Test “Measuring information. Computer science test on the topic "Measuring information" (grade 7) Online test on the topic measuring information

Test in the discipline “Informatics and ICT”

Topic: “Measuring Information”

Question No: 1

How much information does a 10 character message contain?

composed using an eight-character alphabet?

Possible answers:

Question No: 2

Are 1024 bytes equal?

Possible answers:

Question No: 3

A group of schoolchildren came to the pool, which had 4 swimming lanes.

The coach said that the group would swim in lane number 3.

How much information did the students receive from this message?

Possible answers:

Question No: 4

You approached a traffic light, the light was yellow.

After that the light turned green.

How much information did you receive?

Possible answers:

Question No: 5

Smallest unit of information:

Possible answers:

Question No: 6

There are 8 balls in the basket. All balls are different colors.

How much information is conveyed by the message that a red ball was taken from the basket?

Possible answers:

Question No: 7

How much information is contained in the word CLASS,

recorded on a computer?

Possible answers:

Question No: 8

You approached a traffic light when the light was red.

Then the yellow light came on.

How much information did you receive?

Possible answers:

Question No: 9

In which of the sequences are the units of measurement indicated in ascending order:

Possible answers:

Megabyte, kilobyte, gigabyte, byte

Kilobyte, byte, bit, megabyte

Byte, megabyte, kilobyte, gigabyte

Byte, kilobyte, megabyte, bit

Byte, kilobyte, megabyte, gigabyte

Question No: 10

Is 1024 Kilobytes equal?

Possible answers:

Question No: 11

Assuming that each character is encoded by one byte, estimate the information volume of the following sentence from Pushkin’s quatrain (spaces count):

The singer-David was small in stature, but he knocked down Goliath!

Possible answers:

Question No: 12

Assuming that each character is encoded by one byte, estimate the information volume of the following quatrain (spaces count):

My uncle has the most honest rules,

When I seriously fell ill,

He forced himself to respect

And I couldn’t think of a better idea!

Possible answers:

103 KB

824 KB

Question No: 13

that the train arrives on one of the eight tracks?

Possible answers:

Question No: 14

How many bits of information does a message convey?

that classes will take place in one of 16 classrooms?

Possible answers:

Question No: 15

A telegram was received: “Meet car 7.”

It is known that the train has 16 cars.

How much information does this message convey?

Possible answers:

Answers

test topic

Units of measurement of information (translation)

item

Informatics

class/group

used sources and literature

FIPI materials

Key words or supporting concepts separated by commas (at least 5 pieces):

information, units of measurement, translation, bit, byte

methodological abstract

Some topics in the computer science course are covered at the beginning of the tenth grade (if taken in middle school or earlier), and the skills are used when completing the entire course and passing the Unified State Exam.

I suggest a five-minute activity that can be done at the beginning or end of the lesson.

Option 1

How many MB of information does a message of 2 to the 28th bit contain?

(The answer is one number).

How many bits of information does a 16 KB message contain?

(The answer is degree 2).

How many Kbits of information does a message of 2 to the 23rd byte contain?

(The answer is degree 2).

How many bytes of information does a 512 Gbit message contain?

(The answer is degree 2).

How many bytes of information does a 0.25 KB message contain?

(The answer is one number).

Option 2

How many kilobytes of information does a message of 2 to the 21th power of bits contain?

(The answer is one number).

How many bits of information does an 8 GB message contain?

(The answer is degree 2).

How many bytes of information does a 1 Mbit message contain?

(The answer is degree 2).

How many Mbits of information does a 0.25 Gbit message contain?

(The answer is one number).

Option 3

1. How many GB of information does a message of 2 to the 33rd bit contain?

(The answer is one number).

2. How many bits of information does a 512 MB message contain?

(The answer is degree 2).

3. How many Mbits of information does a message of 2 to the 27th power of bytes contain?

(The answer is degree 2).

4. How many bytes of information does a 4096 Kbit message contain?

(The answer is degree 2).

