Database Test 2 Computer Subject
Database Test 2 Computer Subject
Question 11
The hierarchical database is very efficient when?
Hierarchical databases efficiently handle both small transaction volumes and large data sets due to its tree structure.
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Question 12
Which data model creates parent-child relationships between data elements and enables each child to have more than one parent?
The network model allows multiple parent relationships for a child node using a graph-like structure.
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Question 13
DBA stands for?
DBA is an abbreviation for Database Administrator, the professional responsible for managing databases.
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Question 14
Which of the following represents a collection of concepts that are used to describe the structure of a database?
A data model defines the concepts, relationships, and constraints used to describe database structure.
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Question 15
The relational model ________?
The relational model was proposed by E.F. Codd at IBM in 1970, forming the basis of modern relational databases.
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Question 16
Physical database design decisions must be made carefully because of impacts on?
Physical design affects response times, accessibility, and security of the database.
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Question 17
An advantage of partitioning is _______?
Partitioning improves efficiency by dividing data into manageable parts.
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Question 18
A disadvantage of partitioning is_______?
Partitioning may require extra storage space and increase update complexity.
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Question 19
Merge relation is important because_______?
Merging relations is necessary to integrate different user views and accommodate new data requirements.
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Question 20
Organizing the database in computer disk storage is done in________?
Physical design deals with storing and organizing database data on disk storage.
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