Adaface Sample IBM JCL Questions

Consider the following JCL snippet:

In MYJOB, PROG1 in STEP1 uses the dataset MY.DS.INPUT with a disposition of (OLD,DELETE,KEEP). PROG2 in STEP2 also uses the dataset MY.DS.INPUT with a disposition of (NEW,PASS,DELETE).
            
            Assume that STEP1 executed successfully, but STEP2 failed during its execution. What would be the status of the dataset MY.DS.INPUT after the job MYJOB is run?

A: MY.DS.INPUT will be deleted.
            B: MY.DS.INPUT will be kept and can be used by other jobs.
            C: MY.DS.INPUT will be newly created.
            D: MY.DS.INPUT will be available for the duration of the job, then deleted.
            E: MY.DS.INPUT status cannot be determined with the provided information.

Consider a JCL job that needs to execute five steps: STEP01, STEP02, STEP03, STEP04, and STEP05. The steps represent data initialization, data processing, data validation, error handling, and job finalization respectively.
            
            The execution rules are as follows:
            
            1. The job should always start with STEP01.
            2. STEP02 should only execute if STEP01 completes successfully with a return code (RC) of 0.
            3. STEP03 should always run after STEP02, irrespective of STEP02's return code.
            4. STEP04 should only execute if either STEP02 or STEP03 fails, i.e., return a code not equal to 0.
            5. STEP05 should always be the last step, and should only execute if all the previous steps were successful (each returning a code of 0).
            
            Given these rules, how would you design the JCL job using the IF/THEN/ELSE/ENDIF construct?