Trojan-Horse programs
Answer: A
Correct answer: are legitimate programs that allow unauthorized access
A Trojan horse works precisely because it appears to be a legitimate, useful program: the user installs and runs it willingly, and while it does whatever it advertises it also opens a way in for the attacker. Unlike a virus it does not replicate; its whole method is the disguise.
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Which command is used to send the contents of file named REPORT.TXT to the standard printing device?
Answer: B
Correct answer: TYPE REPORT.TXT > PRN
> redirects standard output, and PRN is the DOS device name for the standard printer, so TYPE REPORT.TXT > PRN sends the file’s contents there instead of to the screen. The pipe symbol feeds output into another program, and PRN is a device, not a program.
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Indicate which, of the following, in not true about an interpreter
Answer: A
Correct answer: Interpreter generates an object program from the source program
An interpreter produces no object program at all: it analyses and executes each statement as it reaches it, which is why a statement inside a loop is analysed afresh on every iteration. The other statements are true - it is a kind of translator, and it does re-analyse each statement every time.
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