Interview: Self Introduction, overflow of project, role, catlg proc instream proc difference, Gdg and syntax to create Gdg, parameters of Gdg, Restart parameter, condition parameters, Ibm utilities, to remove duplicates , inrec and outrec difference, divisions and sections in COBOL, working storage section use, rename, redefine, inspect, String and unstring, goback, continue, stoprun, static call and dynamic call, linkage section, arrays , update , insert , select, cursors, different types of vsam files, esds where the records are inserted, copy vsam files, path, aix, pass the values from JCL to COBOL : parm and accept, perform