IBM C6030-041 問題集

質問 1：
CORRECT TEXT
Which of the following is a restriction using the BYVALUE attribute?
A. It can be specified only for scalar arguments and parameters that can be passed in registers.
B. It can be specified only for aggregate arguments and parameters.
C. It can be specified only for scalar arguments and parameters with a size of four bytes.
D. It can be specified only for scalar arguments and parameters whose lengths and sizes are
known at compile time.
正解：D

質問 2：
CORRECT TEXT
Given the following declarations, which code would assign 1234561.23 to A?
DCL A DEC FIXED (15,3) NIT (123456.123);
DCL B BIN FIXED (15) INIT (10);
A. A = BIN(A) * DEC(B);
B. A = BIN(A)*B;
C. A = A*B;
D. A = A*DEC(B);
正解：D

質問 3：
CORRECT TEXT
Given the following piece of code, how many times is the loop executed?
DCLI FIXED BIN (31);
I = 20;
DO UNTIL (I = 0); PUT (I);
I = I - 3;
END;
A. less than 6 times
B. more than 7 times
C. 6
D. 7
正解：B

質問 4：
CORRECT TEXT
If the physical dataset referred to by DDOUT has a maximum record length of 200 and RECFM=V,
what happens alter executing the following code?
DCL DDOUT FILE RECORD OUTPUT;
DCLI BIN FIXED(15) INIT(0);
DCL 1 OUTSTR,
2 A CF-IAR(150),
2 B CI-IAR(46);
OPEN FILE(DDOUT);
DO It 1 TO 10;
WRITE FILE(DDOUT) FROM(OUTSTR);
END;
A. 10 records will be written to the output file.
B. At compile time, an error will occur because of mismatch of record length.
C. Nothing will be written to the output file.
D. At runtime, an error will occur because of mismatch of record length.
正解：A

質問 5：
CORRECT TEXT
What happens, if anything, after end of rile has been reached in the following code?
DCL INF FILE RECORD INPUT;
DCL INFIELD CHAR(100) BASED(P);
DCL P PTR;
DCL EOF BIT(1) INIT('0'B);
ON ENDFILE(INF) BEGIN;
EOF = '16;
ALLOC INFIELD;
INFIELD = 'EOF REACHED';
END;
OPEN FILE(INF);
READ FILE(INF) SET(P);
DO WHILE(^EOF);
READ FILE(INF) SET(P);
END;
A. There will be an infinite
loop.
B. Nothing because end of file will never be reached.
C. Runtime error because there
SE statement.
D. INFIELD will have a value 'EOF REACHED' and the program ends.
正解：D

質問 6：
CORRECT TEXT
If the following syntax is incorrect, how should the syntax be changed?
READ FILE(DDIN) IN STRUC1;
A. READ FILE(DDIN) IN(STRUC1);
B. READ FILE(DDIN) INTO STRUC1;
C. READ FILE(DDIN) INTO(STRUC1);
D. No changes are necessary.
正解：C

質問 7：
CORRECT TEXT
Given the following code:
DCL (K, L) FIXED BIN (31) INIT G(0);Certified @ TEST-KINGS.COM
DCL SUB ENTRY( FIXED BIN(31) BYADDR, FIXED BIN(31)) OPT IONS(BYVALUE);
CALL SUB(K, L);
PUT(K, L);
and the following external procedure:
SUB: PROCEDUPE(K, L) OPTIONS( BYVALUE); DCL (K BYADDR, L) FIXED BIN(31);
K = 10;
L = 10;
END;
Which numbers are output by the PUT statement?
A. 0,0
B. 0,10
C. 10,10
D. 10,0
正解：D