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What is data modelling?
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Answered by: Pranav
- Nov 8th, 2005
Data Modelling is designing of the data content and structure of the database.
The data model documents the structure of and interrelationships between the data - it is presented as a combination of simple diagrams and written definitions and is independent of any DBMS software or hardware considerations.
sithusithu
- Jan 4th, 2006
Designing a normalized schema is known as data modeling
Designing a de-normalized schema is known as dimension modelingPranav
- Nov 8th, 2005
Data Modelling is designing of the data content and structure of the database. The data model documents the structure of and interrelationships between the data - it is presented as a combinatio...
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What is the difference between connecting to RDBMS using ODBC and native drivers?
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Answered by: David W.
- Mar 29th, 2006
ODBC is an open standard for software providers to follow when creating an intermidate layer between the database and the application using the database. Having "open standards" usually means that different applications can write their code the same way no matter which database they are using, as long as that database comes with an ODBC driver.In contrast, native drivers are built with one specific database in mind. Thus, applications written to use the native driver will only work with one particular database. You will lose flexibility in your code's ability to switch database vendors, but you might gain performance enhancements due to the fact that the driver is custom made for the database and may be able to take advantage of an "insider's view" of the database software.
David W.
- Mar 29th, 2006
ODBC is an open standard for software providers to follow when creating an intermidate layer between the database and the application using the database. Having "open standards" usually means that di...
Dhayanand darshanala
- Nov 4th, 2005
Rdbms is to connect to databasr through the oracle . Where as ODBC is to connect to microsft and where native is to conenct java with oracle. .
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What is the difference between collision domain and broad cast domain?
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Answered by: Rama
- Aug 24th, 2006
A collision domain is a logical area in a computer network where data packets can "collide" with one another, in particular in the Ethernet networking protocol. The more collisions in a network the less efficient it is.
A broadcast domain is a logical area in a computer network where any computer connected to the computer network can directly transmit to any other in the domain without having to go through a routing device.
Rama
- Aug 24th, 2006
A collision domain is a logical area in a computer network where data packets can "collide" with one another, in particular in the Ethernet networking protocol. The more collisions in a network the le...
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Stack pointer
Can anyone give me complete information while performing this situation,A function is running, it has its own stack pointer, memory area now it invokes another function from this point what changes will be in it's memory area and what other changes in data segment, stack segment, heap segment. I want a complete picture of memory architecture?
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kalayama- Member Since Sep-2006 | Dec 8th, 2006
There will be a lot of changes in fact. First of all, all the variables the function was suing needs to be pushed into the stack. (we need all these variables when we return from the other function). The Program counter will be pushed to stack too... (When the "return" of second function occurs we should know where to 'return' to)These are the basics which are bound to happen when a function calls another.
kalayama
- Dec 8th, 2006
There will be a lot of changes in fact. First of all, all the variables the function was suing needs to be pushed into the stack. (we need all these variables when we return from the other function). ...
prasanth
- Nov 27th, 2006
hi, There will be no change in memory area .And all the major part will be taken by the stack pointer.It depends on the calling conventions like pascals...
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What are the differences between Desktop and Enterprise Application?
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Answered by: Harshit Mistry
- Feb 1st, 2007
Hi,Desktop application runs on a single machine. It could be a part of network. But Application and database resides on same machine. And only one user can access it at a time.Enterprise application is generally a multi-tier application. Many a concurrent users can access data and application at a time.
Harshit Mistry
- Feb 1st, 2007
Hi,Desktop application runs on a single machine. It could be a part of network. But Application and database resides on same machine. And only one user can access it at a time.Enterprise application i...
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What is the OSI Model?
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Answered by: Gurvinder Singh
- Dec 28th, 2006
OSI is Open System Interface Model. It is a concept which is used to make data transfer in steps. There are 7 layers and each layer interact with its counterpart. earlier a product made by any abc co was able to communicate with the same company product. to communicate with different co's products it was created. as it's name shows "OPEN System Interface"
SachinK
- Feb 8th, 2007
I think its Open System Interconection Model
Gurvinder Singh
- Dec 28th, 2006
OSI is Open System Interface Model. It is a concept which is used to make data transfer in steps. There are 7 layers and each layer interact with its counterpart. earlier a product made by any abc co ...
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Give the complete difference between database, relational database and object database?
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Answered by: PKayanan
- May 14th, 2007
A database is an organized collection of information. It is structured so you can jump to the information by using a key, and find related infromation by navigating a path. A sequential (flat) file is not considered a database.
A relational database contains one-to-many relationships.
A networked database contains one-to-many and many-to-many relationships.
PKayanan
- May 14th, 2007
A database is an organized collection of information. It is structured so you can jump to the information by using a key, and find related infromation by navigating a path. A sequential (f...
srikanth
- Apr 14th, 2006
Collection of inter-related data is called as database.
A DATABASE WHICH SUPPORTS ALL TYPES OF RELATIONS(one-one,one-many,many-one,many-many)IS CALLED AS RELATIONAL DATABASE.
object database or object oriented database both r same.
object database=relational database+oops -
How do you implement "Queue" functionality by using "2 Stacks"
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saradalincoln- Member Since Jun-2007 | Jul 17th, 2007
hi,
1. Take 2 empty stacks.
2. Fill the 1st stack with some items (eg: input 100, 101, 102, 103)
3. Now read the items from 1st stack in LIFO order and write to 2nd stack.
(By this the 2nd stack will get the items in the order .. 103, 102, 101, 100)
4. Now read the items from 2nd stack in LIFO order i.e. the output will be
100, 101, 102, 103.
(this is the queue order FIFO with respect to the actual items entered in 1st
stack.)
Thanks,
Sarada.saradalincoln
- Jul 17th, 2007
hi,1. Take 2 empty stacks.2. Fill the 1st stack with some items (eg: input 100, 101, 102, 103)3. Now read the items from 1st stack in LIFO order and write to 2nd stack. (By this the...
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What is the difference between Client response time and Server response time
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amitverma- Member Since Nov-2007 | Nov 14th, 2007
The major difference between the response time between a client & server is of - response time.
Usually client response time is lesser in comparison to the server response time.amitverma
- Nov 14th, 2007
The major difference between the response time between a client & server is of - response time.Usually client response time is lesser in comparison to the server response time.
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What is the main difference between portability and Platform independent ?
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Lecks- Member Since Feb-2010 | Feb 22nd, 2010
I agree it is correct to say that Java is platform independent, but it is due to the Java Virtual Machine. Java programs are only intermediately compiled, which allows adaptation to the given environment it needs to run in later.
An example of a portability issue is the creation of Unix. The first version was not portable. It was specific only to that computer's architecture. Unix became portable when it was rewritten in C. The new version written in C was portable because C served as a "translator", if you will, between what underlying architecture or devices were physically in the computer and what unix wanted them to do.Lecks
- Feb 22nd, 2010
I agree it is correct to say that Java is platform independent, but it is due to the Java Virtual Machine. Java programs are only intermediately compiled, which allows adaptation to the give...
akki21
- Feb 21st, 2007
"portability" refers to the ability of a system to support a particular software.it depends on the system configurations."platform independent"JAVA is a platform independent software. it need not be installed for the processing of its program
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Static Storage Class
Give one real time application where static variables are used.
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clickankit4u- Member Since Feb-2009 | Aug 3rd, 2011
Thinks of a situation where you need to do some work just once in a function irrespective of how many times that function is invoked then u can have a static variable which will keep a track of it. eg int main () { static int once = 0; if (!once) { once++; /*code need to be executed once*/ } /*reset of the code*/ }
clickankit4u
- Aug 3rd, 2011
Thinks of a situation where you need to do some work just once in a function irrespective of how many times that function is invoked then u can have a static variable which will keep a track of it. eg...
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Race Around Condition
What is race around condition?
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Sandhya.Kishan- Member Since Mar-2012 | Apr 17th, 2012
A race around condition is a fault in the process or a system where the output or the result of the process is critically and unexpectedly dependent on the timing of other events. Race condition especially occurs in multithreaded or in distributed systems.
Sandhya.Kishan
- Apr 17th, 2012
A race around condition is a fault in the process or a system where the output or the result of the process is critically and unexpectedly dependent on the timing of other events.
Race condition especially occurs in multithreaded or in distributed systems. -
Why contructors does not supports visual functions?
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Sandhya.Kishan- Member Since Mar-2012 | Apr 17th, 2012
Constructor does not support virtual functions because we need an object to invoke a virtual method in the first place and more over constructors are used to initializing objects,which is a static type.Virtual functions are invoked on the dynamic type of the object,hence the object may not be properly initialized when a constructor call is made.Since the derived part of the object would not be initialized during the execution of base class constructor,hence calling any virtual method from base class constructor does not work well.
Sandhya.Kishan
- Apr 17th, 2012
Constructor does not support virtual functions because we need an object to invoke a virtual method in the first place and more over constructors are used to initializing objects,which is a static typ...
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Two-Dimensional Arrays
A Two-dimensional array X (7,9) is stored linearly column-wise in a computer's memory. Each element requires 8 bytes for storage of the value. If the first byte address of X (1,1) is 3000, what would be the last byte address of X (2,3)?
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Sandhya.Kishan- Member Since Mar-2012 | Apr 17th, 2012
use the formulae X(i,j)=Base+w[n(i-1)+(j-1)] where m=7 ,n =9 ,i=2 ,j=3 hence 3000+8*[9(2-1)+(3-1)] =3000+8*(9+2) =3000+8*11=3088
Sandhya.Kishan
- Apr 17th, 2012
Use the formulae
X(i,j)=Base+w[n(i-1)+(j-1)]
where m=7 ,n =9 ,i=2 ,j=3
hence 3000+8*[9(2-1)+(3-1)]
=3000+8*(9+2)
=3000+8*11=3088 -
Stacks Task
What kind of useful task does stacks support?
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Sandhya.Kishan- Member Since Mar-2012 | Apr 17th, 2012
Stack supports four major computing areas,they are 1.expression evaluation 2.subroutine return address storage 3.dynamically allocated local variable storage and 4.subroutine parameter passing.
Sandhya.Kishan
- Apr 17th, 2012
Stack supports four major computing areas,they are
1.expression evaluation
2.subroutine return address storage
3.dynamically allocated local variable storage and
4.subroutine parameter passing. -
What are Application Clusters in CRM?
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Sandhya.Kishan- Member Since Mar-2012 | Apr 17th, 2012
CRM application cluster is a software that ranges in size and complexity making it possible for an organization to select the type of software needed the most. It consists of how a customer is related to sales,marketing and fulfillment,customer service and support,retention and loyalty program and contact and account management.
Sandhya.Kishan
- Apr 17th, 2012
CRM application cluster is a software that ranges in size and complexity making it possible for an organization to select the type of software needed the most. It consists of how a customer is relate...
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Define Raster and Vector Data.
Define raster and vector data. Explain what is the difference between raster and vector data?
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Sandhya.Kishan- Member Since Mar-2012 | Jul 4th, 2012
Raster data is a set of horizontal lines composed of individual pixels, used to form an image on a CRT or other screen.Raster data makes use of matrix of square areas to define where features are located. These squares are typically of uniform size, and their size determines the detail that can be maintained in the dataset.Raster data represent square areas, they describe interiors rather than boundaries. Vector data use X and Y coordinates to define the locations of points, lines, and areas (polygons) that correspond to map features, vector data tend to define centers and edges of features.They are excellent for capturing and storing spatial details
Sandhya.Kishan
- Jul 4th, 2012
Raster data is a set of horizontal lines composed of individual pixels, used to form an image on a CRT or other screen.Raster data makes use of matrix of square areas to define where features are loca...
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What is the Diff between Review and Walkthough?
1.What is the Dif between Review and Walkthrough?
On Testing Perspective ,who will do review and walkthrough?Clarify with an real example?
2.What is meant by inspection and who will lead the inspection and roles involved in Inspection?
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BA_Apprentise- Member Since Apr-2013 | Apr 19th, 2013
In laymans term walk-through is nothing but running thru the requirements while review is making an analysis of the progress and if the case may be a change has to be recommended
anji
- Apr 25th, 2013
Review if more formal than walkthrough .Walkthrough is done with a purpose of gain understanding of system and learning.
BA_Apprentise
- Apr 19th, 2013
In laymans term walk-through is nothing but running thru the requirements while review is making an analysis of the progress and if the case may be a change has to be recommended
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Can we execute any simple program without installing any Operating system?
I think no,can u suggest?
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Answered by: kunal kaushal
- Jul 24th, 2006
No! we can not run any simple program with out using any interface such as operatin systen or System software. but in some cases like Machine level languge or firmware run without any software because it directlly communicate with hardware and makes the hardware active so other program can run using his platform.
Siba Ranjan Biswal
- Feb 11th, 2014
Yes a program can be executed with out operating system..for example the boot executable program runs in systems while no operating system is available prior to it.
kaaka
- Feb 9th, 2008
Havent u guys heard of Assembly Language??? A microprocessor kit?? They dont have OS... But still we execute programs......
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What is actually meant for BUFFER? how does it work
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Answered by: Ankur
- Jul 14th, 2007
Buffer is something that is used to hold the data temporarly.
Ex-
If we are watching any thing online,then buffering of data takes place i.e for sometime data get stored in buffer then processed.sathiyapriya
- Feb 8th, 2015
It is like a storage area
Avinash kumar
- Jan 23rd, 2015
A buffer is a memory space that is used to hold different data items temporarily. its used for communication of different processes.I.e. Interprocess communication. The most relevant example is , play...
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