Which of the following operating systems are most used operating?
a) DOS
b) Windows
c) Macintosh
d) all of these
Explanation: DOS stand for Disk Operating System
Disk Operating System
Which of the following is the first operating system used for personal computers?
a) DOS
b) Windows
c) Macintosh
d) all of these
When did DOS
operating system was developed?
a) July 1960
b) July 1970
c) July 1980
d) July 1990
Which of the following organization developed disk operating system?
a) IBM
b) Microsoft
c) Android
d) Apple
How many bits
are in disk operating system?
a) 4-bit
b) 12-bit
c) 16-bit
d) 18-bit
