Operating System (OS)
If you do not know which version of MS-DOS you are working with, which command will you use after having booted your operating system?

DISK command
FORMAT command
DIR command
None of these
VER command

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Operating System (OS)
Trojan-Horse programs

None of these
do not usually work
are hidden programs that do not show up on the system
are legitimate programs that allow unauthorized access
usually are immediately discovered

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Operating System (OS)
Under virtual storage,

None of these
only the active pages of a program are stored in primary storage
a single program is processed by two or more CPUs
interprogram interference may occur
two or more programs are stored concurrently in primary storage

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Operating System (OS)
Indicate which, of the following, in not true about an interpreter

Interpreter analyses each source statement every time it is to be executed
Interpreter is a kind of translator
None of these
All of these
Interpreter generates an object program from the source program

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