Compose Canvas Drawing Quiz

This set of multiple-choice questions focuses on the use of the Canvas component in Jetpack Compose for creating 2D graphics. The Canvas component is a powerful tool that allows developers to draw shapes, lines, paths, text, images, and gradients directly onto a defined area. The questions cover key concepts, including the DrawScope functions, methods for creating different shapes, gradients, path effects, and the use of TextMeasurer for rendering text. By exploring these questions, you will deepen your understanding of how to use Canvas to create custom drawings and animations in Jetpack Compose.

Which function is used to fill shapes with gradient patterns?

fillWithGradient()

Brush

GradientShader

drawGradient()

None

What property does the center value of DrawScope represent?

The width of the Canvas

The center point of the Canvas area

The top-left corner of the Canvas

The bottom-right corner of the Canvas

None

Which function is used to rotate a drawing element on a Canvas?

applyRotation()

drawRotate()

rotate()

rotateCanvas()

None

Which function is used to draw an image on a Canvas?

imageResource()

drawImage()

drawPicture()

drawBitmap()

None

What does the drawLine() function require to draw a line?

Color only

Start and end points, and rotation angle

Start and end points only

Start and end points, color, and stroke width

None

What is the role of the TextMeasurer in text drawing?

To adjust text transparency

To calculate the size and layout of text

To change the font style

To apply a color gradient to text

None

Which of the following is NOT a feature of the DrawScope provided by the Canvas component?

Performing rotations

Drawing shapes and lines

Handling amination gestures

Accessing size dimensions

None

In the context of Canvas, what does Offset represent?

The transparency level

The rotation angle

Coordinates on the canvas

A color gradient

None

What is the purpose of the CornerRadius component when drawing a rounded rectangle?

To define the roundness of the rectangle’s corners

To specify the position of the rectangle

To specify the stroke width

To set the color of the rectangle

None

10.

Which function is used to draw paths in Compose?

drawCurve()

drawPath()

drawShape()

drawLine()

None

11.

What is the purpose of the pointMode parameter in the drawPoints() function?

To set the transparency of points

To adjust the color of the points

To specify the shape of the points

To control how points are plotted (individual, lines, or polygons)

None

12.

How can you draw an arc on a Canvas in Compose?

Using drawArc() with gradient colors

Using drawLine() with arc parameters

Using drawArc() with start and sweep angles

Using arcTo() with angle and size

None

13.

What is the use of the drawCircle() function in Canvas?

To draw an oval shape

To draw a circular shape

To apply gradients

To draw a rectangular box

None

14.

What is the purpose of the ColorFilter in the drawImage() function?

To change the size of the image

To rotate the image

To apply color effects to the image

To adjust the image’s position

None

15.

How can you convert density-independent pixels (dp) to pixels (px) in Compose?

Using the dpToPx() method

Using the convertDpToPx() function

Using the toPx() method

Using the px() method

None

16.

Which method is used to create a dashed line in a Canvas?

drawPathEffect(PathEffect.dashed)

drawDashedLine()

dashPathEffect()

pathEffect()

None

17.

What is the role of the inset() function in Canvas drawing?

To change the color of a shape

To increase the size of the Canvas

To apply shadow effects

To adjust the drawing area within the Canvas

None

18.

How do you specify the size of a Canvas in Compose?

Using the Modifier.size() method

Using the size property of the DrawScope

Using the DrawScope.setSize() method

Using the Canvas.setSize() method

None

19.

Which function would you use to create a rounded rectangle outline?

drawOutline()

drawRoundRect() with a Stroke style

drawRectangleOutline()

drawRoundedBorder()

None

20.

How are Bezier curves drawn in a path?

Using drawCurve()

Using quadraticBezierTo() or cubicTo()

Using arcTo() function

Using lineTo() function

None

21.

Which function is used to draw rectangles on a Canvas?

drawRect()

drawSquare()

drawRectangle()

drawBox()

None

22.

What is the use of the AnnotatedString in drawText()?

To define rich text with styles for drawing

To adjust text alignment

To set the color of the text

To draw images with text

None

23.

How do you draw text on a Canvas in Compose?

Using the drawString() function

Using the drawLine() function

Using the textResource() function

Using the drawText() function with a TextMeasurer

None