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IBM C9050-042 Exam Syllabus Topics:

IBM Developing with IBM Enterprise PL/I Sample Questions:

1. A given PL/I program has a big nesting depth. Which of the following measures will help to reduce the
nesting depth in most cases?

A) Using DO-WHILE as the only loop technique
B) Avoiding ELSE clauses
C) Avoiding OTHER clauses
D) Using SELECT constructs instead of If-THEN-ELSE

2. A mainframe project is behind schedule and a project leader has only one copy of a PC-based PL/I
compiler available for distribution to team members who are all eager to use it. Optimally, to whom should
it be provided first?

A) The person who does the most PL/I development
B) The person who makes the greatest demand
C) The project leader and her manager
D) The person in the critical path

3. A compiler listing annotated with execution counts per statement helps identify all of the following
EXCEPT

A) Calls to library routines
B) Potentially miscoded conditions in IFs, WHEREs, WHILEs, and UNTILs
C) Unexecuted statements and procedures
D) Opportunities for code optimization

4. Which of the following is the most likely reason to use a debugger in a production environment?

A) Ensure data integrity
B) Enhance performance
C) Investigate error situations
D) Test a program

5. In the following example, what value will be written to SYSPRINT, if anything, by the PUT statement in
PGM_A?
PGM_A: PROC;
DCL INPARM CHAR (12) INIT('FIRST CALL? ');
DCL P_OUT PTR;
DCL OUTPARM CHAR (10) BASED (P_OUT);
DCL PGM_B ENTRY (CHAR(12),PTR) EXTEPNAL;
CALL PGM_B (INPARM,P_OUT);
IF OUTPARM = 'YES' THEN
DO;
INPARM = 'FOLLOW ON';
CALL PGM_B (INPARM,P_OUT);
END;
ELSE
DO;
INPARM = 'NORMAL CALL';
CALL PGM_B (INPARM,P_OUT);
END;
PUT SKIP LIST(OUTPARM);
END;
PGM_B: PROC(INPARM,P_OUT);
DCL INPARM CHAR (12);
DCL P_OUT PTR;
DCL OUTPARM CHAR (12) STATIC INIT(");
P_OUT = ADDR(OUTPARM);
IF INPARM = 'FIRST CALL? ' THEN
OUTPARM = 'YES'; ELSE
IF OUTPARM = " THEN
OUTPARM = 'FIRST CALL';
END;

A) blanks
B) The results are unpredictable.
C) 'YES'
D) 'FIRST CALL'

Solutions: