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IBM Developing with IBM Enterprise PL/I Sample Questions:

1. A lead developer reviewing code from one of the programmers found the following code. What should the
programmer be told about BY NAME assignments?
DCLl STR1, 3FB15 FIXED BIN (15), 3 CH10 CHAR (10), 3 NAME CHAR (25). 3 ADDR CHAR (30), 3
FB31 FIXED BIN(31);
DCL 1 STR2, 3 FB31 FIXED BIN (31), 3 FB31B FIXED BIN (31), 3 NAME CHAR (20), 3 ADDR CHAR
(30), 3 CH20 CHAR (20);
STR2 = STR1, BY NAME;

A) They are incorrect and should be replaced by individual assignments.
B) They do not work in this case and the code should be replaced by individual assignments.
C) There is nothing wrong with using BY NAME assignments in this situation.
D) They can have inadvertent side effects and the code should be analwed.

2. A mainframe project is behind schedule and a project leader has only one copy of a PC-based PL/I
compiler available for distribution to team members who are all eager to use it. Optimally, to whom should
it be provided first?

A) The person in the critical path
B) The project leader and her manager
C) The person who does the most PL/I development
D) The person who makes the greatest demand

3. Which of the following may be an advantage of the BEGIN OPTIONS (INLINE) statement?

A) The program uses less stack storage.
B) The program uses less heap storage.
C) The program runs faster because all variables declared inside the BEGIN block are already allocated
when the block containing the BEGINblock is entered.
D) The code runs faster because more variables will be optimized in the BEGINblock.

4. Which of the following structures will NOT contain padding bytes if the PL/I default for alignment is
applied?

A) DCL 1 A, 2 B FLOAT DEC (16), 2 F FLOAT DEC (16), 2 E FIXED BIN (31), 2 C FIXED DEC (5,2), 2 D
CHAR (3);
B) DCL 1 A, 2 E FIXED BIN (31), 2 C FIXED DEC (5,2), 2 B FLOAT DEC (16), 2 F FLOAT DEC (16), 2 D
CHAR (3);
C) DCL 1 A, 2 B FLOAT DEC (16), 2 F FLOAT DEC (16), 2 C FIXED DEC (5,2), 2 E FIXED BIN (31), 2 D
CHAR (3);
D) DCL 1 A, 2 B FLOAT DEC (16), 2 C FLOAT DEC (5,2), 2 D CHAR (3), 2 E FIXED BIN (31), 2 F FLOAT
DEC (16);

5. What happens to AUTOMATIC variables when a procedure is called recursively?

A) The values from the previous invocation are lost.
B) The values from previous invocations are preserved but can be overwritten in the new invocation.
C) The values from the previous invocation are saved and are available when the current invocation ends.
D) The values from the previous invocation are saved and are available to the new invocation.

Solutions: