Grade 7 Computer Science Number System Notes

DELHI PUBLIC SCHOOL, BANGALORE SOUTH GRADE: 7 SUBJECT: COMPUTER CHAP 1: Number System Page no: 12,13 A. Fill in the blanks. 1. 2 2. Decimal 3. 8 4. 1 5. Binary 6. Hexadecimal B. Write T for T...

DELHI PUBLIC SCHOOL, BANGALORE SOUTH GRADE: 7 SUBJECT: COMPUTER CHAP 1: Number System Page no: 12,13 A. Fill in the blanks. 1. 2 2. Decimal 3. 8 4. 1 5. Binary 6. Hexadecimal B. Write T for True and F for False. 1. False 2. True 3. True 4. True 5. False 6. False C. Select the correct options. 1. C) Binary 2. A) 2 3. B) 10-15 4. B) 1 5. A) 2 D. Answer the following. 1. What is a number system? Name the different types of number systems. Ans: The number system is a set of values used to represent different quantities. Different types: Decimal, Binary, Octal and Hexadecimal number System. 2. What are the rules to convert a decimal number to binary number? Ans: 1) Divide the given decimal number with the base 2. 2) Write down the remainder and divide the quotient again by 2. 3) Repeat the step 2 till the quotient is zero. Remainder, that are obtained in each step are written in reverse order. 3. What is the base of the octal number system? Which digits are used in it? Ans: The concept of octal number system came from the native Americans. The octal number system consists of 8 digits: 0 to 7 with base 8. 4. What is the importance of binary number system? Ans: A computer understands only the binary codes. Therefore, the data that is entered into a computer is converted into its binary equivalent. It further converts the binary results into their decimal equivalents for the output.