First impression is the best impression.Your dress code has got a very important role to play in your interview.
Dress Code for Women
1.Both western and traditional dresses  are allowed therefore choose whichever is comfortable for you.
2.For Indian formats choose plain cotton sarees,salwar Kameez with plain dupatta.Avoid low  cut neck lines prefer light shades.Avoid very colorful clothes.
3.If you choose western formats prefer plain light colored blouse with formal trouser or skirt of conservative length,up to the knee.Prefer dark shades for trouser.In winter blazer/conservative suit my be used.
4.Avoid too much makeup.
6.Use simple jewellery.
7.Use low heels to feel comfortable.
Dress Code for Men
1.Formal light colored shirt and tie.
2.Trousers plain in dark shade.
3.In winter wear blazer/suit conservative in Black/Navy color.
4.The tie should match the color of the shirt/suit.Avoid flashy colors.
5.Shirts should be tucked in.
5.Shoes should be well polished.
6.Neat and clean hair.
7.Avoid Jeans and T shirts.
Take care of the following common points:
Use cotton clothes.
Get your dress ready a day before the interview.
Nails ,teeth should be neat and clean.
Hair should not be too long.
Shoes polished.
Use a deodorant after bath.
Avoid sneakers,high heels noisy shoes.
Avoid chewing gums,ipod,coffee,soda,
And last but not the least do not forget to wear......................!
A smile on the  face !