Comprehensive and Detailed Explanation From Exact Extract:

A (Correct):The renderAs="application/pdf" attribute in the tag instructs the Visualforce page to render the content as a PDF file when accessed.

Example:

Invoice

Incorrect options:

B:renderAs="pdf" is incorrect; the correct MIME type is application/pdf.

C/D:contentType controls headers but doesn't render the content as PDF.

Salesforce CLI allows developers to automate deployments and run unit tests as part of a continuous integration (CI) pipeline. It is the most efficient tool for scripting these processes.

A: A Flow can guide sales reps through a set of scripted steps and call an Apex action to interact with an external REST endpoint.

B: An Invocable method is used to make an Apex method callable from a Flow. This method can call the REST endpoint and return the data for display.

Why not other options?

C: Future methods are asynchronous and cannot return data to the user in real time.

D: Triggers are used for database events, not for guiding users through scripted processes or making REST calls.

The requirement specifies that theSalary__cfield should function as acurrency inputand honor field-level security.

Thelightning-input-fieldcomponent (Option C) automatically respects field-level permissions set in Salesforce and ensures theSalary__cfield is editable and viewable only by authorized users.

Other options do not guarantee compliance with field-level security:

Option A:does not enforce field-level security.

Option B:is read-only and cannot be used for editing.

Option D:requires custom logic for enforcing security.

Roll-Up Summary Field:

Since the relationship between Order and Order Line Item is aMaster-Detail, a Roll-Up Summary field can be used on the Order object.

The MAX function in a Roll-Up Summary field calculates the latest date (the maximum value) among all the availability dates on the Order Line Items.

Why MAX Roll-Up Summary Field Works:

The latest availability date among the Order Line Items will determine when the entire Order can be shipped.

Why Not Other Options?

AandB: There is no such formula called "LATEST" or "CEILING" applicable to date fields.

C: A COUNT Roll-Up Summary is irrelevant for calculating dates.

WhyTest.loadData()?

Simplifies test data creation by loading data from a CSV file stored as a static resource.

Ideal for testing specific field values in bulk.

Why Not Other Options?

A: Querying data from the org violates test isolation principles.

C: Anonymous Apex cannot be used within test classes.

D: JSON files in Documents are not supported byTest.loadData().

TherecordSetVarattribute of thetag allows a Visualforce page to handle multiple records, which is ideal for list buttons that display a page for bulk editing.

Why not other options?

A: Standard controllers can be extended, but usingrecordSetVaris the direct and best-supported method for this scenario.

B: There is no such concept as a "Custom List Controller" in Visualforce.

C:is not a valid Visualforce tag.

B:@testSetupinserts data once and shares it across all test methods in the class, saving system resources.

D:@isTest(SeeAllData=true)is incompatible with@testSetupdue to their differing purposes for managing test data.

Why Prebuilt Components?

The Lightning Component Framework includes a library of prebuilt components, which developers can use to build applications faster.

Why Not Other Options?

A: The framework is exclusive to Lightning Experience, not Classic UI.

C: The framework does not provide templates but focuses on reusable components.

D: Extended governor limits are not provided by the framework.

A: Thesave()method in the custom controller must be tested to ensure it works as intended and redirects to the correct page.

B: Setting parameters viaApexPages.currentPage().getParameters()is crucial to test scenarios where user input or URL parameters drive logic.

D: UsingTest.setCurrentPage(pageRef)is essential for simulating page context in unit tests.

Why not other options?

C: This statement does not belong to testing a custom controller.

B (second occurrence): It appears to be incorrectly formatted in the question.