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IBM Developing with IBM Enterprise PL/I Sample Questions:

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

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

2. In which of the following cases is a performance analyzer tool NOT useful?

A) To locate program hangs and deadlocks
B) To time and tune programs
C) To identify the code causing a storage overlay
D) To show the frequency and duration of function calls

3. Which of the following is generally NOT an area of concern when calling a program written in another
language from PL/I?

A) Acceptable calling conventions
B) Data mapping
C) Storage management
D) Condition handling

4. Given the following declaration, what declaration of B would cause the structure Ato be invalid?
DCL K FIXED BIN (31) VALUE (10);
DCL P POINTER;
DCL 1 A BASED (P),
2 B FIXED BIN(31),
2 C DIM (K REFER (B)),
3 D FIXED BIN(31),
3 E CHAR (4);
ALLOCATE A;

A) 2B FIXED BIN(31) INIT (20),
B) 2B FIXED BIN(31) INIT (10),
C) 2B FIXED BIN (31) INIT (K),
D) 2B FIXED BIN (31),

5. Given the following code, which set of statements will insert the new element into the doublylinked list
after the element pointed to by P?
DCL1X BASED,
2 FORWARD POINTER,
2 BACKWARD POINTER,
2 DATA FIXED BIN (31);
ALLOC X SET(Q);

A) P->FORWARD->BACKWARD = Q;
P->FORWARD = Q;
Q->FORWARD = P->FORWARD;
Q->BACKWARD = P;
B) Q->FORWARD = P;
Q->BACKWARD = P->BACKWARD;
P->FORWARD = Q
P->BACKWARD = Q;
C) Q->FORWARD = P-> FORWARD;
Q->BACKWARD = P;
P->FORWARD->BACKWARD = P;
P->FORWARD = Q;
D) Q->FORWARD = P->FORWARD;
Q->BACKWARD = P;
P->FORWARD = Q;
P->FORWARD->BACKWARD = Q;

Solutions: