I have attended quite a number of interview calls , I am listing those questions with answers.....
Q1)What is the DB2 version you are working on?
Ans: To know the Db2 version issue -DIS GROUP command from your SPUFI main panel command option.
Q2)What is the Z/OS version you are working on?
Ans: I don't know a command to know this , but you should be knowing your Z/os version ..the versions are like V1.8 ,v1.9, v1.10
Q3)How do you restart a job from a particular step in a proc?
Ans: add a paramater RESTART=procname.stepname in the job card and submit the job.
Q4)What are all versions you have worked on? Can you list some differences between the versions you have worked on?
Ans: Here you need to tell the versions and few advancements in latest versions.
I will keep on adding here..........