Which option demonstrates a normative conformed specification?

Which option demonstrates a normative conformed specification?

• A. Availability zone SHOULD be present
• B. The column MUST be type string
• C. Availability zone SHOULD be present the column MUST be type string and MAY contain null values
• D. MAY contain null values

Answer: (D)

In standards and specifications, normative conformance is conveyed through explicit obligation levels like MUST, SHOULD, and MAY. The clearest way to show a boundary that is part of the conformance contract is to state what is allowed or optional, using MAY. The option that MAY contain null values expresses a permission: it defines that nulls are allowed under the specification. It sets a defined, permissible condition without forcing data to be non-null. The other statements either require something (MUST), give a recommendation (SHOULD), or mix levels, which makes the conformance boundary less direct. So, stating that values MAY contain null values best demonstrates a normative conformed specification.

In standards and specifications, normative conformance is conveyed through explicit obligation levels like MUST, SHOULD, and MAY. The clearest way to show a boundary that is part of the conformance contract is to state what is allowed or optional, using MAY.

The option that MAY contain null values expresses a permission: it defines that nulls are allowed under the specification. It sets a defined, permissible condition without forcing data to be non-null. The other statements either require something (MUST), give a recommendation (SHOULD), or mix levels, which makes the conformance boundary less direct. So, stating that values MAY contain null values best demonstrates a normative conformed specification.