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 draw an image on a Canvas?

drawImage()

drawBitmap()

drawPicture()

imageResource()

None

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

drawRotate()

rotate()

rotateCanvas()

applyRotation()

None

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

Using the px() method

Using the toPx() method

Using the dpToPx() method

Using the convertDpToPx() function

None

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

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

To set the transparency of points

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

To specify the shape of the points

To adjust the color of the points

None

How do you draw text on a Canvas in Compose?

Using the drawString() function

Using the textResource() function

Using the drawText() function with a TextMeasurer

Using the drawLine() function

None

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

drawRoundedBorder()

drawOutline()

drawRoundRect() with a Stroke style

drawRectangleOutline()

None

How are Bezier curves drawn in a path?

Using arcTo() function

Using quadraticBezierTo() or cubicTo()

Using lineTo() function

Using drawCurve()

None

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

To set the color of the rectangle

To specify the position of the rectangle

To define the roundness of the rectangle’s corners

To specify the stroke width

None

10.

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

To adjust the drawing area within the Canvas

To apply shadow effects

To change the color of a shape

To increase the size of the Canvas

None

11.

In the context of Canvas, what does Offset represent?

The rotation angle

The transparency level

Coordinates on the canvas

A color gradient

None

12.

Which function is used to draw paths in Compose?

drawPath()

drawLine()

drawShape()

drawCurve()

None

13.

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

To draw an oval shape

To draw a circular shape

To draw a rectangular box

To apply gradients

None

14.

Which function is used to draw rectangles on a Canvas?

drawBox()

drawRectangle()

drawSquare()

drawRect()

None

15.

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

pathEffect()

drawPathEffect(PathEffect.dashed)

dashPathEffect()

drawDashedLine()

None

16.

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

To rotate the image

To adjust the image’s position

To apply color effects to the image

To change the size of the image

None

17.

What property does the center value of DrawScope represent?

The bottom-right corner of the Canvas

The top-left corner of the Canvas

The width of the Canvas

The center point of the Canvas area

None

18.

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

Using drawArc() with start and sweep angles

Using arcTo() with angle and size

Using drawLine() with arc parameters

Using drawArc() with gradient colors

None

19.

What is the role of the TextMeasurer in text drawing?

To calculate the size and layout of text

To apply a color gradient to text

To change the font style

To adjust text transparency

None

20.

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

Accessing size dimensions

Handling amination gestures

Performing rotations

Drawing shapes and lines

None

21.

Which function is used to fill shapes with gradient patterns?

GradientShader

Brush

fillWithGradient()

drawGradient()

None

22.

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

To adjust text alignment

To draw images with text

To define rich text with styles for drawing

To set the color of the text

None

23.

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

Start and end points, color, and stroke width

Start and end points only

Start and end points, and rotation angle

Color only

None