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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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Question	Rating	View Answer
34) void main() { int i=5; printf("%d",i++ + ++i); }		View Answer
main() { main(); }		View Answer
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 restarts. could you please provide me the code		View Answer
How do you access a file that had a disposition of KEEP?		View Answer
Describe the DD statement, its meaning, syntax and keywords		View Answer
What do you do if you do not want to keep all the space allocated to a dataset?		View Answer
63) main() { char not; not=!2; printf("%d",not); }		View Answer
80) main() { char c=' ',x,convert(z); getc(c); if((c>='a') && (c<='z')) x=convert(c); printf("%c",x); } convert(z) { return z-32; }		View Answer
53) main() { int i, n; char x = “girl”; n = strlen(x); x = x[n]; for(i=0; i<n; ++i) { printf(“%s ”,x); x++; } }		View Answer
44) main() { printf("%d", out); } int out=100;		View Answer
How do you overcome this limitation ?		View Answer
25. main() { printf("%p",main); }		View Answer
76) struct aaa{ struct aaa prev; int i; struct aaa next; }; main() { struct aaa abc,def,ghi,jkl; int x=100; abc.i=0;abc.prev=&jkl; abc.next=&def; def.i=1;def.prev=&abc;def.next=&ghi; ghi.i=2;ghi.prev=&def; ghi.next=&jkl; jkl.i=3;jkl.prev=&ghi;jkl.next=&abc; x=abc.next->next->prev->next->i; printf("%d",x); }		View Answer
17. #include<stdio.h> main() { struct xx { int x=3; char name[]="hello"; }; struct xx *s; printf("%d",s->x); printf("%s",s->name); }		View Answer
How can I get the number of records of a sequential file without browsing it?		View Answer
What is the meaning of keyword in JCL? What is its opposite?		View Answer
96) void main() { static int i=5; if(--i){ main(); printf("%d ",i); } }		View Answer
7. main() { int i=-1,j=-1,k=0,l=2,m; m=i++&&j++&&k++\|\|l++; printf("%d %d %d %d %d",i,j,k,l,m); }		View Answer
What is the DD statement for a output file?		View Answer
46) main() { show(); } void show() { printf("I'm the greatest"); }		View Answer