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# MEI Informatics Test 34 assignments on 5 questions

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**21.04.2018**

Content: Карт.отв.Информатика.doc 154 kB

## Description

Exercise 1

Question 1. In what form does PC (PC) receive information?

1. in the form of discrete signals (digital computer);

2. in the form of continuous signals (analog computer);

3. Basically, in the form of discrete signals, and sometimes - in the form of continuous signals;

4. basically, in the form of continuous signals, and sometimes - in the form of discrete signals

5. There is no correct answer.

Question 2. What is a bit?

1. the bit can take any value;

2. bit is an elementary unit of information measurement, the bit value is the number 1;

3. The bit is an elementary unit of information measurement, the bit value is the number 0;

4. a bit is an elementary unit of information measurement, the bit value is an octal number of 2;

5. a bit is an elementary unit of information measurement, the bit value is the number 0 or 1.

Question 3. To measure large amounts of information use units such as Kilobyte, Megabyte, Gigabyte. What is the kilobyte?

1. 1 kilobyte = 1000 bytes, or 103 bytes;

2. 1 Kilobyte = 1,000,000 bytes, or 106 bytes;

3. 1 Kilobyte = 1000000000 bytes, or 109 bytes;

4. 1 Kilobyte = 1024 bytes, or 210 bytes;

5. 1 Kilobyte = 1048576 bytes, or 220 bytes.

Question 4. What is the difference between decimal, binary, octal and hexadecimal number systems?

1. The bases of these numbers are, respectively, the numbers 10, 2, 8, 16. When writing numbers in the decimal system, digits from 0 to 9 are used; In a binary system, any number is written as a sequence of 0 and 1; in the octal system, numbers from 0 to 7 are used to write numbers; in the hexadecimal system, the numbers can be written with 16 characters - digits from 0 to 9 and Latin letters from A to F;

2. The bases of these numbers are, respectively, the numbers 10, 2, 8, 16. When writing numbers in the decimal system, numbers from 0 to 10 are used; In a binary system, any number is written as a sequence of 0 and 1; in the octal system, numbers from 0 to 8 are used to write numbers; In the hexadecimal system, the numbers can be written in digits from 0 to 16.

3. The bases of these numbers are, respectively, the numbers 10, 2, 8, 16. When writing numbers in the decimal system, digits from 0 to 8 are used; In a binary system, any number is written as a sequence of 0 and 1; in the octal system, numbers from 0 to 10 are used to write numbers; In the hexadecimal system, the numbers can be written in digits from 0 to 16.

4. The bases of these numbers are, respectively, the numbers 10, 2, 8, 16. When writing numbers in the decimal system, digits from 0 to 9 are used; In a binary system, any number is written as a sequence of 0 and 1; in the octal system, numbers from 0 to 8 are used to write numbers; in a hexadecimal system, the numbers can be written in digits from 0 to 17. In computing, only the decimal number system is used.

5. The bases of these numbers are, respectively, the numbers 10, 2, 8, 16. When writing numbers in the decimal system, the digits from 0 to 9 are used; In a binary system, any number is written as a sequence of 0 and 1; in the octal system, numbers from 0 to 8 are used to write numbers; In the hexadecimal system, the numbers can be written in digits from 0 to 16.

Question 5. The decimal number 30 will be written in the binary system as:

1. 10011;

2. 11110;

3. 10101;

4. 100111;

5. 100001.

Activity 2

Question 1. An elementary unit of measuring the amount of information is:

1. Byte;

2. Kbyte;

3. Mbyte;

4. Bit;

5. Eight bits.

Question 2. The following numbering systems are given: with bases 2, 8, 10, 16. A record of the form 100

1. absent in the binary;

2. exists in all listed;

3. absent in the decimal;

4. Missing in octal;

5. absent in the 16th.

Question 3. If the test version on the average has a volume of 20 kilobytes (on each page of the test 40 lines of 64 symbols in each, 1 symbol occupies 1 byte), then the number of pages in the test is equal (the answer is rounded up to the whole page): 1. 1

## Additional information

Activity 34

Question 1. Why is it better to use variables instead of constants?

1. Since constants take up more memory;

2. Since if you change the value of a constant in the source program, you will need to change each operator, in which this constant was used;

3. Since when using constants, the program runs slower;

4. because of the reasons listed in paragraphs 1 and 3;

5. There is no correct answer.

Question 2. What is a syntax error in the program?

1. This is an error caused by the mismatch of the constructions used in the program, the rules of the language;

2. This is an error caused by the fact that memory is not reserved for arrays or initial values were not given to variables used in the program;

3. This is an error caused by a loop, when the program can not exit the loop;

4. This is an error caused by incorrect use of labels or line numbers of the program;

5. There is no correct answer.

Question 3. Why do tests (test cases) and debug printing?

1. to detect program errors;

2. to localize program errors;

3. to detect and localize program errors;

4. for the preparation of documentation for the program;

5. There is no correct answer.

Question 4. In which cases is the loop used for the meter?

1. when the initial value of the loop control variable is known;

2. when the step of changing the loop control variable is known;

3. When the number of repetitions of the cycle is known before the cycle;

4. When the limits of change of a variable and a step of its change are known;

5. when it is known listed in paragraph 3 or in paragraph 4.

Question 5. What are the errors in the cycles?

1. This is an error caused by the mismatch of the constructions used in the program, the rules of the language;

2. This is an error caused by the fact that memory is not reserved for arrays or initial values were not given to variables used in the program;

3. This is an error caused by a loop, when the program can not exit the loop;

4. This is an error caused by incorrect use of labels or line numbers of the program;

5. There is no correct answer.