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Disk Operating System (DOS) Interview Question:

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In which year the first operating system was developed?

a. 1910
b. 1940
c. 1950
d. 1980

Submitted by: Administrator

c. 1950
Submitted by:

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Top Disk Operating System (DOS) Questions

☺	The maximum length in DOS commands is: a. 80 chars b. 127 chars c. 100 chars d. 8 chars

☺	While working with MS-DOS which key is used to get the p[revious command used: a. F3 b. F1 c. F6 d. F9

☺	Copy and Xcopy are same in the sense: a. Both are internal command of DOS b. Both are external commands of DOS c. Both can be used to copy file or group of files d. Both a and b

☺	In MS-DOS you can use small or capital letter of combination of both to enter a command but internally MS-DOS work with. a. Small letter b. Capital letter c. Both a and b d. None of above

☺	Which is valid extension that user creates on operating system? a. Exe b. Com c. Sys d. Bat

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