最も有効な C9050-042 試験参考書

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 last record with '2' in the first byte will be written twice to the output dataset.
• 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 program will loop infinitely.

The following program was written to copy a dataset with record length of 100 to another dataset. If this
requirement has not been fulfilled, which is the most likely reason?
DCL DDIN FILE RECORD INPUT;
DCL DDOUT FILE RECORD OUTPUT;
DCL INSTRUC CHAR(100);
DCL EOF_IN BIT(1) INIT('0'B);
ON ENDFILE(DDIN) EOF_IN = '1'B;
DO UNTIL (EOF_IN);
READ FILE (DDIN) INTO(INSTRUC);
WRITE FILE(DDOUT) FROM(INSTRUC);
END;

• A. The code fulfills the requirement.
• B. The code does not fulfill the requirement because too many records will be written to the output
  dataset.
• C. The code does not fulfill the requirement because the input structure is the same as the output
  structure.
• D. The code does not fulfill the requirement because the OPEN statements are missing.

A file containing FIXED BINARY fields that is written by a PL/I program on Intel Architecture is to be read
by PL/I programs on Intel Architecture and on the mainframe. What must be changed in the program
which reads the file on Intel architecture, if anything, for it to work correctly when it run s on the
mainframe?

• A. Nothing needs to be changed.
• B. The program must declare the FIXED BINARY fields with the attribute LITTLEENDIAN.
• C. The program must declare the FIXED BINARY fields with the attribute NATIVE.
• D. The program must declare the FIXED BINARY fields with the attribute BIGEND IAN.

Which of the following is a best practice to make debugging easier?

• A. CALL PLIDUMP('TFCHAB','Spot Dump'); at key points in the program logic.
• B. Have the calling program test the return code after the call.
• C. Use a variable updated with the program name.
• D. Use the runtime option STORAGE(00,,00,0K)

What will be printed, if anything, to SYSPRINT after the following statements are executed?
CALL REVERSEIT('PL/I');
(SUBSCRIPTRANGE,SIZE,STRINGSIZE):
REVERSEIT:PROC(31);
DCL(I,J) BIN FIXED(31);
DCL (S,T) CHAR(100) VARYING;
T = S;
J = 0;
I = 0;
DO I = LENGTH(S) TO 1;
J = J + 1;
SUBSTR(T,J,1) = SUBSTR(S,I,1);
END;
PUT(T);
END;

• A. STRINGSIZE error will be raised.
• B. SUBSCRIPTRANGE error will be raised.
• C. 'PL'I'
• D. 'I/LP'