Programming Fundamentals

In VB.NET, interrogative methods (methods that return a value) are implemented using the Function keyword. Sub is for procedures that don't return values. New is for instantiation.

Black box testing is a software testing method where the internal structure, design, and implementation of the item being tested are not known to the tester. It focuses entirely on the inputs provided and the resulting outputs.

A standard explicit cursor lifecycle in PL/SQL involves opening the cursor, fetching the rows into variables within a loop, and closing the cursor. The correct option accurately reflects this sequence.

The %FOUND cursor attribute returns a BOOLEAN value (TRUE if a row was fetched, FALSE otherwise). It's a boolean indicator, not a number or string.

In PL/SQL and most stored procedure languages, there are three parameter modes: IN (input only), OUT (output only), and INOUT (bidirectional). These allow procedures to receive values, return values, or both. OUTIN is not a standard parameter mode.

The default parameter mode in PL/SQL and similar languages is IN, meaning parameters are input-only by default. If you want a parameter to return values, you must explicitly specify OUT or INOUT. This default behavior prevents unintended modifications of parameter values.

In REXX, the CALL instruction is used to transfer control to an internal, external, or built-in subroutine. ITERATE and LEAVE control loops, while INTERPRET dynamically executes a string as a statement.

INTERPRET evaluates and executes REXX code contained in a string variable at runtime. EXECUTE is not a standard REXX keyword, RUN is for TSO commands, and CALL invokes subroutines.

RESULT is the special variable in REXX that receives the return value from a subroutine called with CALL. RC holds the return code from commands, while RETVAL and RV are not standard REXX variables.

The data stack queued via PUSH QUEUE serves as the buffer for EXECIO DISKW operations when writing to files. QUEUE only adds to the stack, compound and symbolic variables are memory structures not directly involved in file I/O.

PROCEDURE marks the start of a subroutine and ensures all variables within it are local to that routine unless exposed on the PROCEDURE statement. Without it, variables would be global across the entire exec.

Every executable PL I program requires a PROCEDURE statement with OPTIONS MAIN to start and an END to terminate. Code is written in columns 2 72, variables need not always be declared due to default typing, and while procedures can contain internal procedures, the main program structure is what option A describes.

To repeat an instruction 5 times in PL/I, the programmer can use a loop construct.

Option A is not a valid PL/I syntax.

Option B is a correct way to repeat an instruction 5 times in PL/I. It uses a DO loop with a loop control variable J that iterates from 1 to 5, executing the instruction each time.

Option C is also a valid way to repeat an instruction 5 times in PL/I, but it uses a WHILE loop instead of a DO loop. It initializes a counter variable to 1 and repeats the instruction while the counter is less than 5.

Option D is also a valid way to repeat an instruction 5 times in PL/I, but it uses a REPEAT loop with a loop control variable COUNTER that iterates from 1 to 5, executing the instruction each time.

Therefore, the correct answer is:

The Answer is: B

MYPROG calls INIT which executes A, B, then READ X which executes X, then instruction Z, then TERM which executes G, H, then instruction Z again. LOOP is defined but never called, so E and F never execute.