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IBM Developing with IBM Enterprise PL/I Sample Questions:

1. Given the following code, which call will pass a dummy argument?
PROG: PROC OPTIONS(MAIN);
DCL SUM01 DEC FIXED(5,0) INIT (7);
DCL SUM02 DEC FIXED(9,0) INIT (999);
CALL SUBA(SUM01,
SUM02);
CALL SUSB(SUM01,
SUM02);
CALL SUBC(SUM01,
SUM02);
CALL SUBD(SUM01,
SUM02);
SUBA PROC( PRM1,
PRM2);
DCL PRM1 DEC FIXED (5,0) BYVALUE,
PRM2 DEC FIXED (9,0);
END SUBA;
SUBB:PROC( PRM1,
PRM2);
DCL PRM1 DEC FIXED (5,0),
PRM2 DEC FIXED (9,0);
END SUBD;
SUBC: PROC( PRM 1,
PRM2);
DCL PRM1 BIN FIXED (15,0),
PRM2 DEC FIXED (9,0);
END SUBC;
SUBD:PROC( PRM 1,
PRM2);
DCL PRM1 DEC FIXED(5,0) BYADDR,
PRM2 DEC FIXED (9,0) SYADDP;
END SUBD;
END PROG;

A) CaII to SUBB
B) Call to SUBA
C) CaII to SUBD
D) CaII to SUBC

2. A junior programmer has written a 3000 statement program and has asked the team lead for help in
determining how to review it. Which of the following is the most appropriate response for the team lead?

A) Ask the programmer to compile it and run some tests to see if it can be broken.
B) Inform the programmer that a review is not necessary.
C) Request that the programmer set up an informal walkthrough with key members of the team.
D) Provide the programmer with a list of programming standards.

3. Given the following code, which is the only valid way to convert Q to P?
DCL Q OFFSET;
DCL P POINTER;
DCLX CHAR(100)BASED;
DCL A AREA(6000);
ALLOC X SET(Q) IN(A);

A) P = ADDR(A) + Q;
B) P = Q;
C) P = POINTER(Q,A);
D) P = POINTERVALUE(Q);

4. What could be used when a structure is passed to a subroutine to verify that the area the structure
occupies in storage has not been overwritten?

A) Structure is passed as an aggregate.
B) Structure has eyecatchers at start and at end.
C) Structure is passed as a pointer.
D) Structure has a length field at start.

5. The following coding standards are enforced at a programming shop:
* All procedures must include a comment describing its function
* All automatic variables must be explicitly initialized when declared * No nested IF statements (implement
as SELECT)
Considering the following code, how many coding standard violations exist?
CALL P1(1);
/* ------- proc p1------- */
P1: PROC(l);
DCL I BIN FIXED(31);
DCL (J,K) BIN FIXED(31) INIT(0);
IF I = 1
THEN IF J = 2
THEN K = 3;
ELSE K = 4;
ELSE K = 5;
END;

A) 1
B) 3
C) 2
D) 4

Solutions: