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IBM C9050-042 Exam Syllabus Topics:

IBM Developing with IBM Enterprise PL/I Sample Questions:

1. Requirement:
The function LEAPYEAR evaluates a given 4-digit number and returns '1'B if it is a leap year, '0'B if it is
not. This function is supposed to work for the years 2004 to 2015.
Leap years occur every four years, except for years ending in 00 that are not divisible by 400. Which of
the following solutions meets the requirement and does NOT need to be changed if the requirement
changes to: The function is supposed to work for the years 1900 to 3000.

A) LEAPYEAR:PROC(YEAR) RETURNS(BIT(1));
DCL YEAR PlC '9999';
DCL (MOD,VERIFY) BUILTIN;
SELECT;
WHEN (VERIFY(YEAR '0123456769') ^= 0) RETURN('0'B); WHEN (MOD(YEAR,100) = 0)
RETURN('0'B);
WHEN (MOD(YEAR,400) = 0) RETURN('1'B);
WHEN (MOD(YEAR,4) = 0) RETURN('1'B);
OTHERRETURN('0'B);
END;
END LEAPYEAR;
B) LEAPYEAR:PROC(YEAR) RETURNS(BIT(1));
DCL YEAR PlC '9999';
DCL (MOD,VERIFY) BUILTIN;
SELECT;
WHEN (VERIFY(YEAR '0123456789') ^= 0) RETURN('0'B);
WHEN (MOD(YEAR,400) = 0) RETURN('l'B); WHEN (MOD(YEAR,100) = 0) RETURN('0'B);
WHEN (MOD(YEAR,4) = 0) RETURN('1'B); OTHER RETURN('0'B);
END;
END LEAPYEAR;
C) LEAPYEAR: PROC(YEAR) RETURNS(BIT(1));
DCL YEAR PlC '9999';
DCL VERIFY BUILTIN;
IFVERIFY(YEAR,0123456789)^= 0 THEN RETURN('0'B);
SELECT(YEAR);
WHEN (2004) RETURN('1'B);
WHEN (2008) RETURN('1'B);
WHEN (2012) RETURN('1'B);
OTHER RETURN('0'B);
END;
END LEAPYEAR;
D) LEAPYEAR: PROC(YEAR) RETURNS(BIT(1));
DCL YEAR PlC '9999';
DCL (MOD,VERIFY) BUILTIN;
SELECT;
WHEN (VERIFY(YEAR,'0l23456789') ^= 0) RETURN('0'B);
WHEN (MOD(YEAR,100) = 0)RETURN('0'B);
WHEN (MOD(YEAR,4) = 0)RETURN('1'B);
OTHERRETURN('0'B);
END;
END LEAPYEAR;

2. 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) Check the CURRENT SQLI
B) Check the SQLCODE after each EXEC SQL OPEN / CLOSE statement.
C) Set the EOF bit to '1'B, if SQLCODE = 100 (not found).
D) Check the SQLCODE after each EXEC SQL FETCH statement.

3. What could be used when a structure is passed to a subroutine to verify that the area the structure
occupies in storage has not been overwritten?

A) Structure is passed as a pointer.
B) Structure has eyecatchers at start and at end.
C) Structure has a length field at start.
D) Structure is passed as an aggregate.

4. Which of the following is LEAST likely to be performed by a batch program?

A) Sorting
B) Production of pay checks
C) User interaction
D) Sequential file processing

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

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

Solutions: