Test Information and information processes 8th grade consists of 26 questions and is intended to test the results of learning in computer science in the 8th grade on the relevant topic.
1. Which of the following statements most accurately reveals the meaning of the concept “information” from an everyday point of view?
a) a sequence of characters of some alphabet
b) library book collection
c) information about the surrounding world and the processes occurring in it, perceived by a person directly or with the help of special devices
d) information contained in scientific theories
2. A signal is called continuous:
c) carrying textual information
3. A signal is called discrete:
a) taking a finite number of specific values
b) continuously changing over time
c) which can be decoded
d) carrying any information
4. Information that does not depend on personal opinion or judgment is called:
a) understandable
b) relevant
c) objective
d) useful
5. Information that is significant and important at the moment is called:
a) useful
b) relevant
c) reliable
d) objective
6. Based on the way a person perceives, the following types of information are distinguished:
a) textual, numerical, graphical, tabular, etc.
b) scientific, social, political, economic, religious, etc.
c) ordinary, production, technical, managerial
7. It is known that a physically healthy person receives the greatest amount of information with the help of:
a) hearing organs
b) organs of vision
c) organs of touch
d) olfactory organs
d) taste buds
8. Indicate the “extra” object from the point of view of the agreement on the meaning of the signs used:
a) letters
b) road signs
c) numbers
d) musical notes
9. Indicate the “extra” object in terms of the type of writing:
a) Russian language
b) English
c) Chinese
d) French
10. Formal languages include:
a) Russian language
b) Latin
c) Chinese
d) French
11. According to the form of presentation, information can be divided into the following types:
a) mathematical, biological, medical, psychological, etc.
b) symbolic and figurative
c) everyday, scientific, production, management
d) visual, auditory, tactile, olfactory, gustatory
12. Discretization of information is:
a) a physical process that changes over time
b) quantitative characteristic of the signal
c) the process of converting information from continuous form to discrete form
d) the process of converting information from discrete form to continuous
13. Give the most complete answer.
At binary coding The alphabet used is:
a) 0 and 1
b) the words YES and NO
c) signs + and −
d) any two characters
14. How many different sequences of plus and minus symbols are there, exactly six characters long?
a) 64
b) 50
c) 32
d) 20
15. For five letters of the Latin alphabet, their binary codes are given (for some letters - from two bits, for some - from three bits). These codes are presented below:
A - 000, B - 01, C - 100, D - 10, E - 011
Determine which set of letters is encoded in a binary string 0110100011000
.
a) EWSEA
b) BDDEA
c) BDCEA
d) EBAEA
16. The chessboard consists of 8 columns and 8 rows. What is the minimum number of bits required to encode the coordinates of one chess field?
a) 4
b) 5
at 6
d) 7
17. In which line are the units of measurement of information arranged in ascending order?
a) gigabyte, megabyte, kilobyte, byte, bit
b) bit, byte, megabyte, kilobyte, gigabyte
c) byte, bit, kilobyte, megabyte, gigabyte
d) bit, byte, kilobyte, megabyte, gigabyte
18. The message size is 11 KB. The message contains 11,264 characters. What is the power of the alphabet with which the message is written?
a) 64
b)128
c) 256
d) 512
19. A text of 600 characters is given. It is known that the characters are taken from a table of size 16 x 32. Determine the information volume of the text in bits.
a) 1000
b) 2400
c) 3600
d) 5400
20. Two texts contain the same number of characters. The first text is composed of alphabet characters with a power of 16, and the second text is composed of alphabet characters with a power of 256. How many times is the amount of information in the second text greater than in the first?
a) 12
b) 2
c) 24
d) 4
21. Information processes- This:
a) processes of construction of buildings and structures
b) processes of chemical and mechanical water purification
c) processes of collecting, storing, processing, searching and transmitting information
d) electricity production processes
22. By information carrier we usually mean:
a) communication line
b) the Internet
c) computer
d) a material object on which information can be recorded in one way or another
23. Which line correctly represents the information transfer scheme?
a) source → encoder → decoder → receiver
b) source → encoder → communication channel → decoder → receiver
c) source → encoder → interference → decoder → receiver
d) source → decoding device → communication channel → encoding device → receiver
24. Hypertext is:
a) very large text
b) text in which links can be followed
c) text typed on a computer
d) text that uses a large font size
25. Search engine NOT is:
a) Google
b) FireFox
c) Rambler
d) Yandex
26. The table shows requests to search engine. What query will it be found for? greatest number corresponding pages?
a) breeding & keeping & swordtails & catfish
b) content & swordtails
c) (contents & swordtails) | catfish
d) keeping & swordtails & catfish
Answers to the test Information and information processes, grade 8
1-in
2-b
3-a
4-in
5 B
6-g
7-b
8-b
9-in
10-b
11-b
12-v
13th
14-a
15-v
16-v
17-g
18-v
19th
20-b
21-v
22-g
23-b
24-b
25-b
26-v
, Rules of the chronicle - the article must be corrected!
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INFORMATION. INFORMATION PROCESSES.
FINAL TEST.
1. Information presented in a language accessible to the recipient is called:
2. Information that does not depend on personal opinion or judgment is called:
reliable; relevant; objective; full; understandable.
3. Information that reflects the true state of affairs is called:
full; useful; relevant; reliable; understandable.
4. Information that is significant and important at the moment is called:
full; useful; relevant; reliable; understandable.
5. A person receives the greatest amount of information through:
hearing organs; organs of vision; organs of touch; olfactory organs; taste buds.
6. A person receives tactile information through:
special devices; thermometer; barometer; organs of touch; hearing organs.
7. A signal is called analog if
8. A signal is called discrete if
it can take on a finite number of specific values; it continuously changes in amplitude over time; it carries textual information; it carries any information; this is a digital signal.
9. Converting continuous images and sound into a set of discrete values in the form of codes is called -
coding; sampling; decoding; informatization.
10. Vo internal memory computer presentation of information
continuously; discretely; partly discrete, partly continuous; information is presented in the form of symbols and graphs.
11. An analog signal is:
traffic light signal; SOS signal; beacon signal; electrocardiogram; road sign.
12. The discrete signal generates:
barometer; thermometer; speedometer; traffic light.
13. Temperature measurement is:
information storage process; process of information transfer; process of obtaining information; information security process; process of using information.
14. Translation of text from in English in Russian it can be called:
information storage process; process of information transfer; process of obtaining information; information security process; information processing process.
15. Exchange of information is:
doing homework; watching a TV program; observing the behavior of fish in the aquarium; talking on the phone.
16. Formal languages include:
English language; programming language; sign language; Russian language; Chinese.
17. The main difference between formal languages and natural languages:
there are strict rules of grammar and syntax; the number of characters in each word does not exceed a certain fixed number; each word has no more than two meanings; each word has only one meaning; Every word has only one meaning and there are strict rules of grammar and syntax.
18. Binary number 100012 corresponds to a decimal number
1110 1710 25610 100110 1000110
19. The number 248 corresponds to the number
1011016 2016 7616 BF16 1416
20. Which number is odd:
FF16 22610 3778 111111112
21. Indicate the largest number:
14416 14410 1448 1446
22. The unit of information quantity is taken to be:
byte bit baud bytes
23. In which sequence are units of measurement indicated in ascending order?
gigabyte, kilobyte, megabyte, byte gigabyte, megabyte, kilobyte, byte megabyte, kilobyte, byte, gigabyte byte, kilobyte, megabyte, gigabyte
KEY:
1-5 2-3 3-4 4-3 5-2 6-4 7-2 8-1 9-2 10-2 11-4 12-4 13-3 14-5 15-4 16-2 17-5 18-2 19-5 20-2 21-1 22-2 23-4
Answers to test 1 in Computer Science 7th grade
Answers to test 1 in Computer Science, grade 7 - this is a guide for parents for checking answers children (GDZ) on “Test questions for self-control”, specified in Computer Science textbook. According to the authors of the textbook ( L.L.Bosova, A.Yu.Bosova) at the end of each chapter are given test tasks, which will help assess whether students have mastered the theoretical material well and whether they can apply their knowledge to solve emerging problems.
Answers on questions will help parents quickly check the completion of these tasks.
1. Which of the following statements most accurately reveals the meaning of the concept “information” from an everyday point of view?
a) a sequence of characters of some alphabet
b) library book collection
c) information about the surrounding world and the processes occurring in it, perceived by a person directly or with the help of special devices
d) information contained in scientific theories
CORRECT ANSWER: c) information about the surrounding world and the processes occurring in it, perceived by a person directly or with the help of special devices
2. A signal is called continuous:
c) carrying textual information
CORRECT ANSWER: b) continuously changing over time
3. A signal is called discrete:
a) taking a finite number of specific values
b) continuously changing over time
c) which can be decoded
d) carrying any information
CORRECT ANSWER: a) taking a finite number of specific values
4. Information that does not depend on personal opinion or judgment is called:
a) understandable
b) relevant
c) objective
d) useful
CORRECT ANSWER: c) objective
5. Information that is significant and important at the moment is called:
a) useful
b) relevant
c) reliable
d) objective
CORRECT ANSWER: b) relevant
6. Based on the way a person perceives, the following types of information are distinguished:
a) textual, numerical, graphical, tabular, etc.
b) scientific, social, political, economic, religious, etc.
c) ordinary, production, technical, managerial
CORRECT ANSWER: d) visual, auditory, tactile, olfactory, gustatory
7. It is known that a physically healthy person receives the greatest amount of information with the help of:
a) hearing organs
b) organs of vision
c) organs of touch
d) olfactory organs
CORRECT ANSWER: b) organs of vision
8. Indicate the “extra” object from the point of view of the agreement on the meaning of the signs used:
a) letters
b) road signs
c) numbers
d) musical notes
CORRECT ANSWER: b) road signs
9. Indicate the “extra” object in terms of the type of writing:
a) Russian language
b) English
c) Chinese
d) French
CORRECT ANSWER: c) Chinese language
10. Formal languages include:
a) Russian language
b) Latin
c) Chinese
d) French
CORRECT ANSWER: b) Latin
11. According to the form of presentation, information can be divided into the following types:
a) mathematical, biological, medical, psychological, etc.
b) symbolic and figurative
c) everyday, scientific, production, management
d) visual, auditory, tactile, olfactory, gustatory
CORRECT ANSWER: b) symbolic and figurative
12. Discretization of information is:
a) a physical process that changes over time
b) quantitative characteristic of the signal
c) the process of converting information from continuous form to discrete form
d) the process of converting information from discrete form to continuous
CORRECT ANSWER: c) the process of converting information from continuous to discrete form
13. Give the most complete answer. Binary coding uses an alphabet consisting of:
a) 0 and 1
b) the words YES and NO
c) signs + and -
d) any two characters
CORRECT ANSWER: d) any two characters
14. How many different sequences of plus and minus symbols are there, exactly six characters long?
a) 64
b) 50
c) 32
d) 20
CORRECT ANSWER: a) 64
15. For five letters of the Latin alphabet, their binary codes are given (for some letters - from two bits, for some - from three bits). These codes are presented in the table:
CORRECT ANSWER: B.
16. The chessboard consists of 8 columns and 8 rows. What is the minimum number of bits required to encode the coordinates of one chess field?
a) 4
6) 5
at 6
d) 7
CORRECT ANSWER: c) 6
17. In which line are the units of measurement of information arranged in ascending order?
a) gigabyte, megabyte, kilobyte, byte, bit
b) bit, byte, megabyte, kilobyte, gigabyte
c) byte, bit, kilobyte, megabyte, gigabyte
d) bit, byte, kilobyte, megabyte, gigabyte
CORRECT ANSWER: d) bit, byte, kilobyte, megabyte, gigabyte
18. The message size is 11 KB. The message contains 11,264 characters. What is the power of the alphabet with which the message is written?
a) 64
6) 128
c) 256
d) 512
CORRECT ANSWER: c) 256
19. A text of 600 characters is given. It is known that the symbols are taken from a table of size 16 x 32. Determine the information volume of the text in bits.
a) 1000
6) 2400
c) 3600
d) 5400
CORRECT ANSWER: d) 5400
20. Two texts contain the same number of characters. The first text is composed of alphabet characters with cardinality 16, and the second text is composed of alphabet symbols with cardinality 256. How many times more information is in the second text than in the first?
a) 12
6) 2
c) 24
d) 4
CORRECT ANSWER: 6) 2
21. Information processes are:
a) processes of construction of buildings and structures
b) processes of chemical and mechanical water purification
c) processes of collecting, storing, processing, searching and transmitting information
d) electricity production processes
CORRECT ANSWER: c) processes of collecting, storing, processing, searching and transmitting information
22. By information carrier we usually mean:
a) communication line
b) the Internet
c) computer
d) a material object on which information can be recorded in one way or another
CORRECT ANSWER: d) a material object on which information can be recorded in one way or another
23. Which line correctly represents the information transfer scheme?
a) source -> encoder -> decoder -> receiver
b) source -> encoder -> communication channel -> decoder -> receiver
c) source -> encoder -> interference -> decoder -> receiver
d) source -" decoding device -" communication channel -" encoding device -> receiver
CORRECT ANSWER: b) source -> encoding device -> communication channel -> decoding device -> receiver
24. Hypertext is:
a) very large text
b) text in which links can be followed
c) text typed on a computer
d) text that uses a large font size
CORRECT ANSWER: b) text in which links can be followed
25. A search engine is NOT:
a) Google
b) FireFox
c) Rambler
d) Yandex
CORRECT ANSWER: b) FireFox
26. Queries to the search engine are given. Which query will find the largest number of matching pages?
a) breeding & keeping & swordtails & catfish
b) content & swordtails
c) (content & swordtails)] catfish
d) keeping & swordtails & catfish
CORRECT ANSWER: c) (content & swordtails)] catfish
Have you watched “(L.L. Bosova, Answers to Questions)”
Properties of information are nothing more than signs of information - its qualitative characteristics.
These properties are closely interrelated:
- objectivity - subjectivity,
- reliability - unreliability,
- completeness - incompleteness,
- relevance - irrelevance,
- value - uselessness,
- clarity - incomprehensibility.
Objectivity. Information is objective if it does not depend on anyone’s opinion or judgment.
Example. The message “It’s warm outside” carries subjective information, and the message “It’s 22 degrees Celsius outside” carries objective information (if the thermometer is working). Objective information can be obtained using working sensors and measuring instruments. But, reflected in the consciousness of a particular person, information ceases to be objective and becomes subjective, since it is transformed depending on the opinion, judgment, experience, and knowledge of a particular subject.
Credibility. Information is reliable if it reflects the true state of affairs.
Example. While talking on the phone, noise interferes with hearing the interlocutor, which makes it impossible to accurately perceive the information; in this case, the information will be unreliable. Objective information is always reliable; but reliable information can be both objective and subjective. Reliable information helps us make the right decision. Information may be inaccurate for the following reasons:
- deliberate distortion (disinformation);
- distortion due to interference (“damaged phone”);
- unintentional distortion (rumors, stories, fishing stories).
Completeness. Information can be called complete if it is sufficient to understand the situation and make a decision. For example, a historian's dream is to have full information about past eras. But historical information is never complete, and the completeness of information decreases as the historical era moves away from us. Even events that took place before our eyes are fully documented, much is forgotten, and memories are distorted. Incomplete information may lead to an erroneous conclusion or decision.
Relevance(timeliness) of information is important, material for the present time.
Example. The message “It’s raining outside now” is relevant to a person who is going to go outside, but not relevant to a person who is going to stay at home. Only timely information received can bring the necessary benefits, for example, warnings about earthquakes, hurricanes, and other natural disasters. Information may be outdated for two reasons: it may be outdated (last year's newspaper) or insignificant, unnecessary (for example, a message that prices in Italy have been reduced by 5%).
Usefulness or uselessness. Since there is no boundary between these concepts, we should talk about the degree of usefulness in relation to the needs of specific people. The usefulness of information is assessed by the tasks that we can solve with its help.
Example. The message “There will be a math test tomorrow” is useful for a student - he can prepare, but it is useless to him if he has a fever and does not go to school.
