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IBM Developing with IBM Enterprise PL/I Sample Questions:

1. Requirement:
If the value of the numeric variable I is 1 it needs to be changed to 2 and vice versa. In all other cases it
must remain unchanged. Which of the following solutions meets the requirement and does not require
essential structural modifications when the requirement is changed to the following: If the value of the
numeric variable I is 512 it needs to be changed to 731 and if the value is 814 it needs to be changed to 5.
In all other cases it must be set to 111.

A) lF I = 1 ! 1 = 2
THEN I = 3 - I;
B) IF I = 1 THEN I = 2;
IF I = 2 THEN I = 1;
C) DCL ONETWO(2) BIN FIXED(15) INIT(2,1);
IF I = 1! I = 2
THEN I = ONETWO(I);
D) SELECT (I);
WHEN(1) I = 2;
WHEN(2) I = 1;
OTHER;
END;

2. Given the following declarations, a list of 100 elements must be created so that the element created last
can be accessed as the first element of the list. A new element is always inserted in front of the element
created before. The variable NEXT in the last element should contain the value NULL. Which of the
following pieces of code implements this?
DCL 1 NODE BASED (ANCHOR).
2 NEXT POINTER,
2 DATA FIXED BIN(31);
DCL ANCHOR POINTER;
DCL P POINTER INIT (NULL());
DCL I FIXED BIN(31);

A) I = 1 TO 100; ALLOCATE NODE; NODE.DATA = I; NODE.NEXT = P; ANCHOR = P; END;
B) DO I = 1 TO 100; NODE.DATA = I; NODE.NEXT = P; ALLOCATE NODE; P = ANCHOR; END;
C) DO I = 1 TO 100; P = ANCHOR; ALLOCATE NODE; NOTE.DATA = I; NODE.NEXT = P; END;
D) DO I = 1 TO 100; ALLOCATE NODE; NODE.DATA = I; NODE.NEXT = P; P = ANCHOR; END;

3. Which of the following is the most appropriate way of avoiding a recursive deadlock?

A) Aborting the Transaction
B) Changing the program
C) Partitioning the relevant Database
D) Setting a time limit on the runtime of the Transaction

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

5. 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 NATIVE.
B) The program must declare the FIXED BINARY fields with the attribute LITTLEENDIAN.
C) Nothing needs to be changed.
D) The program must declare the FIXED BINARY fields with the attribute BIGEND IAN.

Solutions: