Manipulating image data with methods such as getImageData and putImageData Mockest | HTML

1.

Which method is used to extract pixel data from a canvas?

A). getImageData() B). drawPixelData() C). setPixelData() D). modifyImageData()

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2.

What type of object does getImageData return?

A). PixelData B). ImageData C). CanvasData D). ImageDataObject

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3.

Which parameter specifies the rectangular area from which pixel data will be extracted?

A). x-coordinate B). y-coordinate C). width D). height

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4.

What does the putImageData method do?

A). Extracts pixel data B). Draws pixel data onto the canvas C). Modifies pixel data D). Deletes pixel data

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5.

Which method is used to draw pixel data onto the canvas?

A). drawPixelData() B). putPixelData() C). displayImageData() D). putImageData()

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6.

What type of object is passed as an argument to putImageData?

A). ImageDataObject B). CanvasData C). PixelData D). ImageData

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7.

Which of the following is NOT a use case for manipulating image data?

A). Image filtering B). Text rendering C). Pixel manipulation D). Image processing

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8.

What is the purpose of modifying pixel data with getImageData and putImageData?

A). To change canvas size B). To animate images C). To manipulate image colors D). To add text to images

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9.

Which channel represents the red color in pixel data?

A). Red channel B). Green channel C). Blue channel D). Alpha channel

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10.

How can you create a grayscale effect using getImageData and putImageData?

A). Set all RGB channels to the same value B). Invert the colors C). Convert to black and white D). Apply a blur effect

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Manipulating image data with methods such as getImageData and putImageData Mocktest

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