Curious about Actual Talend Core Certified Developer (Talend-Core-Developer) Exam Questions?

Correct : D

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).

Correct : A

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.

Correct : A, B

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.

Correct : D

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.

Correct : D

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.