The most valuable information for us is quite useful, complete, objective, and reliable. At the same time, let us take into account that a small percentage of useless information even helps, allowing you to rest on uninformative sections of the text. And the most complete, most reliable information cannot be new.
Understandability. Information is understandable if it is expressed in a language understandable to the recipient.
Example. Music notation for a music school student carries clear information. But for a student unfamiliar with musical notation, this information will simply be incomprehensible.
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1. Economic information is information...
characterizing production relations in society
necessary for solving various kinds of economic problems
arising in various areas of economic activity
2. The efficiency of information reflects
relevance of information for necessary calculations and decision-making in changed conditions
average time for collecting and transmitting economic information in the information system
speed of bringing economic information to the consumer
3. Information reflecting the true state of affairs
Reliable
Current
Objective
Useful
Understandable
4. An example of information processes – processes...
construction of buildings and structures
chemical water purification
receiving, searching, storing, transmitting, processing and using information
electricity production
extraction of minerals from the bowels of the Earth
5. The functional components of an economic information system mean a system...
management functions - a complete set (complex) of management work interconnected in time and space, necessary to achieve the goals set for the enterprise
time-related functions that describe technological processes information processing in an information system
functions characterizing the processes of collecting, transmitting, processing and bringing information to the consumer
6. By information carrier we mean...
communication line
information process parameter
personal computer storage device
computer
a material substance that can be used to record, store and/or transmit information
intangible information that stores data about a person
7. Types of information systems depending on the degree of automation
Manual
Manual
Automatic
Automated
semi-automated
8. An information system is...
system for storing information about a specific object
information production system
a communication system for collecting, transmitting, and processing information about a specific object, providing workers with information to implement management functions
9. Economic informatics is a science...
about the processes of obtaining economic information using computer and organizational technology
studying methods of automated processing of economic information using computer and organizational technology
studying methods of studying economic structures in order to identify places where information arises
10. Information presented in a language understandable to the recipient
Reliable
Current
Objective
Useful
Understandable
11. Automated Information system- This …
an information processing system that involves complete automation of any sphere of human activity
a set of information arrays, technical, software and language tools intended for collecting, storing, searching, processing and issuing data according to user requests
information processing system that involves automation of data collection, storage, retrieval and retrieval
12. The accuracy of information means...
degree of permissible distortion of information
correct display of economic information
unambiguous perception of information by all users
13. Information technology- this is a system...
user interaction when solving applied problems
methods and methods of collecting, accumulating, storing, searching, processing and issuing information
methods and methods for solving applied economic problems
14. Information not subject to personal opinion or judgment
Reliable
Current
Objective
Useful
Understandable
15. Types of economic information
accounting
valuable
regulatory and technical
reliable
directive
planned
statistical
economic planning
16. Economic information? this is information...
characterizing the results of economic activity
characterizing production relations in society
financial, labor and natural resources
17. The simplest and most common type of architectural and technological solutions for constructing automated workstations is based on...
mainframe computers
small computers
personal computers
18. Requirements characterizing economic information
Efficiency
Accuracy
Credibility
value
reliability
adequacy
19. Information sufficient to solve the problem
Reliable
Current
Objective
Full
Understandable
20. Information Support- This …
a set of governing documents used at the enterprise and form the basis of the database
a set of methods and means for placing and organizing information, including classification and coding systems, unified systems documentation, rationalization of document flow and document forms, methods for creating an in-machine information base of an information system
a set of planning-accounting, normative-reference and reporting-statistical information, systematized and presented in the intramachine sphere
21. Information is significant and important at the moment
Reliable
Current
Objective
Useful
Understandable
22. Information with which you can solve the problem
Reliable
Current
Objective
Useful
Understandable
23. Based on the place of origin, economic information is divided into:
input
intermediate
day off
unknown
24. Software A computer is a collection of programs...
procedures and rules, together with the documentation associated with these components, allowing the use of a computer to solve various problems
allowing the use of computers to solve various problems
and documentation that allows you to use a computer to solve various problems
25. Types of economic information
Accounting
Valuable
Regulatory and technical
Reliable
Directive
Planned