Multiple choice technology mainframe

Which of the following conditional expressions can not be used with an IF-THEN-ELSE-ENDIF construction?

  1. STEP.RC NE 8

  2. ABEND = FALSE

  3. STEP.CC = U4038

  4. STEP.RUN EQ TRUE
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The correct answer is C because STEP.CC = U4038 is invalid syntax. In JCL conditional expressions, completion codes (CC) must be numeric values, not alphanumeric strings like 'U4038'. The other options use valid formats: STEP.RC (return code), ABEND (abnormal termination flag), and STEP.RUN with boolean operators.

AI explanation

To answer this question, we need to understand the syntax and rules of using conditional expressions with an IF-THEN-ELSE-ENDIF construction.

The IF-THEN-ELSE-ENDIF construction is used in programming languages to make decisions based on a condition. It follows the syntax:

IF condition THEN statement(s) ELSE statement(s) ENDIF

The condition in the IF statement is a conditional expression that evaluates to either true or false.

Let's go through each option to understand why it can or cannot be used with an IF-THEN-ELSE-ENDIF construction:

A. STEP.RC NE 8 - This option can be used with an IF-THEN-ELSE-ENDIF construction because it is a valid conditional expression. It checks if the value of the STEP.RC variable is not equal to 8.

B. ABEND = FALSE - This option can be used with an IF-THEN-ELSE-ENDIF construction because it is a valid conditional expression. It checks if the value of the ABEND variable is equal to false.

C. STEP.CC = U4038 - This option cannot be used with an IF-THEN-ELSE-ENDIF construction because it is missing the comparison operator. The correct syntax for this condition would be STEP.CC EQ U4038. Therefore, this option is incorrect.

D. STEP.RUN EQ TRUE - This option can be used with an IF-THEN-ELSE-ENDIF construction because it is a valid conditional expression. It checks if the value of the STEP.RUN variable is equal to true.

The correct answer is C. STEP.CC = U4038. This option is incorrect because it is missing the comparison operator.

Therefore, the conditional expression that cannot be used with an IF-THEN-ELSE-ENDIF construction is C. STEP.CC = U4038.

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