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IBM C9050-042 Exam Syllabus Topics:

IBM Developing with IBM Enterprise PL/I Sample Questions:

1. A module which is serially reusable has which of the following characteristics?

A) Is intended for single use only and must be refreshed from disk before it can be invoked again
B) Must contain the necessary logic to reset control variables and data areas at entry or exit and a second
task may not enter the module until the first task has finished
C) All or part of it may be replaced at any time by the operating system
D) Is designed for concurrent execution by multiple tasks

2. Prerequisite:
A sorted input dataset with record length 100 contains at least one record for all the values '1', '2', '3' in
the first byte. The applied sort criteria is 1,100,ch,a.
Requirements:
1 .) All records with '1' in the first byte must be ignored.
2 .) All records with '2' in the first byte must be written to the output dataset.
3 .) If there is a '3' in the first byte, the program must not read more records.
4 .) The program must not abend or loop infinitely.
If the following code does not fulfill the requirements above, which would be the reason, if any?
DCL DDIN FILE RECORD INPUT;
DCL DDOUT FILE RECORD OUTPUT;
DCL 1 INSTRUC,
3 A CHAR(1),
3 * CHAR(99);
DCL EOF_IN BIT(1) INIT('0'B);
DCL (Z1,Z2,Z3,ZO) BIN FIXED(31) INIT(0);
ON ENDFILE(DDIN) EOF IN = '1'B;
READ FILE(DDIN) INTO (INSTRUC);
IF EOF_IN THEN LEAVE;
SELECT(INSTRUC .A);
WHEN('1') DO;
Z1 += Z1;
ITERATE LAB;
END;
WHEN('3') DO;
Z3 = Z3 + 1;
LEAVE;
END;
WHEN('2') DO;
Z2 = Z2 + 1;
WRITE FILE(DDOUT) FROM(INSTRUC);
END;
OTHER DO;
ZO = ZO + 1;
PUT SKIP LIST(INSTRUC.A);
END; END;/*SELECT*/
END;/*LOOP*/

A) The code fulfills the requirement.
B) The code does not fulfill the requirement, because not all records with '2' in the first byte will be written
to the output dataset.
C) The code does not fulfill the requirement, because the READ iteration will not be left when the first
record with '3' in the first byte appears.
D) The code does not fulfill the requirement, because the program will loop infinitely.

3. Which of the following steps is NOT required to use the IBM Debug Tool on a PL/I program?

A) Compile with TEST option
B) Plan points where the program should stop during testing
C) Write an Language Environment user condition handler
D) Have the source code available

4. What is the output of the following program?
DCL A AREA(8000);
DCL 1 STR1 BASED(P),
2 STR1_LGTH BIN FIXED(31),
2 STR_CHAR CHAR(ALLOC_LGTH REFER(STR1_LGTH));
DCL ALLOC_LGTH BINFIXED(31);
DCL I FIXED BIN(31);
DCL P PTR;
ALLOC_LGTH = 100;
DO I = 1 TO 10;
ALLOC STR1 IN(A);
END;
PUT SKIP LIST(CSTG(A));

A) 1016
B) 8000
C) 1056
D) 1040

5. What happens to STATIC variables declared in a procedure when the procedure is called recursively?

A) The values of STATIC variables from the previous invocation are saved and are available when the
current invocation ends.
B) The values of STATIC variables from the previous invocation are lost.
C) STATIC variables are allocated and initialized at each new invocation.
D) STATIC variables are allocated only once and can, therefore, be used for communication between
invocations.

Solutions: