IBM C9050-042 問題集

質問 1：
Given the following code, what measure will improve stability?
S1: PROC (I) RETURNS(CHAR(10));
DCL I BIN FIXED (15);
DCL T (-1:1) CHAR(10) INIT('NOTFOUND' ,'OK'.'ENDFILE');
RETURN(T(l)); END S1;
A. Check, if the value of I is nositive.
B. Check the length of the RETURN value.
C. Check, if the value of I is within T's bounds.
D. Check I for valid numeric data.
正解：C

質問 2：
Given the following declaration, W has to be assigned to C.
How can a CONVERSION condition be
avoided?
DCL C CHAR(1);
DCL W WIDECHAR(1);
A. IFW >128THEN
PUT ('Widechar is not a valid char!');
ELSE
C = W;
B. IF RANK(W)> 127 THEN
PUT ('Widechar is not a valid char!');
ELSE
C = W;
C. IF WCHARVAL(W) > 128 THEN
PUT ('Widechar is not a valid char!');
ELSE
C = W;
D. IFW ^= CHAR(W)THEN
PUT ('Widechar not is a valid char!');
ELSE
C = W;
正解：B

質問 3：
What are the requirements on data to apply parallelization in a program?
A. It should follow the Hierarchical model.
B. It should be partition able.
C. It should follow the Object model.
D. It should follow the Relational model.
正解：B

質問 4：
Given the following declaration, what is the most efficient way of setting C from A?
DCLA BIN FIXED(31) INIT(-123);
DCL C CHAR(6);
DCL P PlC '---- 9' DEFINED C;
A. PUT STRING(C) LIST(A);
B. P = A;
C. C = A;
D. PUT STRING(C) EDIT(A)(F(6));
正解：B

質問 5：
Requirement:
If the value of the numeric variable I is 1 it needs to be changed to 2 and vice versa. In all other cases it
must remain unchanged. Which of the following solutions meets the requirement and does not require
essential structural modifications when the requirement is changed to the following: If the value of the
numeric variable I is 512 it needs to be changed to 731 and if the value is 814 it needs to be changed to 5.
In all other cases it must be set to 111.
A. IF I = 1 THEN I = 2;
IF I = 2 THEN I = 1;
B. SELECT (I);
WHEN(1) I = 2;
WHEN(2) I = 1;
OTHER;
END;
C. DCL ONETWO(2) BIN FIXED(15) INIT(2,1);
IF I = 1! I = 2
THEN I = ONETWO(I);
D. lF I = 1 ! 1 = 2
THEN I = 3 - I;
正解：B

質問 6：
What characterizes the hierarchical data model with respect to data access?
A. Data access can only be via an index.
B. Data access supports parent-child relationships.
C. Data access can only be sequential.
D. Data access supports tables.
正解：B

質問 7：
Given the following declaration, what declaration of B would cause the structure Ato be invalid?
DCL K FIXED BIN (31) VALUE (10);
DCL P POINTER;
DCL 1 A BASED (P),
2 B FIXED BIN(31),
2 C DIM (K REFER (B)),
3 D FIXED BIN(31),
3 E CHAR (4);
ALLOCATE A;
A. 2B FIXED BIN(31) INIT (20),
B. 2B FIXED BIN (31),
C. 2B FIXED BIN(31) INIT (10),
D. 2B FIXED BIN (31) INIT (K),
正解：A

質問 8：
In which of the following groups of compiler options could all the options specified cause the compiler to
generate code which requires more time at execution?
A. OPTIMIZE(2),DEFAULT(REORDER,NOLAXDCL,NOLAXCTL),STORAGE,MMTEMP(1000)
B. APCH(5),BIFPREC(31),NOTESTMTUNE(5),NOSERVICE
C. ATTRIBUTES(FULL),XREF(FULL),DEFAULT(EVENDEC,DUMMY(UNALIGNED)),OFFSET
D. OPTIMIZE(0),NOREDUCE,PIREFIX(SIZE,SUBSCRIPTRANGE)
正解：D