5. How many KB of information does a 0.25 MB message contain?

(The answer is one number).

Option 4

1. How many MB of information does a message of 2 to the 30th bit contain?

(The answer is one number).

2. How many bits of information does a 1024 KB message contain?

(The answer is degree 2).

3. How many Kbits of information does a message of 2 to the 21th power of bytes contain?

(The answer is degree 2).

4. How many bytes of information does a 32 Gbit message contain?

(The answer is degree 2).

5. How many bits of information does a 0.125 Kbit message contain?

(The answer is one number).

Option 5

1. How many KB of information does a message of 2 to the 24th power of bits contain?

(The answer is one number).

2. How many bits of information does a 32 GB message contain?

(The answer is degree 2).

3. How many Gbits of information does a message of 2 to the 35th power of bytes contain?

(The answer is degree 2).

4. How many bytes of information does a 128 Mbit message contain?

(The answer is degree 2).

5. How many MB of information does a 0.125 GB message contain?

(The answer is one number).

Option 6

1. How many GB of information does a message of 2 to the 39th power of bits contain?

(The answer is one number).

2. How many bits of information does a 64 MB message contain?

(The answer is degree 2).

3. How many Mbits of information does a message of 2 to the 26th power of bytes contain?

(The answer is degree 2).

4. How many bytes of information does a 512 Kbit message contain?

(The answer is degree 2).

5. How many Kbits of information does a 0.125 Mbit message contain?

(The answer is one number).

Option 7

1. How many MB of information does a message of 2 to the 33rd bit contain?

(The answer is one number).

2. How many bits of information does an 8192 KB message contain?

(The answer is degree 2).

3. How many Kbits of information does a message of 2 to the 18th power of bytes contain?

(The answer is degree 2).

4. How many bytes of information does a 16 Gbit message contain?

(The answer is degree 2).

5. How many bytes of information does a 0.5 KB message contain?

(The answer is one number).

Option 8

1. How many KB of information does a message of 2 to the 20th bit contain?

(The answer is one number).

2. How many bits of information does a 2 GB message contain?

(The answer is degree 2).

3. How many Gbits of information does a message of 2 to the 40th power of bytes contain?

(The answer is degree 2).

4. How many bytes of information does an 8192 Mbit message contain?

(The answer is degree 2).

5. How many Mbits of information does a 0.5 Gbit message contain?

(The answer is one number).

Option 9

1. How many GB of information does a message of 2 to the 37th bit contain?

(The answer is one number).

2. How many bits of information does an 8 MB message contain?

(The answer is degree 2).

3. How many Mbits of information does a message of 2 to the 24th power of bytes contain?

(The answer is degree 2).

4. How many bytes of information does a 4 Kbit message contain?

(The answer is degree 2).

5. How many KB of information does a 0.5 MB message contain?

(The answer is one number).

Option 10

How many MB of information does a message of 2 to the 25th power of bits contain?

(The answer is one number).

How many bits of information does a 4096 KB message contain?

(The answer is degree 2).

How many Kbits of information does a message of 2 to the 24th power of bytes contain?

(The answer is degree 2).

How many bytes of information does a 64 Gbit message contain?

(The answer is degree 2).

How many bits of information does a 0.25 Kbit message contain?

(The answer is one number).

Option 11

How many KB of information does a message of 2 to the 25th bit contain?

(The answer is one number).

How many bits of information does a 16 GB message contain?

(The answer is degree 2).

How many Gbits of information does a message of 2 to the 39th power of bytes contain?

(The answer is degree 2).

How many bytes of information does a 2 Mbit message contain?

(The answer is degree 2).

How many MB of information does a 0.25 GB message contain?

(The answer is one number).

Option 12

1. How many GB of information does a message of 2 to the 34th bit contain?

(The answer is one number).

2. How many bits of information does a 4 MB message contain?

(The answer is degree 2).

