computer science

1	LAN	LOCAL AREA NETWORK
2	MAN	METROPOLITAN AREA NETWORK
3	WAN	WIDE AREA NETWORK
4	PAN	PERSONAL AREA NETWORK
5	WWW	WORLD WIDE WEB
6	HTTP	HYPER TEXT TRANSFER PROTOCOL
7	URL	UNIFROM RESOURCE LOCATOR
8	GSM	GLOBAL SERVICE FOR MOBILE COMMUNICATION
9	CDMA	CODE DIVISION MULTIPLE ACCESS
10	MODEM	MODULATOR DEMODULATOR
11	NIC	NETWROK INTERFACE CARD
12	PPP	POINT TO POINT PROTOCOL
13	SMTP	SIMPLE MAIL TRANSFER PROTOCOL
14	IMAP	INTERNET MAIL ACCESS PROTOCOL
15	VOIP	VOICE OVER INTERNET PROTOCOL
16	EDGE	ENHANCE DATA RATE FOR GLOBAL EVOLUTION
17	TCP	TRANSMISSION CONTROL PROTOCOL
18	IP	INTERNET PROTOCOL
18	SLIP	SERIAL LINE INTERNET PROTOCOL
19	FTP	FILE TRANSFER PROTOCOL
20	W3C	WORL WIDE WEB CONSORTIUM
21	ARPANET	ADVANCE RESEARCH PROJECT AGENCY NETWORK
22	NSF	NATIONAL SCIENCE FOUNDATION
23	POP	POST OFFICE PROTOCOL
24	NNTP	NETWORK NEWSS TRANSFER PROTOCOL
25	RJ 45	REGISTERED JACK
26	WLL	WIRELESS LOCAL LOOP
27	LCP	LINK CONTROL PROTOCOL
28	XML	EXTENSIBLE MARKUP LANGUAGE
29	HTML	HYPER TEXT TRANSFER PROTOCOL
30	DHTML	DYNAMIC HYPER TEXT MARKUP LANGUAGE
31	PHP	HYPER TEXT PROCESSOR
32	ASP	ACTIVE SERVER PAGE
33	JSP	JAVA SERVER PAGE
34	SMS	SHORT MESSAGE SERVICE
35	TDMA	TIME DIVISION MULTIPLE ACCESS
36	FLOSS	FREE OPEN AND LIBRE OPEN SOURCE SOFTWARE
37	GNU	GROUP NOT UNIX
38	FSF	FREE SOFTWARE FOUNDATION
39	OSI	OPEN SOURCE INTITAIVE
40	SIM	SUBSCRIBER INFORMATION MODULE
41	WIFI	WIRELESS FIDELITY
42	IRC	INTERNET RELAY CHAT
43	SMSC	SHORT MESSAGE SERVICE CENTRE
44	E-MAIL	ELECTRONIC MAIL
45	UMTS	Universal Mobile Telecommunications System (UMTS)
46	IPR	INTELLECTUAL PROPERTY RIGHT
47	Bps	BYTES PER SECOND
48	FDDI	FIBRE DISTRIBUTED DATA INTERFACE
49	UTP	UN SHIELDED TWISTED PAIR
50	STP	SHIELDED TWISTED PAIR
51	GPRS	GENERAL PACKET RADIO SERVICE
52	GPS	GLOBAAL POSTIONING SYSTEM
53	ICMP	INTERNET CONTROL MESSAGE PROTOCOL
54	NFS	NETWORK FILE SYSTEM

IInheritance in Object Oriented Programming can be described as a process of creating new classes from existing classes. New classes inherit some of the properties and behavior of the existing classes. An existing class that is "parent" of a new class is called a base class.

Types of Inheritance

1) Single level Inheritance

2) ) Multi level Inheritance

3) Multiple Inheritance

4) Hierarchical Inheritance

5) Hybrid Inheritance

Benefits of Inheritance

1) Reusability of code

2) Reduce the software cost and design time

3) Represents the real world situation

4) Easy maintenance and expansion of program

Syntax

1. Single level Inheritance

Class base

{

}

class derived: public base

{

}

2. Multi level Inheritance

class base

{

}

class derived1: public base

{

}

class derived2: public derived1

{

}

3. Multiple Inheritance

class base1

{

}

class base2

{

}

class derived : public base1,base2

{

}

4. Hierarchical Inheritance

class base

{

}

class derived1: public base

{

}

class derived2: public base

{

}

Single Inheritance

Multi level Inheritance

Multiple Inheritance

Hierarchical Inheritance

Hybrid Inheritance

Visibility Mode

Public mode: If a class is inherited in public mode there is no change in access control of base class.

i.e

public members remain public

protected members remain protected

private members remain private

Protected mode: If a class is inherited in protected mode public members will become protected and no change in access control of protected and private members of base class.

i.e

public members change to public

protected members remain protected

private members remain private

Private mode: If a class is inherited in private mode public and protected members will become private and no change in access control of private members of base class.

i.e

public members change to private

protected members change to private

private members remain private

Tips to solve board pattern questions

1. To calculate size of object

While we are calculating size of object we must know the size of different data types

Integer 2 bytes

Float 4 bytes

Long 4 bytes

Double 8 bytes

Short 2 bytes

Char 1 bytes ( for string name[10]= 10x1=10 bytes, city[20]=20x1=20 bytes}

While we are calculating size of object first we should calculate size of it’s own class then check if some class is inherited in it or not if yes then calculate the size of inherited class and add it on size of previously calculated size repeat this process this condition is true (please be careful while calculating the size , don’t do counting mistakes). While calculating size don’t bother about visibility mode.

Example

class A

{

}

class B:public A

{

}

class C:public B

{

}

If we have to find the size of object of class C

1) Go to class c calculate its size then (2) check if class is inherited or not here yes B is inherited, (3) calculate the size of B( 4 )again check if some class is inherited in class B or not here again it is true(5) so calculate size of A also (6) again check if some is inherited in class A or not, here it is false so stop the process . (7) add all three size it will be the size of object of class C
2. Members accessible from object
Always remember object can access only public members. while you are finding the members accessible from object first write down only PUBLIC member of its own class. then check if some class is inherited in it in PUBLIC Mode or not if it is then go to that class and then write the public members of this class, if some class is inherited in this class in public mode then go to that class also and write the public members.

3. Members accessible from MEMBER FUNCTION
Remember function can access every thing of it's own class so write every thing of class which belongs to it

now check some class is inherited or not
first level it will entry with public, protected and private gate and access public and protected member(as pvt member cant be inherited)

if some class is inherited in its base class then it will go through only public and protected gate and access only public member from this class. go through this diagram: