Answer / udaykumar

Some more to previous answer........

All the client server applications are 2 tier
architecutures.
Here in these architecutre, all the "Business Logic" is
stored in clients and "Data" is stored in Servers. So if
user request anything, business logic will b performed at
client, and the data is retrived from Server(DB Server).

Here the problem is, if any business logic changes, then we
need to change the logic at each any every client.

The best ex: is take a super market, i have braches in the
city. At each branch i have clients, so business logic is
stored in clients, but the actual data is store in servers.
If assume i want to give som discount on som items, so i
need to change the business logic. For this i need to goto
each branch and need to change the business logic at each
client. This the disadvantage of Client/Server
architecture.

So 3-tier architecture came into picture:

Here Business Logic is stored in one Server, and all the
clients are dumb terminals. If user requests anything the
request first sent to server, the server will bring the
data from DB Sever and send it to clients. This is the flow
for 3-tier architecture.

Assume for the above. Ex. if i want to give som discout,
all my business logic is there in Server. So i need to
change at one place, not at each client. This is the main
advantage of 3-tier architecture.

Answer / mavan

Very useful example. thanks to Uday..

Answer / jamesh

In twoTier Application there are two cycle,interaction
between client-server& interaction between server-user
In threetier Applcation seperate cycle (Client-server-user)

Answer / sunitha.yagnamurthy.heartcom i

two tier architecture means in this layer database is
seperated to the buisiness lozic and user interface
data is sharaed for multi users
three tier architecture:
three tier architecture means it is indudviduly seperated
to the bl+Ul+database...
It is not affect to the another layer

Answer / hemakumar

Client server is a 2-tier application. In this, front end
or client is connected to
'Data base server' through 'Data Source Name',front end is
the monitoring level.


Web based architecture is a 3-tier application. In this,
browser is connected to webserver through
TCP/IP and webserver is connected to Data base
server,browser is the monitoring level.
In general, Black box testers are concentrating on
monitoring level of any type of application.

What is Test Data?. When we prepare test data?, is it included in Test Cases or should it be seperately prepared. What and when will be the actual use of Test Data and who prepares it.

1 Answers  

What is the test strategy for installation testing?

2 Answers   AppLabs,

How can u know IP Address of a computer?

2 Answers   HCL,

As i know Tester must hv to submit the test cases, test report, bug report,test results to his/her manager. So i question is What we write in test report and what else document we hv to submit to the Pm/TL.

2 Answers  

what is mean by defect resolution and its use??

1 Answers   SoftTech,

Explain thread testing.

0 Answers  

7. Would you return to this Web site on your own in the future? Why/why not?

0 Answers  

Who will perform Integration Testing?

17 Answers  

How does a coverage tool work?

0 Answers  

If Interviewer asks "Do you want to ask any question to us?" Which questions should we ask to them?

2 Answers   Hyundai, Patni,

what is entry and exit criteria?

3 Answers   ACS, GE,

Why UAT required

5 Answers   HCL, ITC Infotech,