Municipal budgetary educational institution

"Secondary school number 20"

Information coding test

Grade 7 (FGOS)

MBOU "Secondary School No. 20"

Pospelova Galina Vasilievna

Novomoskovsk

2018 Nov.

Explanatory note.

This didactic material on the topicInformation Processing is recommended for grade 7 students. The material includes tasks to which students give a written answer.

Objectives:

subject -formation of an understanding of the basic concepts associated with the encoding of graphic and text information on a computer;

metasubject -basic skills and abilities to use coding tools for solving practical problems; mastery of the basics of self-control, self-esteem, decision-making and making informed choices in educational and cognitive activities;

personal- the ability to link knowledge about the basic capabilities of a computer with one's own life experience; interest in issues related to the practical application of computers.

Solved educational tasks:

1) consideration of the coding of graphic and text formations;

2) determination of the information volume of the image, message;

3) determination of the codes of the characters of the text according to the code tables.

Test on the topic " Coding of text and graphic information "

Exercise 1

In what order will the text fragments “excel”, “byte”, “8c”, “10g”, “9a”, “10a” go if you arrange them in descending order?

A. "byte", "excel", "8v", "9a", "10g", "10a"

B. "byte", "excel", "8v", "9a", "10a", "10g"

C. "10a", "10g", "9a", "8v", "byte", "excel"

D. "byte", "excel", "9a", "8v", "10g", "10a"

E. "excel", "byte", "10g", "10a", "9a", "8v"

Assignment 2

What is the maximum number of characters that the encoding table can contain if, during storage, one character from this table takes up 10 bits of memory?

A. 800

B. 80

C. 1024

D. 512

E. 256

Assignment 3

Select the word with the highest sum of character codes from the ASCII encoding table.

A. Window

B. Cinema

C. Nika

D. Horse

E. Night

Assignment 4

Select a piece of text "1999", "2001", "file", "file", "2b2d", which has the minimum sum of character codes in the ASCII table.

A... "2b2 d»

B... "file"

C. « file»

D... "1999"

E. "2001"

Assignment 5

Cyan on a computer with a 125 KB page size is encoded as 0011. What is the resolution of the graphic display?

A. 640 × 200

B. 320 × 400

C. 640 × 400

D. 640 × 800

E. 512 × 400

Assignment 6

In the process of converting a raster graphic file, its size has decreased by 1.5 times. How many colors were in the palette initially if after conversion a bitmap of the same size was obtained in a 256-color palette?

A. 3072

B. 384

C. 2048

D. 12

E. 4096

Assignment 7

Some of the pages of the book are color images in a sixteen-color palette and in a format of 320 × 640 pixels; pages containing text are formatted as 64 lines with 48 characters per line. How many pages of a book can be saved on a 40 MB hard magnetic disk if the number of pages with color images is 80 more than the number of pages containing only text?

A. 400

B. 720

P. 320

D. 100

E. 530

Information sources:

Bosova L.L. Informatics: a textbook for grade 7 / L.L. Bosova, A. Yu. Bosova - Moscow: BINOM. Knowledge Laboratory, 2015 - 224 p.

Bosova L.L. Informatics: workbook for grade 7 / L.L. Bosova, A. Yu. Bosova - Moscow: BINOM. Knowledge laboratory, 2015 - 160 p.

Rusakov S.V. Test tasks for the basic course of informatics / S.V. Rusakov, L.V. Shestakov. - M.: Chistye Prudy, 2006 .-- 32 p.

Key

Option 1.

...

What is 1 byte?

A raster graphic file contains black and white (no grayscale) with a size of 100x100 pixels. What is the information volume of this file? (in bits)

A raster file containing a black and white (no grayscale) square image has a size of 200 bytes. Calculate the size of the side of the square (in pixels).

Determine the required amount of video memory, if the screen size of the monitor is 640x480, the color depth is 24 bits.

In the process of converting a bitmap graphic image, the number of colors decreased from 65536 to 16. How many times will the amount of memory occupied by it decrease.

It is known that the video memory of a computer has a volume of 512 KB. The screen resolution is 640 by 200 pixels. How many screen pages will fit in video memory at the same time with a palette of 8 colors

Option 2.

The largest unit of information measurement is ...

What is 1 Megabyte?

