An Index Created to Support a ____ Constraint Does Not

question 54

Multiple Choice

An index created to support a ____ constraint does not allow any null values in any of the indexed columns,because there is an automatic NOT NULL constraint added to a primary key column.

• A) PRIMARY KEY
• B) FOREIGN KEY
• C) UNIQUE
• D) CHECK

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Definitions:

Cell

The smallest structural and functional unit of an organism, typically microscopic and consisting of cytoplasm and a nucleus enclosed in a membrane.

44 Chromosomes

An atypical number of chromosomes in humans, which usually have 46. This condition can lead to certain genetic disorders or syndromes.

Chromosomal Pairs

The sets of two chromosomes in each cell of an organism, with one inherited from each parent, crucial for genetic traits and reproductive processes.

Chromosomes

Thread-like structures located inside the nucleus of animal and plant cells, made of protein and a single molecule of DNA, carrying genetic information.