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IBM Developing with IBM Enterprise PL/I Sample Questions:

1. Program A calls program B with PC as a parameter defined BIN FIXED (31 .0). Program B sets PC as
follows:
0 OK
4 WARNING
8 ERROR
Which of the following is the most appropriate statement for testing the PC variable?

A) SELECT (RC);
WHEN (0, 4);
OTHERWISE
PUT SKIP LIST('UNKNOWN VALUE FROM B');
END;
B) IF (RC >4) THEN PUT SKIP LIST('ERROR IN B');
ELSE PUT SKIP LIST('UNKNOWN VALUE FROM B');
C) IF (RC ^= 0) & (RC ^= 4) THEN PUT SKIP LIST('ERROR IN B');
ELSE IF RC> 8 THEN PUT SKIP LIST('UNKNOWN VALUE FROM B);
D) SELECT (RC); WHEN (0,4); WHEN (8) PUT SKIP LIST ('ERROR IN B');
OTHERWISE PUT SKIP LIST('UNKNOWN VALUE FROM B');
END;

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

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

4. Prerequisite:
A sorted input dataset with record length 100 contains at least one record for each of 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 read iteration must be left.
4 .) The program must not abend or loop infinitely.
If the code below does not fulfill the specifications provided above, which of the following is the most likely
reason?
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);
LOOP: DO WHILE (^EOF_IN);
SELECT(INSTRUC.A);
WHEN('1') DO;
Z1 +-= Z1;
ITERATE LOOP;
END;
WHEN('3') DO;
Z3 = Z3+1;
LEAVE LOOP;
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*/
READ FILE(DDIN) INTO(INSTRUC);
END ;/*loop*/

A) The code does not fulfill the requirement because not all records with '2' in the first byte will be written to the output dataset.
B) The code does not fulfill the requirement because the last record with '2' in the first byte will be written twice to the output dataset.
C) The code does not fulfill the requirement because the program will loop infinitely.
D) The code fulfills the requirement.

5. A program reads a GSAM dataset sequentially, reads complementary information from DB2-
Databases and uses this information to update an IMS-Database, At the end of the program statistics
about how many records have been read and how many IMS-Segments have been updated should be
printed. The program should write checkpoints regularly and should be restartable. Which of the following
groups of information saved when the checkpoint is written will provide enough information to be able to
restart the program correctly?

A) The key of the last record read from the GSAM dataset and the key of the last IMS segment changed.
B) The key of the last IMS segment changed and the number of segments changed.
C) The number of records read from the GSAM dataset and the number of IMS segmentschanged.
D) The number of records read from the GSAM dataset, the key of the last record read from the GSAM
dataset and the key of the last IMS segment updated.

Solutions: