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How do you create an empty Joblet?
To create an empty Joblet, you need to right-click on the Joblet Designs node in the Repository tree view and select Create Joblet option. This will open a dialog box where you can enter the name and description of your Joblet and select an icon for it. You can then design your Joblet by adding components and links to it in the Designer workspace.
You cannot create an empty Joblet by creating an empty job, then exporting it as a Joblet by right-clicking it in the Repository, creating an empty job and using the file menu to save it as Joblet, or right-clicking a space in the Designer and selecting refactor to Joblet. These methods are not available in Talend Studio and may cause errors or unexpected results. Reference: Talend Open Studio: Open-source ETL and Free Data Integration | Talend, [Joblets - 7.3]
You create a Job consisting of two subJobs, A and B. You added Joblet C with the intension of running it between A and B.
What are the minimum requirements to orchestrate this? (Choose Two)
To create a job consisting of two subjobs, A and B, and add a Joblet C with the intention of running it between A and B, you need to do the following steps:
Design subjob A by adding components and links to it in the Designer workspace.
Add a Start component to mark the beginning of subjob B and link it to subjob A using an OnSubjobOk trigger.
Design subjob B by adding components and links to it after the Start component in the Designer workspace.
Add a tJobletTriggerInput component to your Joblet C design and link it to other components in your Joblet using data flows or triggers.
Add a tJobletTriggerOutput component to your Joblet C design and link it to other components in your Joblet using data flows or triggers.
Drag your Joblet C from the Repository tree view to the Designer workspace between subjob A and subjob B.
Link your Joblet C to subjob A using an OnComponentOk trigger from the last component of subjob A to the tJobletTriggerInput component of your Joblet C.
Link your Joblet C to subjob B using an OnComponentOk trigger from the tJobletTriggerOutput component of your Joblet C to the Start component of subjob B.
The minimum requirements to orchestrate this are adding TRIGGER_INPUT and TRIGGER_OUTPUT components into C and linking A, B, and C using OnSubjobOk triggers. These are generic components that allow you to define triggers for your Joblet without depending on specific components. You do not need to add TRIGGER_INPUT and TRIGGER_OUTPUT components into A or B, as these are regular subjobs that can use any type of components or triggers. Reference: Talend Open Studio: Open-source ETL and Free Data Integration | Talend, [tJobletTriggerInput properties - 7.3], [tJobletTriggerOutput properties - 7.3], [Joblets - 7.3], [Triggers - 7.3]
Which HTTP methods are supported by tRESTRequest?
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.
You need a list of all customers whose first name contains "Tom" and who are older than 18. Which processor should be used?
Comprehensive and Detailed Explanation:
To filter customer records based on first name containing 'Tom' and age greater than 18, the Filter processor is the correct choice.
Filter (Option C) -- Correct Answer:
The Filter processor allows users to set conditional rules to extract only the required data.
Users can specify conditions such as:
first_name CONTAINS 'Tom'
AND
age > 18
This ensures that only relevant records are included in the output.
Why not other options?
Option A (Join): Used to combine data from multiple datasets based on a key field, not for filtering.
Option B (Aggregate): Used for summarizing data, such as calculating counts, sums, or averages.
Option D (Data Sampling): Used to select a random subset of data, not for filtering based on conditions.
You need to share a connection between multiple database components in a Studio Job. Which component should you use?
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).
