27. 1991-yilda kim tomonidan erkin va ochiq kodli operatsion sistemalar o’ylab topilgan?
A) Linus Torvalds
B) Andy Rubin
C) Pol Allen
D) Bil Gates
28.Microsoft Word dasturidagi fayl kengaytmalarini ……… larga almashtirish mumkin.
rtt, txt, doc
dot,ccp
txt,dos
docx, rtfx
29.Microsoft Word dasturida yaratilgan fayl kengaytmasini aniqlang.?