Interview questions

Mainframe interview questions

276 questions. Tap “Show answer” to check yourself.

  1. What could be the disposition parameter that i would have to use in the jcl if i have a file that has to be created newly for every successful run of the program ,but at the same time it should retain the old data if my program abend in the middle and res

  2. What is a GDG? How is it referenced? How is it defined? What is a MODELDSCB? GDG stands for generation data group. It is a dataset with versions that can be referenced absolutely or relatively. It is defined by an IDCAMS define generation datagroup execut

  3. How do you override a specific DDNAME/SYSIN in PROC from a JCL?

  4. What is S322 abend ?

  5. What does the TIME parameter signify ? What does TIME=1440 mean ?

  6. What is NOTCAT 2 ?

  7. What does IEBGENER do?

  8. A PROC has five steps. Step 3 has a condition code. How can you override/nullify this condition code?

  9. How do you check the syntax of a JCL without running it?

  10. What is a S0C4 error ?

  11. How do you send the output of a COBOL program to a member of a PDS?

  12. What is COND=EVEN ?

  14. How do you skip a particular step in a proc/JOB?

  15. What is 'S0C7' abend?

  16. What are SD37, SB37, SE37 abends?

  17. What are common DLI functions?

  18. Describe the DD statement, its meaning, syntax and keywords

  19. How do you calculate record size of an alternate cluster? Give your values for both unique and non-unique.

  20. Why we use export-import over repro?

  21. What is DISP=(NEW,PASS,DELETE)?

  22. How do you create a temporary dataset? Where will you use them?

  23. Describe the JOB statement, its meaning, syntax and significant keywords.

  24. Define the terms Parent & Child.

  25. During processing of a VSAM file, some system error occurs and it is subsequently unusable . What do you do ?

  27. What is the difference between specifying DISP=OLD and DISP=SHR for a dataset?

  28. Suppose a generation of GDG gets created in a particular step of a proc. How would you refer the current generation in a subsequent step? What would be the disposition of this generation now?

  29. What is a Root?

  30. What is the use of sysprint, sysin, sysout, dummy in jcl ?

  31. What is the difference between DISP=OLD,DISP=MOD & DISP=NEW

  32. The disp in the JCL is MOD and the program opens the file in OUTPUT mode. What happens ?

Companies that ask Mainframe questions

Bending Spoons Interview guide Spiralyze Interview guide Winman Software India Interview guide Namecheap Interview guide Softsquare Interview guide E-Con Systems Interview guide