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                    JESWhat is JES?Explain in detail about JES?What is the difference between JES2 and JES3? 
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                    JCL Spool CommandWhich spool command is used to release a job that has been submitted with HOLD option? 
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                    What is the purpose and meaning of the TIME keyword and what JCL statement is it associated with?TIME specifies the maximum CPU time allocated for a particular job or job step. If TIME is in the JOB card, it relates to the entire job; if in the EXEC statement, it relates to the job step. 

 
  
  
 