3. How many Mbits of information does a message of 2 to the 36th power of bytes contain?

(The answer is degree 2).

4. How many bytes of information does a 2048 Kbit message contain?

(The answer is degree 2).

5. How many Kbits of information does a 0.25 Mbit message contain?

(The answer is one number).

Option 13

1. How many MB of information does a message of 2 to the 26th power of bits contain?

(The answer is one number).

2. How many bits of information does a 128 KB message contain?

(The answer is degree 2).

3. How many Kbits of information does a message of 2 to the 15th power of bytes contain?

(The answer is degree 2).

4. How many bytes of information does a 128 Gbit message contain?

(The answer is degree 2).

5. How many bytes of information does a 0.125 KB message contain?

(The answer is one number).

Option 14

1. How many KB of information does a message of 2 to the 26th bit contain?

(The answer is one number).

2. How many bits of information does a 64 GB message contain?

(The answer is degree 2).

3. How many Gbits of information does a message of 2 to the 37th power of bytes contain?

(The answer is degree 2).

4. How many bytes of information does an 8 Mbit message contain?

(The answer is degree 2).

5. How many Mbits of information does a 0.125 Gbit message contain?

(The answer is one number).

Option 15

1. How many GB of information does a message of 2 to the 38th bit contain?

(The answer is one number).

2. How many bits of information does a 1024 MB message contain?

(The answer is degree 2).

3. How many Mbits of information does a message of 2 to the 30th power of bytes contain?

(The answer is degree 2).

4. How many bytes of information does a 32 Kbit message contain?

(The answer is degree 2).

5. How many KB of information does a 0.125 MB message contain?

(The answer is one number).

Option 16

1. How many MB of information does a message of 2 to the 29th power of bits contain?

(The answer is one number).

2. How many bits of information does a 2048 KB message contain?

(The answer is degree 2).

3. How many Kbits of information does a message of 2 to the 22nd byte contain?

(The answer is degree 2).

4. How many bytes of information does a 4 Gbit message contain?

(The answer is degree 2).

5. How many bits of information does a 0.5 Kbit message contain?

(The answer is one number).

Option 17

1. How many KB of information does a message of 2 to the 23rd bit contain?

(The answer is one number).

2. How many bits of information does a 1 GB message contain?

(The answer is degree 2).

3. How many Gbits of information does a message of 2 to the 38th power of bytes contain?

(The answer is degree 2).

4. How many bytes of information does a 16 Mbit message contain?

(The answer is degree 2).

5. How many MB of information does a 0.5 GB message contain?

(The answer is one number).

Option 18

1. How many GB of information does a message of 2 to the 36th power of bits contain?

(The answer is one number).

2. How many bits of information does a 128 MB message contain?

(The answer is degree 2).

3. How many Mbits of information does a message of 2 to the 23rd byte contain?

(The answer is degree 2).

4. How many bytes of information does a 256 Kbit message contain?

(The answer is degree 2).

5. How many Kbits of information does a 0.5 Mbit message contain?

(The answer is one number).

256

128

2048

1024

128

256

128

512

4096

8192

1024

256

128

512

The textbook on which the test tasks were compiled: Computer Science and ICT, grade 8 / I.G. Semakin, L.A. Zalogova, S.V. Rusakov, L.V. Shestakova – 3rd ed., revised. –M.: Binom. Knowledge Laboratory, 2009- 165 p.

1. The information volume of one character of the Russian alphabet is equal to...

1) 5bit

2) 1 byte

3) 1 bit

4) 3 bits

2. 1 KB (Kilobyte) is equal to...

1000 bytes

1024 bit

1000 MB

1024 bytes

3. 1 GB (Gigabyte) is equal to.. .

1024 KB

1024 MB

1,000,048 KB

1000 bytes

4. 1 Mbit is:

1) 1048576 bits

2) 153 KB

3) 1000000 bits

4)1000Kb

5 . In the alphabetical approach, the letter N denotes...

number of events

information weight of the symbol

alphabet power

number of characters in the text

6. 1 TB (Terabyte) is equal to...

