Learn the correct command syntax to vary a device with device number 2750 online in the mainframe environment. Get a clear explanation of the ‘V’ command.
Table of Contents
Question
How do you vary a device with device number 2750 online?
A. v 2750,online
B. vary 2750,online
C. v online,2750
D. vary online,2750
Answer
A. v 2750,online
Explanation
To vary a device with device number 2750 online in the mainframe environment, you use the ‘V’ command followed by the device number and the ‘ONLINE’ keyword. The proper syntax is:
v 2750,online
The other options have incorrect syntax:
B. vary 2750,online – “VARY” is not a valid command, it should be “V”
C. v online,2750 – The device number should come before the keyword “ONLINE”
D. vary online,2750 – Both “VARY” and the order of parameters are incorrect
The ‘V’ command is used to dynamically change the status of devices like disk drives, terminals, printers etc. in the mainframe environment. Specifying the device number tells the operating system which hardware device to act upon, and the “ONLINE” keyword brings the device to an active and available state.
So in summary, “v 2750,online” is the correct and complete command to vary the device 2750 online, making it available for use by the mainframe operating system and applications.
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