Studio.

Reference:

Talend Studio User Guide, Talend API Development Documentation

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QUESTION: 12

What is the default port for the REST Endpoint when using tRESTRequest in Talend Studio?

5040
5070
8040
8090

Answer(s): D

Explanation:

Comprehensive and Detailed Explanation;
The default REST endpoint port for tRESTRequest in Talend Studio is 8090.

Port 8090 (Correct Answer - Option D):

When running a REST service inside Talend Studio, the default listening port is 8090.

This can be changed in the component settings if required.

Other port options explained:

5040 & 5070: Not default ports used for Talend REST services.

8040: Used in Talend Runtime, not in Studio.

Reference:

Talend Studio User Guide, Talend ESB REST Service Configuration

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QUESTION: 13

You can initialize your component endpoint, API mappings, and documentation from your API definition.
Which API definitions are supported by tRESTRequest?

CSV definition file
XML definition file
WSDL file
OAS/Swagger 2.0 file

Answer(s): D

Explanation:

Comprehensive and Detailed Explanation;
The tRESTRequest component supports OpenAPI Specification (OAS)/Swagger 2.0 for initializing component endpoints, API mappings, and documentation.

OAS/Swagger 2.0 file (Correct Answer - Option D):

tRESTRequest allows API-first development by importing a Swagger 2.0 (OAS) definition.

This enables automatic configuration of API endpoints, request parameters, and response structures.

Why not other options?

CSV definition file (Option A): Not a valid API definition format.

XML definition file (Option B): XML files are not standard for REST API definitions.

WSDL file (Option C): WSDL is used for SOAP-based web services, not REST.

Reference:

Talend API Development Guide, Talend REST Component Documentation

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QUESTION: 14

Which HTTP methods are supported by tRESTRequest?

GET, POST, PUT, PATCH, and DELETE
POST, PATCH, and UPDATE
SELECT, INSERT, UPDATE, and DELETE
GET, POST, UPDATE, and DELETE

Answer(s): A

Explanation:

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 is A. GET, POST, PUT, PATCH, and DELETE.

Reference:

Talend Components Documentation, HTTP Methods Overview

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QUESTION: 15

You are using a tRESTClient component to call a REST service.
Which advanced option should you use to convert the response from the server to the document type?

Convert Response To XML Document
Convert Response To JSON Document
Convert Response To DOM Document
Convert Response To HTML Document

Answer(s): C

Explanation:

Comprehensive and Detailed Explanation;
In Talend Studio, the tRESTClient component includes an advanced setting called "Convert Response To DOM Document".
When this option is selected, the response from the REST service is converted into a DOM (Document Object Model) document. This allows for structured processing of the response data within Talend workflows.

Reference:

Talend Components Documentation

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QUESTION: 16

Which component can be used to read a CSV file in an ESB Route?

tFileInputDelimited
cMap
cFileInputDelimited
cFile
tMap

Answer(s): C

Explanation:

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

Reference:

Talend ESB Components Documentation

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Talend Talend-Core-Developer Exam (page: 2) Talend Core Certified Developer Updated on: 25-Dec-2025

QUESTION: 9

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QUESTION: 10

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QUESTION: 11

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QUESTION: 12

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QUESTION: 13

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QUESTION: 14

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QUESTION: 15

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QUESTION: 16

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Talend Talend-Core-Developer Exam (page: 2)
Talend Core Certified Developer
Updated on: 25-Dec-2025