IBM C9050-042 問題集

質問 1：
A software package utilizes several licensed third party software components and will be sold to multiple
customers who will also need runtime licenses. What information is LEAST appropriate to provide in a
technical operations guide?
A. The price or the third party software components
B. The required release level or the third party software components
C. The URL for the third party vendor
D. The contact information of the third party vendors
正解：A

質問 2：
Which of the following is NOT part of the PL/I code review?
A. Decision whether the review object is a appropriate solution
B. Documentation of results of the review
C. Attendance of people with technical expertise
D. Training course for the program's author
正解：D

質問 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 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 4：
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. 'I/LP'
B. 'PL'I'
C. STRINGSIZE error will be raised.
D. SUBSCRIPTRANGE error will be raised.
正解：B

質問 5：
In a multithreading environment, when can a race condition occur between two threads?
A. When they cause a deadlock
B. When they periorm an operation on same memory area
C. When the threads have the same priority
D. When they operate synchronously
正解：B

質問 6：
What is a program specification document?
A. The history of changes of the program and how it was used
B. A description of what the program does and how it can be used
C. A description of how the program does its work
D. The pseudocode of the program
正解：B

質問 7：
A module which is serially reusable has which of the following characteristics?
A. All or part of it may be replaced at any time by the operating system
B. Is intended for single use only and must be refreshed from disk before it can be invoked again
C. Must contain the necessary logic to reset control variables and data areas at entry or exit and a second
task may not enter the module until the first task has finished
D. Is designed for concurrent execution by multiple tasks
正解：C

質問 8：
Which of the following is a best practice to make debugging easier?
A. Use the runtime option STORAGE(00,,00,0K)
B. Have the calling program test the return code after the call.
C. Use a variable updated with the program name.
D. CALL PLIDUMP('TFCHAB','Spot Dump'); at key points in the program logic.
正解：D