1024 GB

1048 KB

1,000,048 MB

1000 MB

7. The largest unit of information in the sequence: byte, bit, Megabyte, Terabyte

1)byte

2) bit

3) Megabyte

4) Terabyte

8. 16 bits=

1.6 bytes

1MB

2 bytes

2 KB

9 . Byte, kilobyte, megabyte are units of information. Each subsequent unit of measurement of information is greater than the previous one in...

1)1000 times

2) 100 times

3)1024 times

4)8 times

10 . The volume of information in a book in which there are 80 pages, and each page has 40 lines and each line has 60 characters is equal to...

1)24 000 bytes

2) 1000bit

3)1MB

4)0.5TB

11. The correct formula for calculating the amount of information

1)N = 2 n

2)K*i=Q

3) N = 2 i

12. The largest unit of information used in hard drives.... 1) MB

2) TB

3) KB

4) GB

13. In the word CERTIFICATION…. bit

1) 10

2) 7

3)64

4) 80

14. The phrase “Patience and labor will grind everything down” contains ..... byte

1) 28

2) 30

3)1

4) 58

15. Minimum unit of measurement of the amount of information

1) KB

2) bit

3) baud

4) bar

16 . In the word “TERABYTE” ..... bit

1) 8

2) 64

3) 32

4) 48

17. The message “Winter Olympics in Sochi 2014!” was displayed on the board. The information volume of this message is…

1) 20

2) 22

3) 21

4) 29

18 . 1 byte is equal to...

1) 1024 KB

2) 10 bits

3) 8 bits

19. The Olympic flag has 5 rings of different colors. The information that the ring is blue is...

20. The box contains 32 pencils of different colors. The information that an orange pencil was taken out is...

21 . Message volume 2 23 bit equals ... MB

1)1

2) 2

3)3

4)8

22. The number of characters in the text, if its information volume is 2 KB, is...

1) 1000

2) 256

3)1024

4) 2048

23. The power of the English alphabet is...

1)32

2) 26

3)20

4)33

24. Message volume 2 35 bit is equal to ... GB

1)4

2) 8

3)16

4) 32

25. In ratio 8 X =2MB, x is equal to

1)5

2) 6

3)7

4)8

26 . The information volume of a test with an alphabet capacity of 256 characters and 100 characters is equal to

1)100 bytes

2) 100 bits

3)1kbyte

4)256,000 bytes

27. An information message of 12288 bits corresponds to

1)12bytes

2) 12Kbit

3)1KB

4) 1000 bits

28. With an alphabet power of 64, a text consisting of 80 characters contains...

64 bits

60 bytes

80 bit

10 bytes

29 . The Yumbu alphabet contains only 8 letters. One letter of this alphabet carries a volume of information equal to...

1)1 bit

2) 2bit

3)3 bits

4) 1 byte

30. The Abakura alphabet contains only 64 letters. One letter of this alphabet carries a volume of information equal to...

1) 1 bit

2) 2 bits

3) 3 bits

4) 1 byte

Evaluation of the result:

Mark "5" - 28-30 correct answers;

Mark "4" - 24-27 correct answers;

Mark "3" - 18-23 correct answers.

Test on the topic

"Coding and Measuring Information"

Purpose of the test:

1) assess the level of general educational training in the sections: “Coding text information”, “Coding graphic information”, “Coding audio information”;

2) promote the development of students’ mental activity (classification of types of information according to the form of presentation, analysis of methods for solving problems on calculating the amount of information of various types, generalization of all methods, action by analogy when considering problems on various types of information, systematization of knowledge on the topic “Information Coding”) ;

3) apply knowledge when solving practical problems on transmitting information over the Internet and storing information in computer memory;

4) differentiated approach (increasing the difficulty of tasks from option 1 to option 4).

