Hello,

Yes, you can give the improvement exam to increase your 12th percentage.

If you improve your marks and meet the minimum eligibility criteria (usually 60% in 10th, 12th, and graduation), then you can apply for placements in companies like TCS and Wipro.

But remember, some companies may ask for original marksheets at the time of joining, so make sure you give the improvement exam as early as possible.

Hope it helps !