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JCL Interview Questions & Answers
Job Control Language (JCL) is a scripting language used on IBM mainframe operating systems to instruct the system on how to run a batch job or start a subsystem. JCL (job control language) is a language for describing jobs (units of work) to the MVS, OS/390, and VSE operating systems, which run on IBM's S/390 large server (mainframe) computers. These operating systems allocate their time and space resources among the total number of jobs that have been started in the computer.

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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 execution.		View Answer
78) main() { int i=_l_abc(10); printf("%d ",--i); } int _l_abc(int i) { return(i++); }		View Answer
What does IEFBR14 utility is used for?		View Answer
11. main() { char string[]="Hello World"; display(string); } void display(char *string) { printf("%s",string); }		View Answer
4. main() { static int var = 5; printf("%d ",var--); if(var) main(); }		View Answer
9. main() { int i=3; switch(i) { default:printf("zero"); case 1: printf("one"); break; case 2:printf("two"); break; case 3: printf("three"); break; } }		View Answer
Write the DD step names used in IERCOMPR?		View Answer
52) main ( ) { static char s[ ] = {“black”, “white”, “yellow”, “violet”}; char ptr[ ] = {s+3, s+2, s+1, s}, p; p = ptr; ++p; printf(“%s”,--++p + 3); }		View Answer
81) main(int argc, char **argv) { printf("enter the character"); getchar(); sum(argv[1],argv[2]); } sum(num1,num2) int num1,num2; { return num1+num2; }		View Answer
I have multiple jobs ( JCLs with several JOB cards ) in a member. What happens if I submit it?		View Answer
58) main() { char name[10],s[12]; scanf(" "%[^"]"",s); } How scanf will execute?		View Answer
24. #define clrscr() 100 main() { clrscr(); printf("%d ",clrscr()); }		View Answer
79) main() { char p; int q; long *r; p=q=r=0; p++; q++; r++; printf("%p...%p...%p",p,q,r); }		View Answer
35) void main() { int i=5; printf("%d",i+++++i); }		View Answer
30) main() { int i=400,j=300; printf("%d..%d"); }		View Answer
69) main() { int j; { int i=10; j=&i; } printf("%d",j); }		View Answer
61) main() { char cptr,c; void vptr,v; c=10; v=0; cptr=&c; vptr=&v; printf("%c%v",c,v); }		View Answer
70) main() { int i=-1; -i; printf("i = %d, -i = %d ",i,-i); }		View Answer
What is primary allocation for a dataset?		View Answer
6. main() { extern int i; i=20; printf("%d",i); }		View Answer