Topic 2 : Data and Data Representation

시작하기. 무료입니다
또는 회원 가입 e메일 주소
Topic 2 : Data and Data Representation 저자: Mind Map: Topic 2 : Data and Data Representation

1. Processing

1.1. - Data encoding

1.2. - Data storage & Compression

1.3. - Data Integrity ( Quality of data )

2. Bits , Bytes and Words

2.1. Number Bases

2.1.1. Radix

2.1.1.1. - A single lower case letter appended to the end of each number to identify its type

2.1.2. Base

2.1.2.1. - Different symbols required to represent any given numbers

2.2. Binary System

2.2.1. - Early computers design was decimal

2.2.2. - ENIAC (computer)

2.2.3. - Stores both instruction & data as individual electronics

2.2.4. - Base number is 2

2.2.5. - Instruction and data computer stores sequentially

2.3. Octal System

2.3.1. - Base number is 8

2.3.2. - 8 digit numbers available (0,1,2,3,4,5,6,7)

2.4. Decimal System

2.4.1. - Base number is 10

2.4.2. - System based on decimal digits to represents numbers

2.4.3. - Each digit multiple by 10

2.5. Hexadecimal System

2.5.1. - Base 16 numbering system

2.5.2. - Not only to represent integers

2.5.3. - Represent sequence of binary digits

3. ASCII Codes , Unicode

3.1. The Alphaneumeric Representation

3.1.1. - Characters , number digits and punctuation known as alphaneumeric data .

3.1.2. - 3 Alphaneumeric codes common use in

3.1.2.1. * Unicode

3.1.2.2. * ASCII (American Standard Code for Information Interchange)

3.1.2.3. * EBCDIC (Extended Binary Coded Decimal Interchange Code)

3.2. ASCII

3.2.1. - Standard 7-bit code

3.2.2. - To provide a standard to code various symbols (visible / invisible symbols)

3.2.3. - Each binary value between 0 & 127 represents specific characters

3.2.4. - Assigning standard numeric values to letters , numbers , punctuation marks and control codes

3.3. Unicode

3.3.1. - Worldwide character-encoding standard

3.3.2. - Enable single unique character set that capable of supporting all characters from all scripts , symbols , commonly utilized for computing processing the globe .

3.3.3. - 16-bit standard

3.3.4. - Superset of ASCII

3.4. Usage of ASCII

3.4.1. - Encode text for creation of passwords

3.4.2. - Encode characters to display on all webpages

3.4.3. - Encode characters used in email settings

3.4.4. - Modify characters used in documents

3.5. EBCDIC

3.5.1. - Characters code from different from ASCII

3.5.2. - Developed by IBM

4. Data Formats

4.1. - Computers -> Process & store data in binary formats

4.2. - Human communication -> languages, sounds & images

5. Information processing cycles

5.1. - Input , process , output