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IBM C9050-042 Exam Syllabus Topics:

IBM Developing with IBM Enterprise PL/I Sample Questions:

1. Given the following statements, where will the variables A, B and C be allocated?
DCL A FIXED;
DCL B CHAR(80) BASED(P);
DCL C CHAR(1000) CONTROLLED;
DCL D AREA(1000);
DCL P PTR STATIC;
ALLOC C;
ALLOC B IN(D);

A) A in STACK, B in STATIC, C in HEAP
B) A in HEAP, Band C are in STACK
C) A and B are in STACK, C in HEAP
D) A in STACK, B and C are in HEAP

2. Given the following declarations, which is the WORST way of setting D from 5?
DCL 1 S,
2 A(100) CHAR(1),
2 B(100) CHAR(2),
2 C(100) CHAR(3);
S = "; DCL D CHAR(600);
DCLI BIN FIXED(31);

A) D = STRING(S);
B) CALL PLIOVER(ADDR(D)ADDR(S),600);
C) DO I = 1 TO 100;
SUBSTR(D,I,1) = S.A(l);
SUBSTR(D,1 01 + ((I-1) *2),2) = S.B(I);
SUBSTR(D,301 + ((I-1) *3),3) = S.C(I);
END;
D) D = STRING(A) !! STRING(S) !! STRING(C);

3. Prerequisite:
A sorted input dataset with record length 100 contains at least one record for each of the values '1', '2', '3'
in the first byte. The applied sort criteria is 1,100,ch,a.
Requirements:
1 .) All records with '1' in the first byte must be ignored.
2 .) All records with '2' in the first byte must be written to the output dataset.
3 .) If there is a '3' in the first byte, the read iteration must be left.
4 .) The program must not abend or loop infinitely.
If the code below does not fulfill the specifications provided above, which of the following is the most likely
reason?
DCL DDIN FILE RECORD INPUT;
DCL DDOUT FILE RECORD OUTPUT;
DCL 1 INSTRUC,
3 A CHAR(1),
3 * CHAR(99);
DCL EOF_IN BIT(1) INIT('0'B);
DCL (Z1,Z2,Z3,ZO) BIN FIXED(31) INIT(0);
ON ENDFILE(DDIN) EOF_IN = '1'B;
READ FILE(DDIN) INTO (INSTRUC);
LOOP: DO WHILE (^EOF_IN);
SELECT(INSTRUC.A);
WHEN('1') DO;
Z1 +-= Z1;
ITERATE LOOP;
END;
WHEN('3') DO;
Z3 = Z3+1;
LEAVE LOOP;
END;
WHEN('2') DO;
Z2 = Z2+1;
WRITE FILE(DDOUT) FROM(INSTRUC);
END;
OTHER DO;
ZO = ZO+1;
PUT SKIP LIST(INSTRUC.A);
END;
END;/*select*/
READ FILE(DDIN) INTO(INSTRUC);
END ;/*loop*/

A) The code fulfills the requirement.
B) The code does not fulfill the requirement because the program will loop infinitely.
C) The code does not fulfill the requirement because not all records with '2' in the first byte will be written to the output dataset.
D) The code does not fulfill the requirement because the last record with '2' in the first byte will be written twice to the output dataset.

4. An external subroutine procedure requires 10 variables belonging to an input file and 10 variables
belonging to an output file. What is best practice in passing these variables to the procedure?

A) Pass the 20 variables individually in the parameter list.
B) Declare the 20 variables EXTERNAL in both the calling program and in the procedure called and pass
no variable in the parameter list.
C) Integrate the 20 variables in one structure and pass the address of the structure in the parameter list.
D) Integrate the 10 variables belonging to the input file in one structure and the 10 variables belonging to
the output file in another one and pass the addresses of them as parameters to the procedure.

5. A lead developer reviewing code from one of the programmers found the following code. What should the
programmer be told about BY NAME assignments?
DCLl STR1, 3FB15 FIXED BIN (15), 3 CH10 CHAR (10), 3 NAME CHAR (25). 3 ADDR CHAR (30), 3
FB31 FIXED BIN(31);
DCL 1 STR2, 3 FB31 FIXED BIN (31), 3 FB31B FIXED BIN (31), 3 NAME CHAR (20), 3 ADDR CHAR
(30), 3 CH20 CHAR (20);
STR2 = STR1, BY NAME;

A) They are incorrect and should be replaced by individual assignments.
B) They can have inadvertent side effects and the code should be analwed.
C) They do not work in this case and the code should be replaced by individual assignments.
D) There is nothing wrong with using BY NAME assignments in this situation.

Solutions: