Submit selected steps in JCL without altering it

Submit selected steps in JCL without altering it Recently in an interview I was asked this question,  How to submit some selected steps in a JCL  My answer was to use COND parameter or Restart but then the  interviewer asked me that of alternate way, I could think of  The interview then challenged me of doing this without altering the JCL, I could not answer this. “; ; ; ;