FCS - Week 3 Flashcards
What is meant by data representation in Computer ?
data representation means , how data is stored and processed by the computer
What is data ?
Collection of raw , unorganised facts .consists of numbers,text,
What is information ?
Processed data is called information
means when data is processed organizes & structured.
Types of Data ?
Numeric
Character string (Text)
Audio
Video
Image
What is the raw form of data ?
**Raw form of data is,
Unprocessed Data
Unorganised Data
Non-Structured Data
What is mean by Data Representation in Computer ?
Data Representation means , how data is Stored,Processed & Transmitted .
How data is represented in computer ?
Computer interprets data as bit patterns.
Data is represented in computers as a sequence of bits ,Binary Digits 0s & 1s
How numeric data is represented in computer ?
Numbers are encoded to their binary equivalent through number conversion methods, computer uses 3rd B conversion methods for representing integers and fractions.
How text data is represented by computer
Text Data is represented by means of a code,
ASCII,UNICODE
How Audio is represented in Computers ?
The amplitude of the sound wave is recorded at regular intervals through sampling, then sampled data is encoded to binary sequence.
How images are represented in computer ?
Images interpreted as collection of dots in rows & columns, these dots are is called pixels,each pixel is encoded & the ebtire image is represented as a collection iof these encoded pixels.
How videos are represented by computer ?
A video can be considered as a collection of images and can be encoded almost similar to image encoding.
How many types of numbers or numeric data we have
Signed numbers unsigned numbers
What is a number system ?
Number system is the method to represent numbers
Number system define how a number can be represented using distinct symbols or digits
What is the base of number system
Total number of distinct digits in the system ?
What is the maximum value of a single digit in a number system .
Maximum value of single digit in a number system is One Less than its base
How many types of Number Systems ?
Decimal
Binary
Octal
Hexadecimal
What is the base of decimal number system
Base of decimal number is 10
What is the base of binary number system
Base of binary number system is 2
What is the base of octal number system
Base of octal number system is 8
What is the base of hexadecimal number system
Base of hexadecimal number system is 16
What type of number system conversion we have ?
We have to convert decimal, octal, hexadecimal to its binary equivalent,In other words we have to perform Binary Arithmetic
What is the radix of number system ?
redix means base of a number system,
Redix determines how many different symbols are needed to represent a number
How many symbols are in decimal number system
Total 10
0,1,2,3,4,5,6,7,8,9
How many symbols are in binary number system ?
Total 2
0 and 1
How many symbols are in octal number system ?
Total 8
0,1,2,3,4,5,6,7
How many symbols are in hexadecimal number system ?
Total 16 - 0to9 & A to F
0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F
What is the Task of Data Representation Technique ?
Data Representation Technique is used top convert the data into its corresponding binary format
What methods are used to represent text data ?
Text data is represented by means of code discuss how thes,
These codes are of two types,
ASCII Codes
Unnicode
Which method is used to represent audio later
Audio sampling method is used to represent audio data in computers. The amplitude of the sound wave is recorded at regular intervals through sampling
Unsigned Data deals whith ,what type of data ?
Unsigned numbers deals with positive numbers
How Signed data is represented in computer ?
Three methods are used to deal with signed data ,
1. Sign Magnitude Method
2.One’s Complement Method
3.Two’s Complement Method
Whate is base 10 number system ?
Decimal Number Systerm is base 10 number System,
It is widely used number system all over the world
How many group bits are used in octal number system ?
Group of three bits are used in octal number system.
How many group bits are used in hexadecimal number system ?
Four bits group are used in hexadecimal number system
