A composite primary key<span> is a set of several primary </span>keys<span> that, together, uniquely identifies each record.</span>
Primary keys are used as identifiers of composite entities. In this case each primary key combination is allowed only once in the *:* relationship.
Other case where primary keys are used is as identifiers of weak entities, where the weak entity has a strong identifying relationship with the parent entity.
Answer: D)The pattern of blood vessels at the back of the eye.
Explanation: The retinal scan is the techniques which is used in the bio-metric mechanism.The scanning of the retina's blood vessel pattern is capture by the scanner is the unique technique which is used for bio-metric purpose.
Blood vessel pattern is capture because it is present in unique form for every person and will help in distinguishing a person from another person while scanning.
Other options are incorrect because light reflection or reaching near retina and light pattern are not the unique way for identification while scanning a person.Thus the correct option is option(D).
Anwer is <u>True</u>
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You should definitely consider what kind of audience you are appealing to. For example, if you were running a business based on cosmetic products you may want to focus your website on self-care and makeup tips rather than something like cooking. By making your website direct about what you offer, the better the audience will understand. This will make your website succeed. Hope this helped :))
Answer:
The information technology (IT) sector includes companies that produce software, hardware, or semiconductor equipment, and companies that provide internet or related services.
Explanation:
