Multiple choice technology mainframe

What allocates datasets for all the steps before the job is scheduled & What allocates datasets required by a step just before the step executes?

  1. JES 2 & JES 2

  2. JES 2 & JES 3

  3. JES 3 & JES 2

  4. JES 3 & JES 3

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

JES3 allocates datasets for all job steps before job scheduling (global allocation), while JES2 allocates datasets dynamically just before each step executes (step-level allocation). This is a fundamental architectural difference.