Chapter :- 2 Number System

July 29, 2023 chinu

Chapter :- 2 Number System

Q.1 Tick the correct option

1.Computer recognize only two discrete states, i.e ___________.

(a) Yes and No

(b) Right and Wrong

(c) On and Off

2.The On and Off states are represented by _____________ .

(a) 0 and 1

(b) 1 and 2

3. The digit ‘zero’ represents the electronic state __________.

(a) On

(b) Off

4. The base of 8 number system is _________.

(a) Hexadecimal

(b) Binary

(c) Octal

5. The number system used internally by all modern computers is ___________.

(a) Hexadecimal

(b) Binary

6. The digits used in octal number system are from ____________.

(a) 0 to 9

(b) 0 and 1

(c) 0 to 7

Q.2 Write True and False.

1.Every character in a computer has an assigned numeric code, called its ASCII code. True
2.The decimal number system has just two unique digits, 0 and 1. False
3.A byte is used to represent a single character in the computer.False
4.A group of 8 bits is called kilobyte. False
5.A nibble is a collection of 5 bits.False

Q.3 Fill in the blanks.

1. In computers, characters have to be represented in the form of electronic pulses.

2. In a Positional Number System, there are only a few symbols called digits.

3. The binary Number System represents numeric values using two symbols, i.e., 0 and 1.

4. The Decimal Number System has 10 as its base.

5. The Octal Number System has 8 as its base.

6. The Hexadecimal Number System includes the symbols 0 to 9 and A to F.

Q.4 Define the following.

1.Bit :- The smallest unit in computer processing is called Bit. It is unit of data that can either 0 or 1.

2. Byte :- A group of 8 bits is called a Byte.

3. Nibble :- Half of a byte is called Nibble. A nibble is a collection of bits on a 4 bit boundary.

Q.5 Answer Briefly.

Q.1 What is the use of ASCII code? Write its full form.
Ans :- Every character in computer like alaphabet,number,symbols etc has an assigned numeric code. This code is known as ASCII(American standard for Information Technology).

Q.2 What do you mean by Number system? Mention its types.
Ans :- Number system is a way to represent number in a computer system. There are two types of number system
(1) Non-positional number
(2) Poitional number system

Q.3 Name different number systems used in Positional System.
Ans :- There are different positional number system
(1) Decimal System (3) Octal System
(2) Binary System (4) Hexadecimal System