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26. Control website access
Keyword Blocking
(Halangan /Tapisan Kata Kunci)
Can lead to criminalact such as exploitation
towords women/children.
Can lead sexual addiction
Can develop low moral values / immorality.Site blocking andweb rating system.
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27. NETWORKING
Type of Computer Networks
LAN, MAN, WAN
Type of Network Architecture
PEER TO PEER & CLIENT SERVER
Type of Network Topology
BUS , RING, STAR
Network Communications Technology
INTERNET, INTRANET, EXTRANET
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PRIMARY STORAGE
ROM (Random Access Memory) RAM (Read Only Memory)
Permanently stored inside the computer.
Non Volatile.
Main memory in a computer, can be read
and written. Volatile.
Programs in ROM have been pre
recorded. stored the data n programs by
manufacturer and cannot be changed.
Store data n programs can be accessed
directly by the processor.
Hold temporary instructions and data
needed to complete tasks.
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MEDIUM OF DELIVERY
WEB BASED
LIMITED IN GRAPHICS ,
VIDEO, SIZE AND
RESOLUTION. INFORMATION CAN BE
CHANGED, DAMAGED AND
DELETED.
INFORMATION CAN BEUPDATED EASILY.
CD BASED
CAN STORE HIGH QUALITY /
RESOLUTION GRAPHICS
AND VIDEO. INFORMATION PERMANENT
AND CANNOT BE CHANGED.
INFORMATION DIFFICULT
TO UPDATED OR CANNOTBE UPDATED.
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Structured Approachis a computer programming
techniquein which the program is divided
into moduleslike functionor subroutine.
GetInput (x, y)
z = Process (x, y)
DisplayResult (z)
SubGetInput (x as integer)
Input Number 1 ; xInput Number 2 ; y
End Sub
FunctionProcess (x as integer) as integer
Process = x + yEnd Function
SubDisplayResult (x as integer)
Print x;+;y;=;z
End Sub
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Object Oriented Approachis a computer programming
techniquesbased on the concept of an object thatcombine both dataand the functioninto a single unit.
Class aCircleConst PI = 3.142
Dim mRadius As Single
Function Diameter() As Single
Return 2 * mRadius
End Function
Function Area() As Single
Return PI * mRadius * mRadius
End Function
Function Circumference() As Single
Return 2 * PI * mRadius
End Function
End Class
Dim myCircle As New aCircle
myCircle.Radius = 10
Print myCircle.Area
Print myCircle.Diameter
Print myCircle.Circumference
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PROGRAMMING APPROCACH
STRUCTURED
USES A TOPDOWN
DESIGN MODEL
DIVIDES PROGRAMMING
PROBLEM INTO MODULE
LIKE FUNCTION.
SUITABLE FOR SMALL AND
MEDIUM PROJECT
OOP(OBJECT ORIENTED APPROACH)
USES OBJECT APPORACH.
PACKAGES THE DATA ANDFUNCTION INTO A SINGLE
UNIT.
SUITABLE FOR BIG PROJECT
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Primary key is a field thatcontains a value uniquely
identifies each record
in the table.
A foreign key is a field ina relational table that
matches the primary
key column of another table.
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Data types Explanation
Integer(Number)
Integer data type contains any wholenumbervalue that does not haveany frictional part.
Double
(Number)
Double data type contains anydecimal numbervalue that has a
fractional part.
String(Text)
String data type contains a sequenceof character.
Boolean(LogicalValue)
Boolean data type contains either atrueor falsevalue.
DateDate data type contains dateandtimevalue.
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Mathematical Operator
ComparisonOperator
Logical Operator
An operator is a symbol that causes VB to take an action
to perform mathematical
operations
to comparetwo value and
return value whether true or false
to perform logical operationsand
return value whether true or false
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MathematicalOperator
MeaningLogical
OperatorMeaning
+ Plus AndAnd
Operator
- Minus OrOr
Operator
* Multiply Not
Not
Operator
/ Divide
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ComparisonOperator
MeaningComparison
Operator
>
Greater
than>=
Greater
Than or
equal
< Less than
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TYPES OF OPERATORS
MATHEMATICAL OPERATOR
to perform mathematical
operations such as plus orsubtract.
LOGICAL OPERATOR
to perform logical
operationsand returnvalue whether true or false
such as checking the
condition of two Boolean
values , using AND, OR ,NOT .
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