Linux
What command is used to assign executable permission to all of the files named "report"?

chmod u + x report
None of the listed here
chmod ugo + rw report
chmod ugo + x report

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Linux
The physical layer of a network

All of these
controls error detection and correction
None of these
constructs packets of data and sends them across the network
defines the electrical characteristics of signals passed between the computer and communication devices

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