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IBM Developing with IBM Enterprise PL/I Sample Questions:

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.

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

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.

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

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: