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IBM Developing with IBM Enterprise PL/I Sample Questions:

1. Given the following pseudocode example, at which label should an unconditional COMMIT be placed
assuming there is a one-to-many relationship between FIL01 and FIL02 and FlL01 contains several
thousand records?
Read record from file FIL01
1 . DO while there are records in FIL01 IF record in FIL01 specifies update THEN DO for all records
matching in FIL02 Update record in FIL02 with information from FIL01 end DO
2 . end IF
3 . Read next record in FIL01
4 . end DO

A) 1
B) 2
C) 4
D) 3

2. 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,'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;
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 '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;

3. Given the following declarations, which code is likely to perform best and correctly initialize structure 3?
DCL 1 S UNALIGNED, 2 A CHAR(3), 2 B BIN FIXED(31), 2 C DEC FIXED(5); DCL 1 T UNALIGNED
LIKE S; T = ";

A) S = T,BY NAME;
B) S = ";
C) CALL PLIFILL(ADDR(S),'',STG(S));
D) CALL PLIMOVE(ADDR(S),ADDR(T),STG(S));

4. Which of the following runtime options should be reviewed when attempting to improve performance in a
PL/I program?

A) DEPTCONDLMT, INFOMSGFILTER, MSGFILE and RPTOPTS
B) ERRCOUNT, LIBSTACK, HEAPPOOLS and XPLINK
C) TRACE, TRAP, CHECK and DEBUG
D) ALL31, STORAGE, HEAP and STACK

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

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

Solutions: