IBM C9050-042

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IBM Developing with IBM Enterprise PL/I Sample Questions:

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

2. Given the following declaration for X:
DCLX FIXED DEC(3) INIT (123);
If Y is declared as CHAR, what should its minimum length be to preserve the value 123 if these
statements are executed?
Y = X;
X =Y;

A) 5
B) 3
C) 4
D) 6

3. Given the lollowing declarations, what statement will raise STRINGSIZE condition if enabled?
DCLA_STR CHAR (100) VARYING;
DCLB_STR CHAR(10) STATIC;
DCL C_STR CHAR (100);

A) C_STR = B_STR;
B) SUBSTR(C_STR, 92) = B_STR;
C) A_STR = B_STR;
D) C_STR = A_STR;

4. Which of the following runtime options should be reviewed when attempting to improve performance in a
PL/I program?

A) ALL31, STORAGE, HEAP and STACK
B) TRACE, TRAP, CHECK and DEBUG
C) DEPTCONDLMT, INFOMSGFILTER, MSGFILE and RPTOPTS
D) ERRCOUNT, LIBSTACK, HEAPPOOLS and XPLINK

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) 2
B) 3
C) 4
D) 1

Solutions: