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IBM Developing with IBM Enterprise PL/I Sample Questions:

1. The lead developer on a project has just learned that Pat, a highly skilled programmer on the team, has
been reassigned. The lead developer is familiar with Pat's work and is concerned because no one on the
team has the necessary skills to pick up the work immediately. A new employee with the required skills is
joining the team next week, but the timeline for a mission critical milestone has been moved up to the end
of this week. Which of the following is the most appropriate action for the lead developer to take to ensure
that the critical milestone is met?

A) Direct the team to cover all of Pat's work until the new employee arrives.
B) Personally cover the work until the new employee arrives.
C) Explain to the team why this change in schedule is important to the customer.
D) Explore with the team whether they will be able to meet the new deadline.

2. 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;

3. WIDECHAR can be converted to CHAR. Which rule has to be observed?

A) Each WIDECHAR value has to be less than '0080'WX, otherwise CONVERSION is raised.
B) All WIDECHAR values can be converted to CHAP using the appropriate builtin function.
C) Each WIDECHAR value has to be less than or equal to '00FF'WX, otherwise CONVERSIONis raised.
D) By conversion of WIDECHAR to CHAR the left byte is omitted.

4. Requirement:
All the characters of the CHAR(3) variable X must be tested to be numeric. Which of the following
solutions meets the requirement and does not require essential structural modifications when the
requirement is changed to the following: The first character of the CHAR(3) variable X must be tested to
be uppercase alphabetic, while the two other characters must be tested to be numeric.

A) DCL NUM CHAR(10) VALUE('0l 23456789');
IF VERIFY(X,NUM) = 0
THEN ... /*NUMERIC*/
B) DCL ALPHA CHAR(26) VALUE('ABCDEFGHIJKLMNOPQRSTUVWXYZ');
DCL NUM CHAR(10) VALUE('0123456789');
IF TRANSLATE(X,(26)'A'!I(10)'9'ALPHA!!NUM) = '999'
THEN ... ; /*NUMERIC*/
C) DCL Y PIC'999';
DCL SWITCH BIT(1) INIT('1'B);
ON CONVERSION BEGIN;
SWITCH =
ONSOURCE = '000';
END;
Y = X;
IF SWITCH
THEN ... ; /*NUMERIC*/
D) IFX >= '000' & X <= '999'
THEN ... /*NUMERIC*/

5. In a multithreading environment, when can a deadlock occur between two threads, if at all?

A) It can neveroccur.
B) When they have both locked a resource that the other one requires
C) When they are operating synchronously
D) When both access the same memory area

Solutions: