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Talend Core Certified Developer Exam Sample Questions (Q52-Q57):
NEW QUESTION # 52
You can initialize your component endpoint, API mappings, and documentation from your API definition.
Which API definitions are supported by tRESTRequest?
Answer: A
Explanation:
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.
NEW QUESTION # 53
Which concepts are a part of Pipeline Designer? Choose 3 answers.
Answer: A,C,D
Explanation:
Comprehensive and Detailed Explanation:
Talend's Pipeline Designer is a tool that enables users to design and execute data integration workflows. Key components of Pipeline Designer include:
* Connection (Option C):
* Defines the link between Pipeline Designer and various data sources or destinations, specifying how to access and interact with external systems.
* Dataset (Option D):
* Represents the structured data that flows through the pipeline, serving as the input or output of various processing steps.
* Processor (Option E):
* Performs specific operations on the data within the pipeline, such as transformations, aggregations, or filtering, to achieve the desired data processing outcomes.
Why not other options?
* Option A:While context variables are used in Talend Studio for parameterizing jobs, they are not a primary concept in Pipeline Designer.
* Option B:"Preparations" refer to data transformation sequences in Talend Data Preparation, not directly in Pipeline Designer.
NEW QUESTION # 54
Which statements are true when comparing a Joblet to a tRunJob component?
Choose 3 answers
Answer: B,C,D
Explanation:
A Joblet is a reusable piece of a job that can be used in multiple jobs as a single component. A tRunJob component is a component that allows you to call another job as a subjob within a parent job. When comparing a Joblet to a tRunJob component, these statements are true:
* A Joblet uses the same context variables of the job in which it is used, unlike a tRunJob component. A context variable is a variable that can store a value that can be changed at runtime or between different contexts. A Joblet inherits the context variables from the job that contains it and does not have its own context variables. A tRunJob component can pass context variables from the parent job to the child job, or use a specific context for the child job.
* Building a Joblet typically requires the use of generic input and trigger components. 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 trigger components, such as tJobletInput, tJobletOutput, tJobletTriggerInput, and tJobletTriggerOutput. These components allow you todefine schemas and triggers for your Joblet without depending on specific components.
* The nested job called by a tRunJob component cannot use the same context variables of the job in which it is used. A nested job is a job that is called by another job using a tRunJob component. A nested job can have its own context variables or receive context variables from its parent job, but it cannot use the same context variables as its parent job. This means that if you have two context variables with the same name in both jobs, they will be treated as separate variables and will not share values.
These statements are false when comparing a Joblet to a tRunJob component:
* The performance of tRunJob component is better than running an equivalent job using a Joblet. The performance of a Joblet is better than running an equivalent job using a tRunJob component. This is because a Joblet is integrated into the main code of the job and does not require launching another JVM process or loading another metadata object like a tRunJob component does. References: Talend Open Studio: Open-source ETL and Free Data Integration | Talend, [Joblets - 7.3], [tRunJob properties - 7.3],
[Contexts - 7.3]
NEW QUESTION # 55
You want to create a generic schema using a schema defined in a Talend component in the Repository view.
How can you accomplish this?
Answer: C
Explanation:
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.
NEW QUESTION # 56
You need to create a centralized metadata connection to a database server for an application. Which steps should you take before building a Job that reads from that database? Choose 3 answers.
Answer: B,C,D
Explanation:
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.
NEW QUESTION # 57
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