Instructions for students

This test checks:

1) understanding of the principle of discrete (digital) representation of information;

2) understanding the relationship between the power of the alphabet and the amount of information; required for one element of the alphabet;

3) the ability to calculate the amount of information of various types,

4) knowledge of units of measurement of quantity and speed of information transmission,

5) the ability to solve practical problems on transmitting information over the Internet.

The test consists of 10 tasks. In tasks No. 1 and No. 3-No. 9, you must choose one correct answer from 4 proposed ones. In task No. 2 you need to establish a correspondence and enter a sequence of letters in the answer. In tasks No. 10-No. 11, write down your answer. The solution to problem No. 11 can be found experimentally using a computer. You have 40 minutes to complete the test.

Test evaluation criteria:

Option 1

1. What is the name of information about the world around us that is perceived by a person directly or with the help of special devices?

2. Match the amount of information with the power of the corresponding alphabet:

1) life experience;

2) information;

3) abstract;

4) encyclopedia.

1) information weight; A) the number of colors in the palette;

2) sound coding depth; B) number of characters;

3) bit depth. C) the number of pitches (or volumes).

3. What is the largest number of different characters that can be used in text if one character of the text is encoded by 1 byte?

4. How many bits are required to encode 1 character if there are 65 colors in the palette?

5. What is the information volume of a mono audio file, the sound duration of which is 30 seconds, the encoding depth is 16 bits and the sampling frequency is 22,050 Hz?

6. What is the bit depth of color required to store a 4 color image?

7. To store text consisting of 20480 characters, 10 KB of memory were used. What is the maximum power of the alphabet with which this text is written?

9. How long will it take to transfer a 512 KB file over the network if the Internet connection speed is 2 Mbit/s?

10. How much does it cost to transfer a 4 MB digital photograph via mobile Internet, which costs 9.9 rubles per 1 MB?

1) 1323 bytes;

2) 1323 KB;

3) 1.5 MB;

4) 1292 KB.

1) 2 characters;

1) 4 characters;

3) 8 characters;

4) 16 characters.

1) reduce the playing time by 1 minute;

3) reduce the sampling frequency by 2 times;

4) increase the sampling frequency by 4 times.

1) 2 seconds;

2) 4 seconds;

3) 8 seconds;

4) 16 seconds.

Answer: _________ rub.

11. What is the volume of a file containing a sentence of 5 words containing 26 letters. The file was created in the standard Notepad program. You can use a computer to solve the problem.

Answer: _________ Byte.

Option2

1. What is the process of converting a continuous sound wave into a sequence of results of measurements of a physical quantity at fixed times called?

1) coding;

2) symbolization;

3) sampling;

4) pixelation.

2. Match each type of information with the smallest element that forms it:

1) text information; A) one pixel;

2) graphic information; B) pitch or volume of sound in

a given moment in time;

3. What is the maximum number of different sounds that can be encoded using a 16-bit encoding depth?

4. What is the information weight of one character of the text if the alphabet with which this text is written contains 17 characters?

5. What is the information volume of a stereo sound file, the sound duration of which is 2 minutes, the encoding depth is 32 bits, and the sampling frequency is 44100 Hz?

6. How many characters are there in a text whose information volume is 2 KB, and the information weight of one character is 8 bits?

7. To store a mono audio file lasting 3 minutes, 500 KB of memory were allocated. What is the maximum possible number of different sounds used if encoding was done at a sampling rate of 11,025 Hz?

8. What can be done to reduce the information volume of a sound file by 2 times?

9. How long will it take to transfer a 240 MB file over the network if the Internet connection speed is 2 Mbit/s?

10. How much does it cost to transfer 5 MB of text via the mobile Internet, which costs 9.9 rubles per 1 MB?

3) sound information. B) one character.

1) 10.1 MB;

2) 20.2 MB;

3) 344.5 KB;

4) 789 KB.

1) reduce the playing time by 2 times;

2) increase the coding depth by 2 times;

3) increase the playing time by 2 times;

4) reduce the sampling frequency by 4 times.

