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 paths in Compose?

drawLine()

drawPath()

drawCurve()

drawShape()

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 pointMode parameter in the drawPoints() function?

To adjust the color of the points

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

To set the transparency of points

To specify the shape of the points

None

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

Handling amination gestures

Drawing shapes and lines

Accessing size dimensions

Performing rotations

None

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

Start and end points, and rotation angle

Start and end points only

Start and end points, color, and stroke width

Color only

None

How are Bezier curves drawn in a path?

Using drawCurve()

Using quadraticBezierTo() or cubicTo()

Using lineTo() function

Using arcTo() function

None

What is the role of the TextMeasurer in text drawing?

To change the font style

To adjust text transparency

To apply a color gradient to text

To calculate the size and layout of text

None

Which function is used to draw rectangles on a Canvas?

drawBox()

drawRect()

drawRectangle()

drawSquare()

None

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

pathEffect()

dashPathEffect()

drawPathEffect(PathEffect.dashed)

drawDashedLine()

None

10.

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

To apply gradients

To draw a circular shape

To draw a rectangular box

To draw an oval shape

None

11.

How do you draw text on a Canvas in Compose?

Using the drawText() function with a TextMeasurer

Using the textResource() function

Using the drawString() function

Using the drawLine() function

None

12.

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

Using arcTo() with angle and size

Using drawArc() with start and sweep angles

Using drawArc() with gradient colors

Using drawLine() with arc parameters

None

13.

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

drawBitmap()

drawImage()

imageResource()

drawPicture()

None

14.

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

To specify the stroke width

To define the roundness of the rectangle’s corners

To specify the position of the rectangle

To set the color of the rectangle

None

15.

Which function is used to fill shapes with gradient patterns?

fillWithGradient()

GradientShader

Brush

drawGradient()

None

16.

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

To change the size of the image

To rotate the image

To adjust the image’s position

To apply color effects to the image

None

17.

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

drawOutline()

drawRoundedBorder()

drawRectangleOutline()

drawRoundRect() with a Stroke style

None

18.

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

Using the convertDpToPx() function

Using the dpToPx() method

Using the toPx() method

Using the px() method

None

19.

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

To adjust text alignment

To draw images with text

To set the color of the text

To define rich text with styles for drawing

None

20.

What property does the center value of DrawScope represent?

The width of the Canvas

The top-left corner of the Canvas

The center point of the Canvas area

The bottom-right corner of the Canvas

None

21.

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

22.

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

rotate()

rotateCanvas()

applyRotation()

drawRotate()

None

23.

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

To adjust the drawing area within the Canvas

To increase the size of the Canvas

To change the color of a shape

To apply shadow effects

None