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IBM C9050-042 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Performance and Optimization | 15% | - I/O and processing performance - Memory and storage efficiency - Compiler options and runtime tuning |
| Debugging, Testing and Maintenance | 15% | - Compilation and listing analysis - Debugging techniques and tools - Unit testing and code validation |
| PL/I Language Fundamentals | 25% | - Syntax and data types - I/O operations and file handling - Procedures and functions - Variables, constants, and expressions - Control structures |
| File Processing and Database Connectivity | 20% | - Sequential and VSAM file processing - Database connectivity and SQL integration - Data manipulation and transaction control |
| Advanced PL/I Concepts | 25% | - Object-oriented features in PL/I - Structures and records - Pointers and dynamic memory allocation - Strings and arrays - Error and exception handling |
IBM Developing with IBM Enterprise PL/I Sample Questions:
Question 1
A file containing FIXED BINARY fields that is written by a PL/I program on Intel Architecture is to be read
by PL/I programs on Intel Architecture and on the mainframe. What must be changed in the program
which reads the file on Intel architecture, if anything, for it to work correctly when it run s on the
mainframe?
A. The program must declare the FIXED BINARY fields with the attribute LITTLEENDIAN.
B. Nothing needs to be changed.
C. The program must declare the FIXED BINARY fields with the attribute NATIVE.
D. The program must declare the FIXED BINARY fields with the attribute BIGEND IAN.
Question 2
In a multithreading environment, when can a race condition occur between two threads?
A. When they operate synchronously
B. When they periorm an operation on same memory area
C. When they cause a deadlock
D. When the threads have the same priority
Question 3
What happens after executing the following code, assuming the input file has more than 1 record?
DCL INPFILE FILE RECORD INPUT ENV(VB RECSIZE(100)); DCL P PTR;
DCL B CHAR(100) VARYING BASED(P);
DCLC CHAR(110) VARYING BASED(P);
READ FILE(INPFILE) SET(P);
C=B!! 'EXTENDED
READ FILE(INPFILE) SET(P);
A. Two records are read.
B. Protection exception because of the reference to B.
C. ENDFILE condition is raised on the second read.
D. The results are unpredictable.
Question 4
Which of the following compiler options should be checked first when addressing performance issues in a
PL/I program?
A. ATTRIBUTES and LIST
B. RENT and MAXMEM
C. OPT and DEFAULT
D. ARCH and MAXSTMT
Question 5
Input to a SORT routine requires the starting position of each field to be sorted. Which of the following
calculates a value of 5 for field B?
DCL 1 S,
2 A CHAR(4),
2 B BIN FIXED(31);
A. POINTERDIFF(ADDR(S.B), ADDR(S))
B. POINTERDIFF(ADDR(S), ADDR(S.B)) + 1
C. POINTERDIFF(ADDR(S), ADDR(S.B))
D. POINTERDIFF(ADDR(S.B),ADDR(S)) + 1
Solutions:
| Question 1 Answer: A | Question 2 Answer: B | Question 3 Answer: D | Question 4 Answer: C | Question 5 Answer: D |