1) 2 minutes;

2) 4 seconds;

3) 16 seconds;

4) 16 minutes.

Answer: _________ rub.

11. What is the size of the file that is obtained after coloring a 46 KB black and white drawing created in the standard Paint program? The attributes of the picture and the file type did not change. You can use a computer to solve the problem.

Answer: _________ Kbytes.

Option 3

1. What is the smallest unit of measurement of information called?

2. Match each smallest element of information with the amount of information that measures it:

1) one pixel; A) sound coding depth;

2) one character; B) bit depth;

3) height or loudness B) information weight.

at a given moment in time.

3. What is the largest number of different characters that can be used in a text if one character is encoded in 2 bytes?

4. What is the audio coding depth if it is possible to encode 256 sounds?

5. What is the information volume of a text containing 2 pages of 25 lines, each line containing 40 characters, if the information weight of 1 character is 2 bytes?

6. What is the playing time of a mono file, the information volume of which is 4 MB, the sampling frequency is 22050 Hz, and the encoding depth is 16 bits?

7. To store text consisting of 4098 characters, 2 KB of memory were allocated. What is the maximum power of the alphabet?

8. What size of the picture should be chosen so that the information volume of a graphic file of 1024x768 pixels is reduced by 2 times?

9. How long will it take to transfer a 540 MB file over the network if the Internet connection speed is 4 Mbit/s?

10. How much does it cost to transfer a 6 MB audio file via the mobile Internet, which costs 9.9 rubles per 1 MB?

1) 3.9 KB;

2) 31.25 KB;

3) 1.5 MB;

4) 1.9 MB.

1) 48 seconds;

2) 96 seconds;

3) 1 minute;

4) 1.6 minutes.

1) 16 characters;

2) 8 characters;

3) 32 characters;

4) 4 characters.

1) 9 seconds;

2) 16 minutes;

3) 18 minutes;

4) 18 seconds.

Answer: _________ rub.

11. What is the volume of a file containing 2 sentences of 4 words each, containing 43 letters. The file was created in the standard Notepad program. You can use a computer to solve the problem.

Answer: _________ Byte.

Option 4

1.What is the name of the set of elements used to present information?

1) alphabet;

2) alphabet;

4) list.

2. Match each type of information with the power of its alphabet:

3. What is the maximum number of colors in the palette if the bit depth is 5 bits?

4. What is the audio coding depth if it is possible to encode 65536 sounds?

5. What is the information volume of a graphic file of size 1600x900 if the color depth is 24 bits?

1) text information; A) the number of colors in the palette;

2) graphic information; B); number of pitches (or volumes);

3) sound information. B) number of characters.

1) 16.1 KB;

2) 32.2 KB;

3) 4.1 MB;

4) 32.9 MB.

6. What is the playing time of a stereo file, the information volume of which is 8 MB, the sampling frequency is 44,100 Hz, and the encoding depth is 32 bits?

7. What is the maximum possible number of colors in the palette of a raster image of size 512x512 pixels, if 4 KB of memory were allocated for storing it?

8. How many characters must the text be shortened so that its information volume decreases by 10 KB, provided that one character of the text is encoded in 2 bytes?

9. How long will it take to transfer a 2 GB file over the network if the Internet connection speed is 50 Mbit/s?

10. How much does it cost to transfer 4 digital photos of 3 MB each via mobile Internet, which costs 9.9 rubles per 1 MB?

1) 23.8 seconds;

2) 47.6 seconds;

3) 1 minute;

4) 1.5 minutes.

1) 300 seconds;

2) 5.5 minutes;

3) 87.4 seconds;

4) 16 seconds.

Answer: _________ rub.

11. What is the size of the file that is obtained after coloring a black and white drawing and resizing the details of the drawing created in the Paint program? The initial file size is 74 KB. The attributes of the picture and the file type did not change. You can use a computer to solve the problem.