In Unified Modeling Language (UML)primary Keys Cannot by NULL

question 4

True/False

In Unified Modeling Language (UML)primary keys cannot by NULL.

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Definitions:

Lighted Gas Stoves

Gas stoves that are ignited and in operation, producing a flame for cooking or heating purposes.

Slight Burn

A minor injury to skin caused by heat, electricity, chemicals, light, radiation, or friction.

Higher-order Conditioning

A conditioned response is linked to a new stimulus by associating the new stimulus with a previously conditioned stimulus.

Conditioned Stimulus

A previously neutral stimulus that, after association with an unconditioned stimulus, comes to trigger a conditioned response.