DATA REPRESENTATION

                                                   DATA  REPRESENTATION                                                          

Memory Units:

4 bit = 1 nibble

8 bit = 1 byte

1024 B = 1 KB (Kilo Byte)

1024 KB = 1 MB (Mega Byte)

1024 MB = 1 GB (Giga Byte)

1024 GB = 1 TB (Tera Byte)

1024 TB = 1 PB (Peta Byte)

1024 PB = 1 XB (Exa Byte)

1024 XB = 1 ZB (Zeta Byte)

1024 ZB = 1 YB (Yota Byte)

bit < Byte < KB < MB < GB < TB < PB < XB < ZB < YB

ü  bit (b)

ü  Byte (B)

Mbps – mega bits per sec.

MBps – mega Bytes per sec.

·        The information you put into the computer is called Data

·        Information of a computer is stored as Digital Data

·        A number system defines a set of values that is used to represent Quantity

·        In which number system, the modern computers are operated?

Binary Number System

·        Name the most significant bit, which represent 1 and 0 for a positive number and negative number, respectively.

Sign Bit

·        Which coding scheme represents data in a binary form in the computer system? ASCII, EBCDIC and Unicode are the most commonly used codes under this scheme.

Binary Coding Scheme

·        EBCDIC is a 8-Bit code with 256 different representations of characters. It is mainly used in mainframe computers.

·        EBCDIC stands for Extended Binary Coded Decimal Interchange Code

·        In the Hexadecimal Number System each number represents a power of 16. To represent the decimal numbers, this system uses numbers from 0 to 9 and characters from A to F to represent numbers 10-15, respectively. It is commonly used as a shortcut notation for groups of four binary digits

·        BCD is a method that represents the decimal digits with the help of binary digits. It takes advantage that one decimal numeral can be represented by 4-bit pattern. BCD stands for Binary Coded Decimal

·        This coding system is used to represent the interval storage area of the computers. In this system, every character is represented by a combination of bits. Binary Coding System

·        The Base or Radix of the decimal number system is 10

·        The arithmetic operations (addition, subtraction, multiplication and division) performed on the binary numbers is called Binary Arithmetic

·        What is the standard code the computer industry created to represent characters? American Standard Code for Information Interchange (ASCII)

·        ASCII is a code used for standardizing the storage and transfer of information amongst various computing devices.

·        It is required for representing more than 64 characters. At present, the mostly used coding systems are ASCII and EBCDIC

·        Which code is also known as Reflected Code? Gray Code

·        The 7-bit ASCII code is widely used for Two (0 or 1)

·        In the binary language, each letter of the alphabet, each number and each special character is made up of a unique combination of Eight Bits.