Answer to Question #110468 in Computer Networks for Arbab Ali

Question

The question arises as to whether it is possible to develop a program that can analyze a piece of software to determine if it is a virus. Consider that we have a program D that is supposed to be able to do that. That is, for any program P, if we run D(P), the result returned is TRUE (P is a virus) or FALSE (P is not a virus). Now consider the following program:

Program CV :=
{. . .
main-program :=
{if D(CV) then goto next:
else infect-executable;
}
next:
}
In the preceding program, infect-executable is a module that scans memory for executable programs and replicates itself in those programs. Determine if D can correctly decide whether CV is a virus.

Answer 1

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