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

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

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Operating System (OS)
Semaphores

None of these
synchronize critical resources to prevent contention
synchronize critical resources to prevent deadlock
are used to do I/O
are used for memory management

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