If a CentOS 7 administrator needs to review the amount of time since the last system reboot and how many users are logged on, what command can they use?

A. time-boot
B. uptime
C. free
D. userlog


Answer: C

Computer Science & Information Technology

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An application's window status bar displays the name of the application.

Answer the following statement true (T) or false (F)

Computer Science & Information Technology

The ____ method returns the Boolean value True if the file exists; otherwise, it returns the Boolean value False.

A. IsThere B. CanFind C. DoesExist D. Exists

Computer Science & Information Technology

Consider the FireAlarm example as written using JGroups. Suppose this was generalized to support a variety of alarm types, such as fire, flood, intrusion and so on. What are the requirements of this application in terms of reliability and ordering?

What will be an ideal response?

Computer Science & Information Technology

When advising a customer on the purchase of a new power supply, you should explain that if the power supply runs at peak performance all the time, it will overheat. Additionally, power supplies can lose some capacity over time. Considering these conditions, you recommend that the customer purchase a power supply with a power rating higher than what the system currently uses.   How much more wattage over peak do you recommend the customer purchase? 

A. 15% more B. 20% more C. 30% more D. 40% more

Computer Science & Information Technology