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IBM C9050-042 Exam Syllabus Topics:

IBM Developing with IBM Enterprise PL/I Sample Questions:

1. How much storage in bytes will be allocated for the following declaration?
DCL 1 S(10) ALIGNED,
2 A BIN FIXED(15),
2 B DEC FIXED(3),
2 C CHAP(3);

A) 80
B) 69
C) 70
D) 79

2. Given the following example, what will happen with the PUT SKIP DATA statement after the DO-loop?
PGM_A PROC OPTIONS(MAIN); DCL I FIXED SIN(31);
DCL MON CHAR (10);
DCL DAY(12) CHAP (2) INIT ('31','28','31', '30','31','30' 31','31','30' '31','30','31');
DO I = 1 TO 12;
MON = MON_FUNC(I);
PUT DATA (MON,DAY(I));
END;
PUT SKIP DATA (MON_ARR);
MON_FUNC: PROC(INP) RETURNS(CHAP(10));
DCL INP FIXED BIN (31);
DCL MON_APP(12) CHAR (10) INIT ('JANUARY ','FEBRUARY ','MARCH ', 'APRIL ','MAY
"JUNE 'JULY ''AUGUST ''SEPTEMBER','OCTOBER ','NOVEMBER ','DECEMBER ');
RETURN(MON_ARR(INP));
END;
END;

A) Twelve zeroes will be printed.
B) The compiler will issue no messages but the program will tail trying to execute the statement.
C) The compiler will issue a message for the statement and results are unpredictable.
D) A table of the months of theyearwill be printed.

3. Which of the following is a typical deadlock situation?
Situation 1:
Transaction A waiting for resource_2 and Transaction B waiting for resource_1 while resource_1 is held
by Transaction C and resource_2 is held by Transaction B
Situation 2:
Transaction A waiting for resource_1 and Transaction B waiting for resource_2 while resource_1 is held
by Transaction B and resource_2 is held by Transaction C
Situation 3:
Transaction A Waiting for resource_2, Transaction B waiting for resource_3, Transaction C waiting for
resource_1 ,while resource_1 ,resource_2 and resource_3 are held by Transactions A, B and C
respectively.
Situation 4:
Transaction B waiting for resource_1 and Transaction C waiting for resource 2 while resource_1 is held
by Transaction C and resource_2 is held by Transaction A

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

4. Which of the following techniques, if any, can be used to parallelize a PL/I program?

A) Attach threads to pieces or work that are independent from othersB.Attach a thread to every subroutine
in the program.
B) Attach a thread to every external entry in the program.
C) Parallelization is not possible in PL/I program.

5. Prerequisite:
A sorted input dataset with record length 100 contains at least one record for all 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 program must not read more records.
4 .) The program must not abend or loop infinitely.
If the following code does not fulfill the requirements above, which would be the reason, if any?
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);
IF EOF_IN THEN LEAVE;
SELECT(INSTRUC .A);
WHEN('1') DO;
Z1 += Z1;
ITERATE LAB;
END;
WHEN('3') DO;
Z3 = Z3 + 1;
LEAVE;
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*/
END;/*LOOP*/

A) The code does not fulfill the requirement, because not all records with '2' in the first byte will be written
to the output dataset.
B) The code does not fulfill the requirement, because the program will loop infinitely.
C) The code fulfills the requirement.
D) The code does not fulfill the requirement, because the READ iteration will not be left when the first
record with '3' in the first byte appears.

Solutions: