Operating System (OS)
Which, of the following, is true for testing and debugging?

All of these
Testing and debugging indicate the same thing
Testing checks for logical errors in the programs, while debugging is a process of correcting those errors in the program
Testing detects the syntax errors in the program while debugging corrects those errors in the program
None of these

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Operating System (OS)
Trojan-Horse programs

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

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