Multiple choice technology mainframe

PC keyboards do not have a "PA1" key, 3270 emulators map some keys to "PA1". What is the "PA1" key used for in TSO and ISPF?

  1. Terminate the program currently running.

  2. Terminate ISPF to return to the TSO READY prompt.

  3. Pause a program so that data will not continue to scroll.

  4. Clear the screen to allow the next screen of data to display.
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A Correct answer
Explanation

PA1 interrupts the currently executing program or command, returning control to the system prompt. It doesn't exit ISPF itself - that's PA3 or the END command. PA2 is for attention requests, not program termination.

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