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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) D CL 1 A,
2 B FIXED BIN(31) BIGENDIAN,
2 C CHAR (100) VAR,
2 D CHAR (10);
B) DCL1 A,
2 B FIXED BIN(31) LITTLEENDIAN,
2 C CHAR (100) VAR LITTLEENDIAN,
2 D CHAR (10);
C) DCL1 A,
2 B FIXED BIN(31) LITTLEENDIAN,
2 C CHAR (100) VAR,
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 (incomplete) code, how is Q to be declared in order to allocate X in A?
DCL A AREA;
DCL Q ...
DCL X FIXED BIN (31) BASED (Q);
ALLOCATE X;

A) ... BASED(A);
B) ... OFFSET(A);
C) ... POINTER;
D) ... OFFSET;

3. 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 (10),
B) 2B FIXED BIN (31) INIT (K),
C) 2B FIXED BIN (31),
D) 2B FIXED BIN(31) INIT (20),

4. A given PL/I program has a big nesting depth. Which of the following measures will help to reduce the
nesting depth in most cases?

A) Avoiding OTHER clauses
B) Avoiding ELSE clauses
C) Using SELECT constructs instead of If-THEN-ELSE
D) Using DO-WHILE as the only loop technique

5. Given the following declarations, which code is likely to perform best and correctly initialize structure 3?
DCL 1 S UNALIGNED, 2 A CHAR(3), 2 B BIN FIXED(31), 2 C DEC FIXED(5); DCL 1 T UNALIGNED
LIKE S; T = ";

A) CALL PLIFILL(ADDR(S),'',STG(S));
B) CALL PLIMOVE(ADDR(S),ADDR(T),STG(S));
C) S = ";
D) S = T,BY NAME;

Solutions: