IBM : C9050-042 Questions & Answers
Updated: Sep 20, 2026
No. of Questions: 140 Questions & Answers with Testing Engine
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IBM C9050-042 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Data Processing | - Arrays and Structures
|
| File and I/O Processing | - File Operations
|
| IBM Enterprise PL/I Features | - Compiler and Runtime Features
|
| PL/I Language Fundamentals | - Data Types and Declarations
|
| Program Structure and Control | - Control Flow
|
IBM Developing with IBM Enterprise PL/I Sample Questions:
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. STATIC variables are allocated only once and can, therefore, be used for communication between
invocations. - C. The values of STATIC variables from the previous invocation are lost.
- D. STATIC variables are allocated and initialized at each new invocation.
Correct Answer: B 🗳️
Which code should NOT be split out into separate subroutines?
- A. Code which must be available on different platforms.
- B. Dead code in a program.
- C. Redundant code in a program.
- D. Redundant code in a group otprograms.
Correct Answer: B 🗳️
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 the last record with '2' in the first byte will be written twice 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 not all records with '2' in the first byte will be written to the output dataset.
Correct Answer: C 🗳️
The following function converts a character string to uppercase. What is the best way to improve the
performance?
SET_TO_UPPERCASE: PROC(CHARSTR) RETURNS (CHAR(120) VARYING);
DCL CHARSTR CHAR(120) VARYING;
DCL UCCHAR(26) INIT('ASCDEFGHIJKLMNOPQRSTUVWXYZ');
DCL LCCHAR(26) INlT('abcdefghijkImnopqrstuvxy'z');
DCL RCHAR(120) VARYING INIT(");
R = TRANSLATE(CHARSTR,UC,LC);
RETURN(R);
END SET_TO_UPPERCASE;
- A. Use VALUE on the declares for UC and LC.
- B. RETURN(TRANSLATE(CHARSTR,UC,LC)) to avoid the unnecessary assignment to R.
- C. Declare variables UC and LC as STATIC.
- D. Use the UPPERCASE function instead of SET_TO_UPPERCASE.
Correct Answer: D 🗳️
Which of the following is the most likely reason to use a debugger in a production environment?
- A. Test a program
- B. Enhance performance
- C. Ensure data integrity
- D. Investigate error situations
Correct Answer: D 🗳️
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