IBM C9050-042 問題集

質問 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 the program will loop infinitely.
B. The code fulfills the requirement.
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.
正解：A

質問 2：
Which of the following would a non-technical manager be LEAST interested in regarding migration to
Enterprise PL/I?
A. How many programs would be affected and the effort required
B. Whether training programs would be needed
C. Amount of computer resources needed for the conversion
D. Which Enterprise compiler options should be specified
正解：D

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

質問 4：
Which compiler option causes the compiler to flag any reference to structure members that are not level 1
and are not dot qualified?
A. RULES(NOLAXSTRUCT)
B. PULES(NOLAXDOT)
C. RULES(NDLAXQUAL)
D. RULES(NOLAXLEVEL1)
正解：C

質問 5：
A compiler listing annotated with execution counts per statement helps identify all of the following
EXCEPT
A. Unexecuted statements and procedures
B. Opportunities for code optimization
C. Potentially miscoded conditions in IFs, WHEREs, WHILEs, and UNTILs
D. Calls to library routines
正解：D

質問 6：
Given the following code, which is the only valid way to convert Q to P?
DCL Q OFFSET;
DCL P POINTER;
DCLX CHAR(100)BASED;
DCL A AREA(6000);
ALLOC X SET(Q) IN(A);
A. P = POINTER(Q,A);
B. P = ADDR(A) + Q;
C. P = Q;
D. P = POINTERVALUE(Q);
正解：A

質問 7：
PL/I programs which have been written under Intel architecture are now to be recompiled and run on the
mainframe. What will happen to the programs during compilation and execution?
A. They can be recompiled unchanged and will run correctly.
B. They will not run correctly because the byte order on mainframe is bigendian.
C. They will not compile correctly on mainframe because ASCII has no NOT sign.
D. They may have to be changed before they run correctly on the mainframe.
正解：D

質問 8：
Given the following code:
DCL INDATA FILE RECORD INPUT;
DCL INSTRUC CHAR(100);
DCL EOF BIT(1) INIT('0'B);
ON ENDFILE(INDATA) EOF = '1'B;
OPEN FILE(INDATA);
READ FILE(INDATA) INTO(INSTRUC);
DO WHILE (^EOF);
CALL SR_PROCESS;
READ FILE(INDATA) INTO(INSTRUC);
END;
CLOSE FILE(INDATA);
If the database (input file) changes from OS-PS to DB2 view and the necessary syntax has been changed
accordingly, which of the following DB2-related steps is NOT additionally required to guarantee the same
level of stability and functionality?
A. Set the EOF bit to '1'B, if SQLCODE = 100 (not found).
B. Check the SQLCODE after each EXEC SQL OPEN / CLOSE statement.
C. Check the SQLCODE after each EXEC SQL FETCH statement.
D. Check the CURRENT SQLI
正解：D