Database Test 2 Computer Subject
Database Test 2 Computer Subject
Question 41
An entity related to itself in an ERD model refers to?
A recursive relationship occurs when an entity is related to itself.
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Question 42
A data model is _____?
A data model represents the logical structure, can be diagrammed, and can be transformed into database tables.
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Question 43
Which of the following indicates the maximum number of entities that can be involved in a relationship?
Maximum cardinality specifies the upper limit of entity instances in a relationship.
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Question 44
Which of the following refers to an entity that logically depends on another entity?
A weak entity cannot exist independently and relies on a strong entity for identification.
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Question 45
In an ER diagram a rectangle represents?
In an ER diagram, a rectangle represents an entity class or a strong entity.
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Which of the following is NOT typically considered a specific characteristic or demographic element of duodenal ulcers?
Hussaina Enterprises sent goods worth #800,000 at cost plus mark-up of 20% to its branch. Determine the profit on the goods sent to the branch at profit margin of 25% mark-up.
Use the following extract and information:
Subscription received in cash (1999): ₦7,500
Subscription received in cash (2000): ₦1,000
Subscription in arrears (1/1/99): ₦700
Subscription in arrears (31/12/99): ₦600
Calculate the subscriptions to be credited to the Income and Expenditure account for 1999.
n monosaccharide ⇌ PQ polysaccharide − n water.
In the process above, P and Q respectively represent