What is an Entity? — Learn free

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Questions 1–10 of 10

1. In data modelling, what is an entity?
Question 1A. A column in a spreadsheetB. Anything that can be uniquely identified and describedC. A database serverD. A calculation performed on dataE. A report for management
2. Which three components is an entity broken into in data modelling?
Question 2A. Table, index and viewB. Entity type, entity attribute and entity instanceC. Schema, query and resultD. Object, class and methodE. Key, value and pair
3. What does an Entity Type contain?
Question 3A. The actual data of every recordB. Only one recordC. The structure and attributes of a category, but no actual dataD. A single attribute valueE. The physical storage location of data
4. In a relational database, an Entity Type maps directly to which structure?
Question 4A. A rowB. A columnC. A tableD. An indexE. A stored procedure
5. An Entity Attribute maps to which structure in a relational database table?
Question 5A. A rowB. A column or fieldC. A whole tableD. A foreign databaseE. A backup
6. Which is an example of a COMPOSITE attribute?
Question 6A. AgeB. Date of BirthC. Full Name, which breaks down into First Name and Last NameD. ISBNE. Publication Year
7. Age calculated from Date of Birth is an example of which attribute type?
Question 7A. Key attributeB. Multi-valued attributeC. Composite attributeD. Derived attributeE. Simple attribute
8. Which attribute type uniquely identifies an entity instance?
Question 8A. Key attribute, such as an ISBN for a bookB. Derived attributeC. Multi-valued attributeD. Composite attributeE. Descriptive attribute
9. Phone Numbers, where one person may have several, is an example of which attribute type?
Question 9A. Single-valuedB. Multi-valuedC. DerivedD. KeyE. Composite
10. The specific book "I Am Data!" with its title, author, ISBN and year is an example of what?
Question 10A. An entity typeB. An entity attributeC. An entity instanceD. A database schemaE. A composite key