1. Respond to all the questions. If you have no response for a question, put "none" or "nil" - do not draw a line or write "NA" or "not applicable".
2. You must provide specific contact and address information both in Bangladesh and the United States. Applications with responses such as "any hotel" as the address in the U.S. will be suspended for additional information.
3. You must sign your application, even if someone else fills it out.
4. All applicants are personally responsible and accountable for the answers on their application forms, regardless of who fills out the forms.
5. All phone numbers must be correct.
6. All four forms (DS-156, DS-157, DS-158 including the new questionnaire) must be filled out completely, even if the information is repeated from other forms.
7. If your name on your passport uses initials, you must list your FULL NAME in the "other names used" box.

1. Photo Size
a. 2 by 2 inches (roughly 50 mm square) with the head centered in the frame.
b. The head (measured from the top of the hair to the bottom of the chin) should measure between 1 inch to 1 3/8 inches (25 mm to 35 mm) with the eye level between 1 1/8 inch to 1 3/8 inches (28 mm and 35 mm) from the bottom of the photo.
2. Photo Appearance
a. The photograph must be a full-face view in which the visa applicant is facing the camera directly.
b. The applicant should not look down or to either side, and the face should cover about 50 percent of the photo area.
b. Side or angled views are NOT accepted.
c. The photograph must be in color, but must have only a white background. Photos with dark, busy, or patterned backgrounds will not be accepted.
d. In general, the applicant's head, including both face and hair, should be shown from the crown of the head to the tip of the chin on top and bottom and from hairline side-to-side. It is preferable that ears be exposed.
e. Head coverings and hats are only acceptable due to religious beliefs, and even then, may not cover any portion of the applicant's face.
f. Sunglasses or other wear which detracts from the face are not acceptable unless required for medical reasons (an eye patch, for example).
g. A photograph depicting a person wearing a traditional facemask or veil that does not permit adequate identification is not acceptable.
h. Photos of military, airline, or other personnel wearing hats are not acceptable. Photographs of applicants wearing tribal, national costume, or other headgear not specifically religious in nature are not acceptable.
3. Digital Photos
a. Digitally reproduced photographs must be reproduced without discernible pixels or dot patterns. Photocopied photographs are NOT accepted.

For detail information visit USA Embassy Dhaka page