A Rule of Thumb for Choosing Indexes Is To

question 39

Multiple Choice

A rule of thumb for choosing indexes is to:

• A) be careful indexing attributes that may be null.
• B) index each primary key of each table.
• C) use an index when there is variety in attribute values.
• D) all of the above.

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Definitions:

Secondary Circular Reactions

Repetitive actions oriented around external objects, typically observed in infants from 4 to 8 months as part of Piaget's sensorimotor stage.

Sensorimotor Thought

describes the stage in early childhood cognitive development where thinking is based primarily on physical actions and sensory experiences.

Tertiary Circular Reactions

Advanced exploratory behaviors observed in infants around 12 to 18 months, involving experimentation to explore the properties of objects and the outcomes of actions.

First Habits

The initial routines or behaviors that an individual forms, often early in life, which can set the foundation for later habits.