Indicate what is not correct in a REXX program.
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A REXX clause can be coded in uppercase, lowercase or mixed case.
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Multiple instructions can be coded on 1 line, as long as they are separated by a ','
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A REXX program should start with a comment clause /* REXX */
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Continuation of REXX instructions is achieved by using a ',' as a continuation indicator
In REXX, multiple instructions on one line must be separated by semicolons (;), not commas. Options A and C are correct statements (case-insensitive coding, comment requirement). Option D is also correct - commas are used for continuation, though typically at the end of lines, not as separators.
To answer this question, let's go through each option to understand why it is correct or incorrect:
Option A) A REXX clause can be coded in uppercase, lowercase, or mixed case. - This option is correct. In REXX, you can write code in uppercase, lowercase, or mixed case. The language is case-insensitive.
Option B) Multiple instructions can be coded on 1 line, as long as they are separated by a ',' - This option is incorrect. In REXX, multiple instructions cannot be coded on a single line by separating them with a ','. Each instruction should be written on a separate line.
Option C) A REXX program should start with a comment clause /* REXX / - This option is correct. It is a good practice to start a REXX program with a comment clause / REXX */ to indicate that it is a REXX program.
Option D) Continuation of REXX instructions is achieved by using a ',' as a continuation indicator - This option is correct. In REXX, you can use a ',' as a continuation indicator to continue a statement onto the next line.
The correct answer is B. Multiple instructions cannot be coded on 1 line, as long as they are separated by a ','. This statement is not correct in a REXX program.