**1. Answer the following questions in one or two sentences each:**

(1)What is the decimal system?

Ans.
The place-value system with base 10 is called the decimal system.

(2)What is the binary system?

Ans.
The place-value system with base 2 is called the binary system.

(3)Write any two points of difference
between the decimal and binary number system.

Ans. The base of
decimal system is 10. There are 10 digits (0 to 9).The base of binary system is
2. There are 2 digits are available (0 to 1).

(4)What is the place value of each bit in
the binary notation?

Ans. In the
binary notation, the place-value of each successive bit to the left of the unit
position indicates a multiple of successive power of 2.

(5)What is a byte?

Ans. A group of 8 bit treated as a unit in
computer hardware is called byte.

(6)What is a word to microprocessor?

Ans. A word is a larger unit, long enough to
contain an instruction or an integer, It may be 2-byte, 4-byte or 8 byte.

(7)What is meant by ASCII code?

Ans. American National Standard Institute (ANSI)
develop a table of 7-bit binary code to represent a text. It was called
American Standard Code for Information Interchange.(ASCII).

**2. Name the following:**

(1)The
smallest unit of digital storage and information –

__Bit__.
(2)A
group of 8 bits treated as a unit –

__Byte__.
(3)A
group of 2,4, or 8 bytes treated as a unit –

__Word__.**3. State the following statements are true or false.**

(1)
The term bit coined from binary information technique. True

(2) In binary
number, the place-value of the bit to the left of the unit position is 10. False

(3)
The 8-bit byte can represent only 128 numbers. False

(4)
The abbreviation for bit is the lower case letter b. True

(5)
1 kilobyte = 8192 bits. True

(6)
Computer store text documents in RAM and on hard disk using ASCII codes. True.

(7)
The ASCII code was developed by American National Standard Institute. True

**4.Fill in the blanks:**

(1)

__Binary__have only possible values, 0 and 1.
(2)There
are

__8__bits in a byte.
(3)1
kilobyte of memory space can store

__8192__bits.
(4)1
gigabyte=

__1024__megabytes.
(5)Using only 7
bits initially, the number of printing and non- printing characters that ASCII
code could represent was

__128__numbers
(6)The
decimal value of the space character in the ASCII code is

__32__.
(7)In the ASCII
code, the decimal values of the capital letters of English alphabet rage from

__65 to 90__.
5.
Convert the following binary numbers to decimal:

(1)
(1001)2 : 9

(2)
(100000)2 : 32

(3)
(100001)2 : 33

(4)
(10001)2 : 17

6.
Convert the following decimal numbers to binary:

(1)
(87)10 :
110111

(2)
(127)10 : 1111111

(3)
(245)10 : 11110101

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