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.

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

To adjust the color of the points

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

To specify the shape of the points

To set the transparency of points

None

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

Using drawArc() with gradient colors

Using arcTo() with angle and size

Using drawLine() with arc parameters

Using drawArc() with start and sweep angles

None

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

dashPathEffect()

drawPathEffect(PathEffect.dashed)

pathEffect()

drawDashedLine()

None

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

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

To define rich text with styles for drawing

To adjust text alignment

To draw images with text

To set the color of the text

None

In the context of Canvas, what does Offset represent?

The rotation angle

A color gradient

Coordinates on the canvas

The transparency level

None

How do you draw text on a Canvas in Compose?

Using the textResource() function

Using the drawString() function

Using the drawLine() function

Using the drawText() function with a TextMeasurer

None

How are Bezier curves drawn in a path?

Using arcTo() function

Using lineTo() function

Using drawCurve()

Using quadraticBezierTo() or cubicTo()

None

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

To increase the size of the Canvas

To adjust the drawing area within the Canvas

To change the color of a shape

To apply shadow effects

None

10.

What property does the center value of DrawScope represent?

The bottom-right corner of the Canvas

The width of the Canvas

The top-left corner of the Canvas

The center point of the Canvas area

None

11.

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

drawOutline()

drawRectangleOutline()

drawRoundRect() with a Stroke style

drawRoundedBorder()

None

12.

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

To draw a circular shape

To apply gradients

To draw a rectangular box

To draw an oval shape

None

13.

Which function is used to draw paths in Compose?

drawShape()

drawLine()

drawPath()

drawCurve()

None

14.

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

Start and end points only

Color only

Start and end points, and rotation angle

Start and end points, color, and stroke width

None

15.

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

drawImage()

imageResource()

drawBitmap()

drawPicture()

None

16.

Which function is used to fill shapes with gradient patterns?

drawGradient()

GradientShader

fillWithGradient()

Brush

None

17.

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

rotate()

applyRotation()

rotateCanvas()

drawRotate()

None

18.

What is the role of the TextMeasurer in text drawing?

To calculate the size and layout of text

To change the font style

To adjust text transparency

To apply a color gradient to text

None

19.

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 stroke width

To specify the position of the rectangle

To set the color of the rectangle

None

20.

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

Using the DrawScope.setSize() method

Using the size property of the DrawScope

Using the Canvas.setSize() method

Using the Modifier.size() method

None

21.

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

Accessing size dimensions

Performing rotations

Handling amination gestures

Drawing shapes and lines

None

22.

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

To adjust the image’s position

To change the size of the image

To apply color effects to the image

To rotate the image

None

23.

Which function is used to draw rectangles on a Canvas?

drawRectangle()

drawBox()

drawRect()

drawSquare()

None