Informatics test 34 tasks

1. BASICS OF INFORMATICS

Task 1

Question 1. In what form does the PC (personal computer) receive information?
1.in the form of discrete signals (digital computer);
2. in the form of continuous signals (analog computer);
3. mainly in the form of discrete signals, and sometimes - in the form of continuous signals;
4. mainly 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. bit can be any value;
2. bit is an elementary unit of information, the bit value is the number 1;
3. 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 2;
5. 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, such units of measurement as Kilobyte, Megabyte, Gigabyte are used. What is a kilobyte?
1 Kilobyte = 1 bytes, or 1000 bytes;
2 Kilobyte = 1 bytes, or 1000000 bytes;
3 Kilobyte = 1 bytes, or 1000000000 bytes;
4 Kilobyte = 1 bytes, or 1024 bytes;
5 Kilobyte = 1 bytes, or 1048576 bytes.

Question 4. How do decimal, binary, octal and hexadecimal number systems differ from each other?
1. The bases of these number systems are, respectively, numbers 10, 2, 8, 16. When writing numbers in the decimal system, the numbers from 0 to 9 are used; in the 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, numbers can be written in 16 characters - numbers from 0 to 9 and Latin letters from A to F;
2. The bases of these number systems are, respectively, numbers 10, 2, 8, 16. When writing numbers in the decimal system, numbers from 0 to 10 are used; in the 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 hexadecimal system, numbers can be written in digits from 0 to 16.
3. The bases of these number systems are, respectively, numbers 10, 2, 8, 16. When writing numbers in the decimal system, numbers from 0 to 8 are used; in the 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 hexadecimal system, numbers can be written in digits from 0 to 16.
4. The bases of these number systems are, respectively, numbers 10, 2, 8, 16. When writing numbers in the decimal system, the numbers from 0 to 9 are used; in the 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, numbers can be written in digits from 0 to 17. In computing, only the decimal number system is used.
5. The bases of these number systems are, respectively, numbers 10, 2, 8, 16. When writing numbers in the decimal system, numbers from 0 to 9 are used; in the 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 hexadecimal system, numbers can be written in digits from 0 to 16.

Question 5. Decimal number 30 will be written in binary as:
1;
2;
3;
4;
5. 100001.

Task 2

Question 1. The elementary unit for measuring the amount of information is:
1. Byte;
2. KB;
3. MB;
4. Bit;
5. Eight bits.
Question 2. Given number systems: with base 2, 8, 10, 16. Record of the form 100
1. is absent in binary;
2. exists in all of the listed;
3. missing in decimal;
4. missing in octal;
5. is absent in the 16th.
Question 3. If the test variant has an average volume of 20 kilobytes (on each page of the test there are 40 lines of 64 characters each, 1 character takes 1 byte), then