Hi
I have completed my b.tech, recent online fillings there is a repeating question i.e. What are your career aspirations? Can you guide me what I have to mention

Thank you
Manish

This would be the part of your resume and thoughts that you might fill out that is concerned with career objectives.

Here is a generic sample:

My career aspirations are to find a stimulating and challenging position which builds on my university skills and knowledge, as well as professional experience. I am an ambitious individual who wants to learn and develop under the guidance of those who are at the top of their field and then use those skills to become an expert myself.

You might also find some helpful information on the following sites:

Should You Use a Career Objective on Your Resume?

Fundamentals of a Good Chronological Resume

LEO: Career Objectives in Resumes

Resumes

Resumes General - Career Quick Tips & Academic Resources - Career Center - Student Affairs

Excellent