IBM C6030-042 Online Practice Questions and Exam Preparation

IBM C6030-042 Online Questions & Answers

• Question 31:

  In a multithreading environment, when can a deadlock occur between two threads, if at all?

  A. When both access the same memory area
  B. When they are operating synchronously
  C. When they have both locked a resource that the other one requires
  D. It can neveroccur.
  C. When they have both locked a resource that the other one requires

• Question 32:

  The XMLCHAR builtin function provides the ability to do which of the following?

  A. Check XML for well-formedness
  B. Check XML for validity
  C. Create an XML buffer from a structure
  D. Read an XML file into a structure
  C. Create an XML buffer from a structure

• Question 33:

  What happens to STATIC variables declared in a procedure when the procedure is called recursively?

  A. STATIC variables are allocated only once and can, therefore, be used for communication between invocations.
  B. The values of STATIC variables from the previous invocation are saved and are available when the current invocation ends.
  C. The values of STATIC variables from the previous invocation are lost.
  D. STATIC variables are allocated and initialized at each new invocation.
  A. STATIC variables are allocated only once and can, therefore, be used for communication between invocations.

• Question 34:

  Requirement:

  All the characters of the CHAR(3) variable X must be tested to be numeric. Which of the following solutions meets the requirement and does not require essential structural modifications when the requirement is changed to the following: The first character of the CHAR(3) variable X must be tested to be uppercase alphabetic, while the two other characters must be tested to be numeric.

  A. IFX >= `000' and X
  B. DCL NUM CHAR(10) VALUE('0l 23456789');IF VERIFY(X,NUM) = 0THEN ... /*NUMERIC*/
  C. DCL Y PIC'999';DCL SWITCH BIT(1) INIT('1'B);ON CONVERSION BEGIN;SWITCH =ONSOURCE = `000';END;Y = X;IF SWITCHTHEN ... ; /*NUMERIC*/
  D. DCL ALPHA CHAR(26) VALUE('ABCDEFGHIJKLMNOPQRSTUVWXYZ');DCL NUM CHAR(10) VALUE('0123456789');IF TRANSLATE(X,(26)'A'!I(10)'9'ALPHA!!NUM) = `999'THEN ... ; /*NUMERIC*/
  D. DCL ALPHA CHAR(26) VALUE('ABCDEFGHIJKLMNOPQRSTUVWXYZ');DCL NUM CHAR(10) VALUE('0123456789');IF TRANSLATE(X,(26)'A'!I(10)'9'ALPHA!!NUM) = `999'THEN ... ; /*NUMERIC*/

• Question 35:

  A lead developer reviewing code from one of the programmers found the following code. What should the programmer be told about BY NAME assignments?

  DCLl STR1, 3FB15 FIXED BIN (15), 3 CH10 CHAR (10), 3 NAME CHAR (25). 3 ADDR CHAR (30), 3 FB31 FIXED BIN (31); DCL 1 STR2, 3 FB31 FIXED BIN (31), 3 FB31B FIXED BIN (31), 3 NAME CHAR (20), 3 ADDR CHAR (30), 3 CH20 CHAR (20); STR2 = STR1, BY NAME;

  A. There is nothing wrong with using BY NAME assignments in this situation.
  B. They are incorrect and should be replaced by individual assignments.
  C. They can have inadvertent side effects and the code should be analwed.
  D. They do not work in this case and the code should be replaced by individual assignments.
  C. They can have inadvertent side effects and the code should be analwed.

• Question 36:

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

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

• Question 37:

  Given the following code example, what is the value of A after the last CALL to ADD_RUT?

  PGM2: PROC OPTIONS(MAIN,REENTRANT) REORDER;

  DCL A BIN FIXED (15);

  A =1

  CALL ADD_RUT (A);

  CALL ADD_RUT (A);

  CALL ADD_RUT (A);

  ADD_RUT: PROC (VAL);

  DCL VAL DEC FIXED (15);

  VAL = VAL + 1;

  END ADD_RUT;

  END PGM2;

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

• Question 38:

  Which of the following is the most likely reason to use a debugger in a production environment?

  A. Enhance performance
  B. Ensure data integrity
  C. Investigate error situations
  D. Test a program
  C. Investigate error situations

• Question 39:

  Given the following (incomplete) code, how is Q to be declared in order to allocate X in A?

  DCL A AREA;

  DCL Q ...

  DCL X FIXED BIN (31) BASED (Q);

  ALLOCATE X;

  A. ... OFFSET(A);
  B. ... POINTER;
  C. ... OFFSET;
  D. ... BASED(A);
  A. ... OFFSET(A);

• Question 40:

  Which of the following is LEAST likely to be performed by an online application?

  A. Checkpoint/restart logic
  B. Transaction processing
  C. End user interaction
  D. Sorting
  A. Checkpoint/restart logic