Multiple choice technology mainframe

:DELete ALL .ZF .ZL will do the following

  1. Deletes all from first line to last line

  2. Delete all characters .ZF and .ZL

  3. Error occurs

  4. Does nothing
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A Correct answer
Explanation

The ISPF :DELETE ALL primary command with label range .ZF (first line) to .ZL (last line) deletes all lines in that range. .ZF and .ZL are built-in ISPF labels representing file boundaries. This effectively deletes the entire file contents, not the labels themselves.

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