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IBM Developing with IBM Enterprise PL/I Sample Questions:

1. A PL/I program performance analwer can best help identify which of the following?

A) Adequate code coverage
B) Changes needed to database tables
C) CPU hotspots and elapsed time percentages by procedure
D) Incorrect program logic

2. Which of the following runtime options should be reviewed when attempting to improve performance in a
PL/I program?

A) TRACE, TRAP, CHECK and DEBUG
B) DEPTCONDLMT, INFOMSGFILTER, MSGFILE and RPTOPTS
C) ERRCOUNT, LIBSTACK, HEAPPOOLS and XPLINK
D) ALL31, STORAGE, HEAP and STACK

3. Given the following code, which condition would be raised first (if ENABLED)?
DCL A(50000) CHAR (8);
DCL I BIN FIXED (31);
DCL J BINFIXED (15);
DCI = 1 TO 100_000;
J = I;
A(J) = I;
END;

A) SUBSCRIPTRANGE
B) CONVERSION
C) FIXEDOVERFLOW
D) SIZE

4. What will be printed, if anything, to SYSPRINT after executing the following code?
DCL A FIXED CONTROLLED;
DCL P PTR;
DCL X FIXED BASED(P);
ALLOC A;
A = 1;
ALLOC A;
A = 2;
P = ADDR(A);
ALLOC A;
A = 3;
P = ADDR(A);
ALLOC A;
A = 4;
FREE A;
FREE A;
PUT DATA(X);

A) 3
B) 2
C) The results are undefined.
D) 4

5. A programmer has submitted the following declaration for review. What feedback should be provided to
the programmer?
DCL 1 A,
2 B DIM (1000) FIXED BIN (31) INIT (0),
2 C DIM (1000) FIXED BIN(15) INIT (0);

A) Discuss with the programmer how many elements of the arrays need to be initialized.
B) The code is good as written.
C) A is incorrectly initialized and the code must be changed.
D) The declaration of A should be changed because the current declaration contains padding bytes.

Solutions: