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IBM Developing with IBM Enterprise PL/I Sample Questions:

1. What would the attribute table in a compile list be used for when looking at the variable in a dump?

A) Find hex offset of variable
B) Find name of variable
C) Find where variable is used
D) Find variable attributes

2. Assuming there is no information about the duration or each table update and the programs are running in
a multitasking environment, which of the following options will best minimize the chance for deadlocks?

A) Program A updates Table A, Table B and Table C in the specified order, and Program B updates Table
C, Table B and Table A in the specified order.
B) Programs update table A, Table B and Table C in random order.
C) All programs update Table A, Table B and Table C in the same order.
D) Program A updates Table A, Table B and Table C in the specified order, and Program B updates Table
B, Table C and Table A in the specified order.

3. Which of the following will definitely NOT cause an unresolved external entry?

A) The main procedure name matching the binder or load module 'name'
B) An incorrect DECLARE for the external entry
C) A mismatch in names between the CALL and the actual procedure
D) Missing library at link time

4. Which of the following structures will NOT contain padding btes if the PL/I default for alignment is applied?

A) DCL 1 A,
2 B FIXED BIN(31),
2 C CHAR (2) VAR,
2 D FIXED BIN(31),
2 E FIXED DEC (1),
2 F FLOAT DEC (6);
B) DCL 1 A,
2 B FIXED BIN(31),
2 C CHAR (2) VAR ALIGNED,
2 D FIXED BIN(31),
2 E FIXED DEC (1),
2 F CHAR (3) YAP;
C) DCL 1 A,
2 B FIXED BIN(31),
2 C CHAR (2) VAP,
2 D FIXED BIN(31),
2 E FIXED DEC (1),
2 F CHAR (3) VAR ALIGNED;
D) DCL 1 A ALIGNED,
2 B FIXED BIN(31),
2 C CHAR (2) VAR,
2 D FIXED BIN(31),
2 E FIXED DEC (1),
2 F CHAR (3) VAR,

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

Solutions: