Database Processing for BIS
Q. What is a primary key?
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A.
A unique identifier for a record
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B.
A foreign key reference
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C.
An index for faster searches
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D.
A type of relationship
Solution
A primary key is a unique identifier for a record in a database table, ensuring that no two records can have the same key value.
Correct Answer: A — A unique identifier for a record
Q. Which architecture is commonly used in modern DBMS?
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A.
Single-tier architecture
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B.
Two-tier architecture
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C.
Three-tier architecture
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D.
Four-tier architecture
Solution
The three-tier architecture is commonly used in modern DBMS, separating the user interface, application logic, and database management.
Correct Answer: C — Three-tier architecture
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