Question

Which virus infects only executable (.exe) files.
1. Alas
2.Alabama
3.Christmas
4.Adware​

Answer 1

Answer:

Jerusalem is a logic bomb DOS virus first detected at Hebrew University of Jerusalem, in October 1987. On infection, the Jerusalem virus becomes memory resident (using 2kb of memory), and then infects every executable file run, except for COMMAND.COM.

Answer 2

Answer:

Jerusalem is a logic bomb DOS virus first detected at Hebrew University of Jerusalem, in October 1987. On infection, the Jerusalem virus becomes memory resident (using 2kb of memory), and then infects every executable file run, except for COMMAND.COM.

Operating system(s) affected: DOS