A Visualforce controller is a set of instructions that specify what happens when a user interacts
with the components specified in associated Visualforce markup, such as when a user clicks a
button or link. Controllers also provide access to the data that should be displayed in a page, and
can modify component behavior.
A.
True
B.
False
The correct answer is True
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I agree with the answer. B
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cannot modify component behavior
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The whole purpose of controllers is to modify component behavior. It’s True
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https://developer.salesforce.com/docs/atlas.en-us.pages.meta/pages/pages_controller_std.htm
Its right in the first paragraph
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