Talend Updated Talend-Core-Developer Exam Questions and Answers by adeline

Comprehensive and Detailed Explanation:

ThetRESTRequest componentsupportsOpenAPI Specification (OAS)/Swagger 2.0for initializing component endpoints, API mappings, and documentation.

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

tRESTRequest allows API-first development by importing aSwagger 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.

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.​

Tags are used to mark specific points in the development lifecycle of a project. This can be done for a variety of reasons, such as:

To mark the completion of a major feature or release

To mark the start of a new development phase (e.g., QA, production)

To mark a known good state of the codebase (e.g., before a risky change)

Tags can be used to create branches, which can then be used to develop and test new features or bug fixes. They can also be used to deploy the codebase to different environments (e.g., development, staging, production).

Examples of when to use a tag:

When you are ready to release a new version of your application to production.

When you have completed a major feature or milestone in the development of your application.

Before making a risky change to your codebase, such as a database migration or refactoring.

When you need to deploy your application to a different environment, such as staging or production.

Benefits of using tags:

Tags can help you to keep track of the different versions of your codebase.

Tags can help you to roll back to a previous version of your codebase if necessary.

Tags can help you to deploy your codebase to different environments.

Tags can help you to collaborate with other developers more effectively.

Comprehensive and Detailed Explanation:

The validity of a dataset in Talend's Trust Score™ framework is determined by:​

Number of valid and invalid values across the dataset sample (Option B):

This metric assesses the quality of the data by evaluating the proportion of valid entries compared to invalid ones. A higher number of valid values indicates better data quality.​

Use of semantic types across the dataset sample (Option C):

Semantic types help in understanding the meaning and context of data fields. Consistent and correct application of semantic types ensures that data is interpreted accurately, contributing to its validity.​

Why not other options?

Option A: User ratings and certification pertain to the popularity axis, reflecting user trust and endorsement, not the intrinsic validity of the data.​

Option D: The number of empty rows relates to the completeness axis, indicating missing data, rather than directly affecting validity.​