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IBM Developing with IBM Enterprise PL/I Sample Questions:

1. The following structure is used when writing a file on Intel architecture which is sent to the mainframe:
DCL 1 A,
2 B FIXED BIN(31),
2 C CHAR (100) VAR,
2 D FIXED BIN(31);
How must this structure be declared on the mainframe if the file is to be read correctly?

A) DCL1 A,
2 B FIXED BIN(31) LITTLEENDIAN,
2 C CHAR (100) VAR,
2 D CHAR (10);
B) D CL 1 A,
2 B FIXED BIN(31) BIGENDIAN,
2 C CHAR (100) VAR,
2 D CHAR (10);
C) DCL1 A,
2 B FIXED BIN(31) LITTLEENDIAN,
2 C CHAR (100) VAR LITTLEENDIAN,
2 D CHAR (10);
D) DCL1 A,
2 B FIXED BIN(31) BIGENDIAN, 2 C CHAR (100) VAR BIGENDIAN, 2 D CHAR (10);

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

3. Which of the following PL/I features is NOT new with Enterprise PL/I?

A) Writing numeric constants with the underscore sign as a separator.
B) VALUE attribute for named constants.
C) UNIONs or CELLs to assign identical storage to different variables.
D) Using hexadecimal constants.

4. A program reads an input file into a structure with 20 fields. Fifteen of these are required as parameters in
an external procedure. Which of the following is the most efficient way of passing these parameters?

A) Create a structure, assign the 15 variables to it and pass it as one argument.
B) Pass 15 variables in a parameter list.
C) Pass the address of the input structure as one argument.
D) Create a structure, assign the 15 variables to it and pass the address of it in one argument.

5. Given the following declaration for X:
DCLX FIXED DEC(3) INIT (123);
If Y is declared as CHAR, what should its minimum length be to preserve the value 123 if these
statements are executed?
Y = X;
X =Y;

A) 5
B) 4
C) 6
D) 3

Solutions: