Visitor Visa - B2

Thanks immihelp for flourishing with valuable information about B1/B2 visa interview, My elder brother’s VISA got approved today (19-8-2014) in Riyadh, Saudi Arabia, he just follow this website and read various case scenarios. He applied for B1/B2 visa as he wanted to attend an event related to his field in US.
 
Bro: Good morning Sir. ( I handed over the passport along with the employment letter and bank statement in a white plastic folder these documents were arranged by another officer who took finger scan)
VO: Good morning
 
VO: Do you want to visit this YYYY event? (While looking into the computer)
Bro: Yes
 
VO: Since, how long are you living in Saudi Arabia?
Bro: X years
 
VO: Are you working for full time with this company?
Bro: Yes
 
VO: How did u know about this event, who advised you?
Bro: last year one of my team member have attended YYYY event in Chicago and he said it was a remarkable experience it's a must visit.
 
VO: Who is sponsoring your visit?
Bro: Self sponsored (VO officer looked at bank statements and bank certificate)
 
VO: How is this event helpful to you?
Bro: Answered (exact to the point)
 
After this VO was continuously typing something for 15-20 seconds.
 
Then he said your visa is approved and you will receive the pp within 5 working days
 
I said thank you sir and left.
 
Tips:
1. Keep calm and relax, answer only what is asked.
2. Your confidence is the key factor and the decider of the interview outcome.
3. Just go with the flow and be natural.