Role of a tester in sdlc is performing functional and 
system  testing

HI

Role of a Tester in SDLC is Performing

1. Functional Testing.

2. Regression Testing.

comment sun_ramprasad@yahoo.com
9940314706

hi kumar,
first, ur question is wrong?
second , as a tester u should not ask this question.
ok let me exoplain...
tester involves from the begining of bussiness document 
designed to till the application released.
between these phases, tester learns previous application, 
reviews BD documents,use cases, prepares test scenarios and 
test cses based on modules,involves executing of test cases 
and so on... prepares  documents like TSR,Deffered bugs, 
defects reports etc.

software development life cycle involves six different 
phases such as 
requirment,design,coding,testing,installation,maintainance.
So in this whole process testers are involved in each phase.
upto coding phase QA part is taken care by the testers and 
after that QC activities are taken care by the testers.

as a whole it s the role of a tester

hi,
SDLC- Software Development LiFe Cycle
it contains 6 Phases
1)Gathering Software Requirement
2)Software Design and Analysis
3)Coding
4)Testing
5)Implementation
6)Maintainance 
in every phase Software Tester is involved.
In First Phase SRS ( Software Requirement Specification
)document is Craeted and Validated.

In Second Phase Design / Algo are Analyze and design
document are craeted by design team which is tested by Tester.

In Third Phase Coding, which is done Software Developer are
checked taht all path are covered are not, coding should be
done in such a way that new changes are made easily, and
application should be user friendly.

in Fourth Phase Actual testing ( Unit , Integration,
System,UAT) is done.

In Fifth Phase Check that Application is working fine in
Different OS environment

In Sixth Phase Configuration management is done..

in this way Software Tester is involved from beginning of
Any Project.