You shouldn't have an Objective because most businesses do not care about you. They only care about what you can do for them, so use a Profile or Summary instead. The Strengths and Experience Summary cover some of the same territory.

You should use stronger words, especially adjectives and action verb. Your first Stength is "Involved in...". How is that a strength? You only talk about merely existing. "Excel in..." would be much better.

You should recast many of your duties as PARs and SARs, so it seems that you accomplich something beyond merely doing your job.

The resume is way too long and makes you seem like a job hopper. I would combine all of them under the title of something like Test Engineer Consultant, provide a summary of the tasks, throw in several PARs and SARs, possibly list types of duties not mentioned elsewhere and provide a simple list of project titles. Under this structure, duration is not important. the list would look like:
   College Management System for MNM Jain Engineering College, Chenna
   Vehicle Management System for Akshay Motors
    (Notice in both case I eliminated the unnecessary and redundant abbreviations)

The description could start like this: Performed manual testing in a variety of environments including Unix, VMS and Windows (I left off PC486 and DOS deliberately since they no longer have relevance) Then add one set of combined bullet points, like this (just more):
• Prepared & executed Test Cases
• Tested for the functionality of the application/modules
• Retested after enhancement.
• Performed Negative testing to find how the functions performs when it encounters invalid unexpected values
• Performed Regression testing.
• Tracked Defects
• Prepared Reports

You'll probably want to add more and continue to use action verbs in the beginning as in my examples.

I would then use several PARs and SARs to highlight some accomplishments in a way that also points out underlying skills. 

Eliminate these two lines:
• Looking after Uncle business until Feb 2006
• Home Based Data Entry Job from Jan'99 to April'2001.

Look at this posting for feedback on Sections.

I hope this helps.