Visitor Visa - B2

Dear All,
I prepare questions here link
 http://www.immihelp.com/experience/view-2-29-usavisitorvisa_b2visa.html#
with the help of Immihelp
Dress code according to job title business causal
8th Dec was our interview
Interview time 8am
After all security checks, we got token number.
1st fingerprint window
Guy; this is first time you are travelling to US?
Me; Yes
After fingerprint person kept our passports and told us to wait
Interview windows were 3rd 4th & 5th
3rd & 5th hold by lady VO
4th Window was male VO
Obviously, I was expecting for 3rd or 5th window
We wait till 09:40 then my name were called
However, our turn came on 4th Window
Hereby interview;
Me; Good morning
VO; Good morning
Passports were already with VO through fingerprint guy
VO; what is your purpose of travel sir?
Me; we would like to visit our son on Christmas & New Year Holiday
VO; Typing
VO; Where do you work?
Me; full name XYZ Company with abbreviate
VO; how long you are working with this company
Me; almost 5yrs
VO; for how long you want to stay in US?
Me; 2Weeks
VO; where you visit in last 5yrs?
Me; 5EU countries, UAE, Pak
VO; look into my passport pages
VO; what your son upto?
Me; he is working in xyz company
VO; Typing
VO; for how long he is there?
Me; hummm around 2years
VO; have you plan to visit other states?
Me; No
VO; how much is your salary?
Me; 00,000
VO; repeat salary figures wrongly (misunderstood)
Me; corrected
VO; Typing, typing & typing
VO; can I see sponsor letter?
Me; Handed over
VO; do you have any relatives in US?
Me; No
VO; how long you are living in KSA
Me; hummmm around 18yrs
VO; do you have any ralatives in KSA?
Me; brother in law & nephew
VO; Maam do you work
Wife; No I am house wife
VO; handed over green paper & said your visa is approved you will collect your passport within 3/4days
Me; Thank you & have a great day
VO; You Too
We left embassy at 1005am
Today received passports visa stamped
Conclusion;
Truth, presentation, you should dress according to your job title, sure eye contact but in my case I lost once, when VO ask how long your son is there? I replied with slight turn my face to my wife lost eye contact with VO then back to VO, answer all question in natural way instead of like robot.

Again thank you all, I got very useful information from you guys immihelp Regards,