A raster graphic file contains black and white (no grayscale) with a size of 10x10 pixels. What is the information volume of this file? (in bits)

A raster file containing a black and white (no grayscale) square image has a size of 400 bytes. Calculate the size of the side of the square (in pixels).

Determine the required amount of video memory, if the screen size of the monitor is 800x600, the color depth is 16 bit.

To store a raster image with a size of 128x128 pixels, 4 KB of memory were allocated. What is the maximum possible number of colors in the image palette.

How much video memory is required to store four pages of an image if the bit depth is 24 and the display resolution is 800x600 pixels. (In MB)

In the process of converting a bitmap graphic image, the number of colors decreased from 65536 to 256. How many times the amount of memory occupied by it will decrease.

It is known that the video memory of a computer has a volume of 512 KB. The screen resolution is 640 by 200 pixels. How many screen pages will fit in video memory at the same time with a palette of 16 colors

Answers.

Option 1.

Bit

8 bit.

10000 bit

40x40

7372800 bits = 921600B = 900KB

N=4

4 times

Solution: 640x200x3 = 384000bit - 1 page

4194304bit / 384000bit = 10.9 pages

Option 2.

1 TB

1 MB = 1024KB = 1048576B = 8388608bit

100bit

400B = 400 * 8 = 3200bit, 56.6x56.6

800x600x16 = 480,000 bits = 60,000 bytes = 58.6 KB

N=4

5.5 MB storage 4 pages

65536=2 16 ,256=2 8 ; 16/8 = 2 times

Solution: 640х200х4 = 512000bit - 1 page

512KB = 512x1024x8 = 4194304bit

4194304bit / 512000bit = 8.19pages

There are examples with a solution.

Option 1

1. Analog form
2. Discrete form

2. Graphic images are converted by spatial sampling:

3. What is the minimum object used in a vector graphics editor?

1. Screen point (pixel);
2. Color palette;
3. familiarity (symbol).

4. Deformation of the image when changing the size of the picture - one of the disadvantages:

1. vector graphics;
2. raster graphics.

5. In the process of converting a raster graphic image, the number of colors decreased from 4 096 to 16. How many times will its information volume decrease?

1. 2 times
2. 3 times
3. 4 times
4. 5 times

6. A raster image with a palette of 256 colors has a size of 10 * 10 pixels. What information volume does the image have?

1. 100 bit
2. 100 bytes
3. 256 bit
4. 25600 bit

7. Basic colors of the RGB palette:

1) red, blue and green

2) blue, yellow, green

3) red, yellow and green

5) the palette of colors is formed by setting the values ​​of hue, saturation and brightness

1) N = 2 i

2) N = 2 ∙ i

3) I = N ∙ 2

4) 2 = N i

5) I = N 2

9. The following parameters are set in the RGB color model: 0, 0, 255. What color will correspond to these parameters?

1. The black
2. red
3. green
4. blue

10. To encode the background color of a web page, use the bgcolor = "# XXXXXX" attribute, where the hexadecimal values ​​of the intensity of the color components in the 24-bit RGB model are set in quotes. What is the background color of the page specified by the tag?

1) white

2) green

3) red

4) blue

Test on the topic "Coding of graphic information"

Option 2

1. Graphic information can be presented in the form:

1. Analog form
2. Discrete form
3. Analog and discrete form

2. Graphic images are converted by spatial sampling:

1. analog to digital
2. digital to analog

3. What is the minimum object used in a bitmap graphics editor?

1. pixel;
2. Color palette;
3. object (rectangle, circle, etc.);
4. familiarity (symbol).

4. Primitives in a graphics editor are:

1. a graphical editor environment;
2. the simplest figures drawn with the help of special tools of the graphic editor;
3. operations performed on files containing images created in a graphical editor;
4. modes of operation of the graphical editor.

5. In the process of converting a graphic file, the number of colors decreased from 65,536 to 256. How many times will the information volume of the file decrease?

1. 2 times;
2. 4 times;
3. 8 times;
4. 16 times.

6. A raster image with a palette of 256 colors has a size of 20 * 20 pixels. What information volume does the image have?

