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What is the purpose of getting the parameter block?

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in JavaScript by (52.2k points)
What is the purpose of getting the parameter block?

(a) Permission to block

(b) Space separated block list

(c) Comma separated block list

(d) Underscore separated block list

I got this question at a job interview.

This is a very interesting question from Accessing the WebPagetest API in portion Sockets of JavaScript

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Right choice is (c) Comma separated block list

To elaborate: A ParameterBlock encapsulates all the information about sources and parameters (Objects) required by a RenderableImageOp, or other classes that process images. This parameter allows you to set a comma separated list of block options.

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