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IBM Developing with IBM Enterprise PL/I Sample Questions:

1. What does it mean that an interface is asynchronous?

A) Requests are always processed immediately.
B) Requests are processed in parallel.
C) Requests are processed in FIFOorder.
D) Requesting program does not have to wait for a reply.

2. What does it mean that an interface is synchronous?

A) Requesting program must wait for a reply
B) Requests are processed randomly
C) Requests are processed in parallel
D) Requesting program always receives immediate response

3. Which software model is LEAST appropriate it requirements keep changing?

A) Object-oriented model
B) Rapid Application Development model
C) Waterfall model
D) Spiral model (also known as Iterative model)

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

5. What is the output of the following program?
DCL A AREA(8000);
DCL 1 STR1 BASED(P),
2 STR1_LGTH BIN FIXED(31),
2 STR_CHAR CHAR(ALLOC_LGTH REFER(STR1_LGTH));
DCL ALLOC_LGTH BINFIXED(31);
DCL I FIXED BIN(31);
DCL P PTR;
ALLOC_LGTH = 100;
DO I = 1 TO 10;
ALLOC STR1 IN(A);
END;
PUT SKIP LIST(CSTG(A));

A) 1040
B) 8000
C) 1016
D) 1056

Solutions: