Do they give 221g based upon the performance in Visa interview?

Hello Everyone,

Do they give the 221g white slip based upon how we perform in the interview?If anyone knows please reply me ? What are the reasons for the denial of visa ?

Federal objection notices such as 221g and even a 214b INA are never issued based on interview performance. The consulate officer reviewing your case already has all the facts needed for a decision, questions asked to you are simply a formality. 221g (which is better than a 214b INA) is simply a deficiency in documents such as a missing conference letter for a B1, a missing or incorrect I-20 for an F-1, a missing IAP-66 for a J-1 or a missing Statement of Work for an H-1B