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IBM C9050-042 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Debugging, Testing and Maintenance | 15% | - Compilation and listing analysis - Debugging techniques and tools - Unit testing and code validation |
| Advanced PL/I Concepts | 25% | - Structures and records - Error and exception handling - Object-oriented features in PL/I - Strings and arrays - Pointers and dynamic memory allocation |
| PL/I Language Fundamentals | 25% | - Variables, constants, and expressions - Procedures and functions - Syntax and data types - I/O operations and file handling - Control structures |
| Performance and Optimization | 15% | - I/O and processing performance - Compiler options and runtime tuning - Memory and storage efficiency |
| File Processing and Database Connectivity | 20% | - Sequential and VSAM file processing - Data manipulation and transaction control - Database connectivity and SQL integration |
IBM Developing with IBM Enterprise PL/I Sample Questions:
1. Given the following declaration, what is the most efficient way of setting C from A?
DCLA BIN FIXED(31) INIT(-123);
DCL C CHAR(6);
DCL P PlC '---- 9' DEFINED C;
A) PUT STRING(C) LIST(A);
B) P = A;
C) C = A;
D) PUT STRING(C) EDIT(A)(F(6));
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 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 fulfills the requirement.
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 characters may NOT be translated correctly when moving between code pages,
character sets and platforms?
A) +
B) |e
C) 9
D) A
4. 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) 'FIRST CALL'
B) 'YES'
C) The results are unpredictable.
D) blanks
5. An external subroutine procedure requires 10 variables belonging to an input file and 10 variables
belonging to an output file. What is best practice in passing these variables to the procedure?
A) Integrate the 20 variables in one structure and pass the address of the structure in the parameter list.
B) Declare the 20 variables EXTERNAL in both the calling program and in the procedure called and pass
no variable in the parameter list.
C) Pass the 20 variables individually in the parameter list.
D) Integrate the 10 variables belonging to the input file in one structure and the 10 variables belonging to
the output file in another one and pass the addresses of them as parameters to the procedure.
Solutions:
| Question # 1 Answer: B | Question # 2 Answer: C | Question # 3 Answer: B | Question # 4 Answer: B | Question # 5 Answer: D |
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