Computer Image Representation

Computer Image Representation

8th Grade

10 Qs

quiz-placeholder

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Computer Image Representation

Computer Image Representation

Assessment

Quiz

Computers

8th Grade

Hard

Created by

TABASSUM BEGUM

Used 2+ times

FREE Resource

10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is a pixel and how is it used to represent an image?

A pixel is a measurement of image brightness and has no role in representing an image

A pixel is a type of computer virus that can corrupt images

A pixel is the smallest unit of a digital image, and it is used to represent an image by combining multiple pixels to form the complete picture.

A pixel is a unit of measurement for printed images, not digital ones

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Explain the difference between raster graphics and vector graphics.

Raster graphics are used for 3D images, while vector graphics are used for 2D images.

Raster graphics have smooth edges, while vector graphics have pixelated edges.

Raster graphics are black and white, while vector graphics are in color.

Raster graphics are made up of pixels, while vector graphics are made up of paths and curves.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Name three common image file formats and describe their characteristics.

JPEG, PNG, GIF

MP3, MP4, WAV

PDF, TIFF, BMP

TXT, DOCX, PPTX

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is lossless compression and how does it work in image representation?

Lossless compression only preserves half of the original data in the image

Lossless compression removes some data from the image

Lossless compression preserves all original data in the image.

Lossless compression changes the color of the image

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the purpose of lossy compression in image files?

To increase file size by adding unnecessary image data

To improve image quality by reducing pixel density

To make the file incompatible with certain devices or software

To reduce file size by permanently eliminating some image data

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Explain the concept of color depth in relation to image representation.

The brightness of the image

The number of colors in the image

The size of the image in pixels

The number of bits used to represent the color of a single pixel in an image.

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How does a computer use RGB values to represent colors in an image?

By converting the RGB values to hexadecimal format

By using black, white, and gray colors only

By combining different intensities of red, green, and blue light

By mixing red, yellow, and blue colors

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