Statistical Analysis System (SAS) Programming Certification Practice Exam

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Which set of statements is equivalent to the provided conditional code?

if code='1' then Type='Fixed'; else if code='2' then Type='Variable'; else Type='Unknown';
if code='1' then Type='Fixed'; if code='2' then Type='Variable'; else Type='Unknown';
if code='1' then type='Fixed'; else code='2' and type='Variable'; else type='Unknown';
if code='1' and type='Fixed'; then code='2' and type='Variable'; else type='Unknown';

The correct answer is: if code='1' then Type='Fixed'; else if code='2' then Type='Variable'; else Type='Unknown';

The chosen set of statements accurately represents the structure of the conditional logic needed to assign the variable 'Type' based on the value of 'code'. This implies a sequential evaluation of conditions where the program checks if 'code' is equal to '1' first, and if so, it assigns 'Fixed' to 'Type'. If 'code' is not '1', the next condition checks whether 'code' is equal to '2'. If this condition is met, it assigns 'Variable' to 'Type'. If neither condition is satisfied, it defaults to assigning 'Unknown' to 'Type'. This logical flow is crucial because it effectively manages the possible values of 'code' and ensures that all potential cases are covered systematically. The use of "else if" correctly indicates that only one of the assignments will take place in a mutually exclusive manner, which is essential for maintaining the integrity of the 'Type' variable. In contrast, other choices either do not properly structure the conditions or could lead to ambiguous or unintended results. For example, in the other choices, the conditions might not represent the intended logic accurately, which can lead to misassignments or errors in the value of 'Type'.