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Talend Core Certified Developer Exam Sample Questions (Q51-Q56):

NEW QUESTION # 51
Which HTTP methods are supported by tRESTRequest?

A. GET, POST, PUT, PATCH, and DELETE
B. GET, POST, UPDATE, and DELETE
C. POST, PATCH, and UPDATE
D. SELECT, INSERT, UPDATE, and DELETE

Answer: 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 isA. GET, POST, PUT, PATCH, and DELETE.

NEW QUESTION # 52
Whatare the key capabilities of Talend Cloud Data Preparation that improve data quality and accessibility?
Choose 2 answers

A. Discover
B. Transform
C. Standardize data
D. Cleanse data

Answer: C,D

NEW QUESTION # 53
Where do you access the option to create a Joblet from an existing Job?

A. Adding a Joblet component to the Designer.
B. Selecting the File menu.
C. Right-clicking the I oh in the Repository
D. Selecting the desired components and right-clicking.

Answer: D

Explanation:
To create a Joblet from an existing Job, you can follow these steps:
* Open the Job that you want to create a Joblet from.
* Select the components that you want to include in the Joblet.
* Right-click on the selected components and select Create Joblet from the context menu.
* In the Create Joblet dialog box, enter a name and description for the Joblet.
* Click Finish to create the Joblet.

NEW QUESTION # 54
Which statements are true when comparing a Joblet to a tRunJob component?
Choose 3 answers

A. The performance of tRunJob component is better than running an equivalent Job using a Joblet.
B. The performance of a Joblet if better than running an equivalent Job using a tRunJob component.
C. A Joblet uses the same context variables of the Job in which it is used, unlinke a tRunJob component.
D. Building a Joblet typically requires the use of generic input, and trigger component.
E. The nested Job called by a tRunJob component cannot use the same context variable of the Job in which it is used.

Answer: C,D,E

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 are building a complex Job and want to explore different options for optimizing execution times using parallelism.
How can you identify execution times to verify the effectiveness of your changes?
Choose 2 answers

A. Observing the execution time in the Code view.
B. Comparing time stamp in Trace Debug mode.
C. Heading the time stamps from the execution console in the Run view.
D. Observing the execution times that annotate the flows in the Designer.

Answer: C,D

Explanation:
To identify execution times to verify the effectiveness of your changes, you can use one of these methods:
* Reading the time stamps from the execution console in the Run view. This method allows you to see the start and end time of each subjob and component in your job, as well as the total execution time of the job. You can also see the number of rows processed by each component and the status of the job (success or failure).
* Observing the execution times that annotate the flows in the Designer. This method allows you to see the execution time of each flow (main, lookup, reject, etc.) between components in your job. You can also see the number of rows processed by each flow and the throughput (rows per second) of each flow.
You cannot use these methods to identify execution times:
* Observing the execution time in the Code view. This method does not show you the execution time of your job or its components, but only the generated code of your job in Java or Perl. The Code view is useful for debugging or customizing your code, but not for measuring performance.
* Comparing time stamps in Trace Debug mode. This method does not show you the execution time of your job or its components, but only the values of each column for each row processed by your job. The Trace Debug mode is useful for tracing data quality or transformation issues, but not for measuring performance. References: Talend Open Studio: Open-source ETL and Free Data Integration | Talend,
[Run view - 7.3], [Designer - 7.3], [Code view - 7.3], [Trace Debug mode - 7.3]

NEW QUESTION # 56
......

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