Page 35 - Viva ICSE Computer Studies 7 : E-book

Computer Etiquette

Always use a dust cover to cover your computer and its parts, securing it from dust and dirt.

Tech Terms

Octal number system: A system that consists of 8 digits
Least signifi cant digit: The rightmost digit of a number
Most signifi cant digit: The leftmost digit of a number

Quick Recall

• A number system consists of a set of values.

• Decimal number system is the most commonly used number system. It has a base of 10.
• The binary number system consists of two digits, i.e., 0 and 1, and has a base of 2.
• The octal number system consists of 8 digits and has a base of 8.
• The hexadecimal number consists of 16 digits and has a base of 16.

A. Name the following.
1. Rightmost digit of a number ______________

2. Leftmost digit of a number ______________
3. Digits of binary number system ______________ ______________
4. Two examples of hexadecimal number system ______________ ______________

5. Base of hexadecimal number system ______________

B. State whether the following statements are true or false.
1. The positional value of each digit increases from right to left. ______________
2. The base of binary number system is 8. ______________
3. Decimal number system has a base as 0. ______________

4. The instructions given to a computer is converted into decimal language. ______________
5. The base of octal number system is 8. ______________

C. Fill in the blanks.
1. To convert binary number system to decimal number system, we multiply each digit with its
______________________.

2. The _________________ system consists of 8 digits.

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