1. 400 bit
2. 400 bytes
3. 256 bit
4. 102400 bit

7. Basic colors of the RGB palette:

1) blue, yellow, green

2) red, blue and green

3) red, yellow and green

4) cyan, yellow and magenta

8 ... The number of colors in the palette (N) and the amount of information required to encode each point (i) are related and can be calculated by the formula:

1) I = N ∙ 2

2) N = 2 ∙ i

3) N = 2 i

4) I = N 2

5) 2 = N i

9. The following parameters are set in the RGB color model: 255, 255, 255. What color will correspond to these parameters?

1. white
2. red
3. green
4. blue

10. To encode the background color of a web page, use the bgcolor = "# XXXXXX" attribute, where the hexadecimal values ​​of the intensity of the color components in the 24-bit RGB model are set in quotes. What is the background color of the page specified with the FF 0000 ”> tag?

1) white

2) green

3) red

Test on the topic: "Coding and processing of graphic information" Option 1 1. One of the main functions of a graphic editor is: 1) image scaling; 2) storage of the image code; 3) creating images; 4) viewing and displaying the contents of the video memory. 2. The elementary object used in the raster graphics editor is: 1) point (pixel); 2) an object (rectangle, circle, etc.); 3) a palette of colors; 4) familiarity (symbol) 3. The grid of horizontal and vertical columns, which is formed by pixels on the screen, is called: 1) video memory; 2) video adapter; 3) raster; 4) display processor; 4. Graphics with the representation of an image in the form of a set of objects is called: 1) fractal; 2) raster; 3) vector; 4) straightforward. 5. A pixel on the display screen is: 1) the minimum area of ​​the image, which can be independently assigned a color; 2) binary code of graphic information; 3) an electron beam; 4) a set of 16 phosphor grains. 6. Video controller is: 1) display processor; 2) a program that allocates video memory resources; 3) an electronic volatile device for storing information about a graphic image; 4) a device that controls the operation of a graphic display. 7 .... 1 2 3 4 5 6 7 8 Option 1 c a c c a d b b Option 2 b c b a d a b c

Test on the topic: "Coding and processing of graphic information"

Option 1

One of the main functions of the graphics editor is:

1. scaling images;

   storing the image code;

   creation of images;

   viewing and displaying the contents of video memory.

The elementary object used in the raster graphics editor is:

1. point (pixel);

   object (rectangle, circle, etc.);

   Color palette;

   familiarity (symbol)

The grid of horizontal and vertical columns, which is formed by pixels on the screen, is called:

1. video memory;

   video adapter;

   1. display processor;

Graphics with the representation of an image in the form of a collection of objects is called:

1. fractal;

   raster;

   vector;

   straightforward.

A pixel on the display screen is:

1. the minimum area of ​​the image, which can be independently assigned a color;

   binary code of graphic information;

   electron beam;

   a set of 16 phosphor grains.

A video controller is:

1. display processor;

   a program that allocates video memory resources;

   an electronic volatile device for storing information about a graphic image;

   a device that controls the operation of a graphic display.

The color of a dot on the display screen with a 16-color palette is formed from the signals:

1. red, green and blue;

   red, green, blue and brightness;

   yellow, green, blue and red;

   yellow, blue, red and brightness.

Which way of presenting graphical information is more economical in terms of memory usage:

1. raster;

   vector.

Test on the topic "Coding and processing of graphic information"

Option 2

Toolbar buttons, palette, working area, menu form:

1. full set of graphical primitives of a graphical editor;

   a graphical editor environment;

   a list of the graphical editor operating modes;

   a set of commands that can be used when working with a graphical editor.

The smallest element of the screen surface for which the address, color and intensity can be set is:

2. phosphor grain;

Deformation of the image when changing the size of the picture is one of the disadvantages:

1. vector graphics;

   raster graphics.

Video memory is:

1. an electronic device for storing the binary code of the image displayed on the screen;

   a program that allocates PC resources during image processing;

   a device that controls the operation of a graphic display;

   part of random access memory.

Graphics with the representation of an image in the form of collections of points is called:

1. straightforward;

   fractal;

   vector;

   raster.

What devices are included with the graphics adapter?

1. display processor and video memory;

   display, display processor and video memory;

   display processor, random access memory, backbone;

   backbone, display processor and video memory.

Primitives in a graphics editor are:

1. a graphical editor environment;

   the simplest figures drawn with the help of special tools of the graphic editor;

   operations performed on files containing images created in a graphical editor;

   modes of operation of the graphical editor.

1. What extension do the files of the graphics editor Paint have?

ANSWERS

Option 1