What is a Generation Data Group (GDG)?

More DBA job interview questions and answers at http://dba.fyicenter.com/Interview-Questions/

What is a Generation Data Group (GDG)?

Generation Data Group is a group of chronologically or functionally related datasets. GDGs are processed periodically, ofen by adding a new generation, retaining previous generations, and sometimes discarding the oldest generation.

(Continued on next question...)

Other Job Interview Questions

• I have a COBOL program that Accepts some input data. How do you code the JCL statement for this (How do you code instream data in a JCL ?)
• What does the statements: typrun=scan and typrun = hold do in a JCL statement?
• What is the error code SOC01 indicate?
• How do you check the syntax of a JCL without running it ?
• What is the use of DSNDB07?
• What does a disposition of ( NEW, CATLG, DELETE) mean ?
• How do you overcome this limitation?
• What are SD37, SB37, SE37 abend ?
• Describe the EXEC statement, its meaning, syntax and keywords?
• How many extents are possible for a sequential file? For a VSAM file
• More...