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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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68) int i=10; main() { extern int i; { int i=20; { const volatile unsigned i=30; printf("%d",i); } printf("%d",i); } printf("%d",i); }		View Answer
28) enum colors {BLACK,BLUE,GREEN} main() { printf("%d..%d..%d",BLACK,BLUE,GREEN); return(1); }		View Answer
How to Execute from the second step in the PROC that is used in the JCL?		View Answer
What is DISP=(NEW,PASS,DELETE)?		View Answer
What is the purpose of the PARM keyword in the EXEC statement?		View Answer
14. main() { int i=10; i=!i>14; Printf ("i=%d",i); }		View Answer
How to invoke a jcl(with all control cards, like job crad and all) from another jcl		View Answer
What is 'S0C7' abend?		View Answer
A PROC has five steps. Step 3 has a condition code. How can you override/nullify this condition code?		View Answer
Can you code instream data in a PROC ?		View Answer
92) What are the following notations of defining functions known as? i. int abc(int a,float b) { /* some code / } ii. int abc(a,b) int a; float b; { / some code*/ }		View Answer
91) In the following pgm add a stmt in the function fun such that the address of 'a' gets stored in 'j'. main(){ int * j; void fun(int ); fun(&j); } void fun(int k) { int a =0; /* add a stmt here*/ }		View Answer
What are the valid DSORG values ?		View Answer
2. main() { char s[ ]="man"; int i; for(i=0;s[ i ];i++) printf(" %c%c%c%c",s[ i ],(s+i),(i+s),i[s]); }		View Answer
66) main() { int y; scanf("%d",&y); // input given is 2000 if( (y%4==0 && y%100 != 0) \|\| y%100 == 0 ) printf("%d is a leap year"); else printf("%d is not a leap year"); }		View Answer
What are the differences between JES2 & JES3 ?		View Answer
16. #include<stdio.h> main() { int a[2][2][2] = { {10,2,3,4}, {5,6,7,8} }; int p,q; p=&a[2][2][2]; q=*a; printf("%d----%d",p,*q); }		View Answer
3. main() { float me = 1.1; double you = 1.1; if(me==you) printf("I love U"); else printf("I hate U"); }		View Answer
The disp in the JCL is MOD and the program opens the file in OUTPUT mode. What happens ?		View Answer
74) main() { int i=5,j=6,z; printf("%d",i+++j); }		View Answer