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IBM C9050-042 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| File Processing and Database Connectivity | 20% | - Database connectivity and SQL integration - Sequential and VSAM file processing - Data manipulation and transaction control |
| PL/I Language Fundamentals | 25% | - I/O operations and file handling - Variables, constants, and expressions - Control structures - Syntax and data types - Procedures and functions |
| Performance and Optimization | 15% | - Compiler options and runtime tuning - Memory and storage efficiency - I/O and processing performance |
| Advanced PL/I Concepts | 25% | - Strings and arrays - Structures and records - Object-oriented features in PL/I - Error and exception handling - Pointers and dynamic memory allocation |
| Debugging, Testing and Maintenance | 15% | - Compilation and listing analysis - Debugging techniques and tools - Unit testing and code validation |
IBM Developing with IBM Enterprise PL/I Sample Questions:
Question 1
Given the following code:
DCL INDATA FILE RECORD INPUT;
DCL INSTRUC CHAR(100);
DCL EOF BIT(1) INIT('0'B);
ON ENDFILE(INDATA) EOF = '1'B;
OPEN FILE(INDATA);
READ FILE(INDATA) INTO(INSTRUC);
DO WHILE (^EOF);
CALL SR_PROCESS;
READ FILE(INDATA) INTO(INSTRUC);
END;
CLOSE FILE(INDATA);
If the database (input file) changes from OS-PS to DB2 view and the necessary syntax has been changed
accordingly, which of the following DB2-related steps is NOT additionally required to guarantee the same
level of stability and functionality?
A. Check the CURRENT SQLI
B. Set the EOF bit to '1'B, if SQLCODE = 100 (not found).
C. Check the SQLCODE after each EXEC SQL FETCH statement.
D. Check the SQLCODE after each EXEC SQL OPEN / CLOSE statement.
Question 2
Which of the following is NOT part of the PL/I code review?
A. Decision whether the review object is a appropriate solution
B. Training course for the program's author
C. Attendance of people with technical expertise
D. Documentation of results of the review
Question 3
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 fulfills the requirement.
C. The code does not fulfill the requirement because the program will loop infinitely.
D. 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.
Question 4
What does it mean that an interface is asynchronous?
A. Requests are always processed immediately.
B. Requests are processed in FIFOorder.
C. Requesting program does not have to wait for a reply.
D. Requests are processed in parallel.
Question 5
Which of the following is NOT a builtin subroutine which supports Logical Unit of Work?
A. PLIREST
B. PLICANC
C. PLILUW
D. PLICKPT
Solutions:
| Question 1 Answer: A | Question 2 Answer: B | Question 3 Answer: C | Question 4 Answer: C | Question 5 Answer: C |






