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In Chen’s ERD, what “rectangle” symbol represents?
In Chen’s ERD, what “rectangle” symbol represents? A. Attribute B. Entity C. Relationship D. None correct Answer: Option C
KB Cambodia
In DB, how to connect a relationship Table1 M-M Table2?
In DB, how to connect a relationship Table1 M-M Table2? A. Connect from Table1’s primary key to Table2’s foreign key B. Connect from Table2’s primary key to Table1’s foreign key C. Connect from both Table1′ PK and Table2’s PK to…
In DB, how to connect a relationship of Table1 M-1 Table2?
In DB, how to connect a relationship of Table1 M-1 Table2? A. Connect from Table1’s primary key to Table2’s foreign key B. Connect from Table2’s primary key to Table1’s foreign key C. Connect from both Table1′ PK and Table2’s PK…
In DB, how to connect a relationship of Table1 1-M Table2?
In DB, how to connect a relationship of Table1 1-M Table2? A. Connect from Table1’s primary key to Table2’s foreign key B. Connect from Table2’s primary key to Table1’s foreign key C. Connect from both Table1′ PK and Table2’s PK…
In DB, what is a relationship cardinality?
In DB, what is a relationship cardinality? A. 1-1, 1-M, M-1, and M-M B. Normalization C. Database design D. None correct Answer: Option A
In DB, what is the main purpose of having a foreign key?
In DB, what is the main purpose of having a foreign key? A. To make its data unique B. To connect it to a primary key C. To make its data unchangeable D. None correct Answer: Option B
In DB, what is correct characteristic of a foreign key?
In DB, what is correct characteristic of a foreign key? A. Preserves the referential integrity constraint B. Unique like a primary key C. Unchanged like a primary D. All correct Answer: Option A
In DB, which characteristic belongs to a primary key?
In DB, which characteristic belongs to a primary key? A. Unique B. Changeable C. Nullable D. All correct Answer: Option A
In DB, which characteristic does not belong to a primary key?
In DB, which characteristic does not belong to a primary key? A. Unique B. Unchanged C. Nullable D. None correct Answer: Option C
In DB, what is a derived attribute?
In DB, what is a derived attribute? A. It is similar to a composite attribute B. It is similar to a multi-valued attribute C. Its data comes from another attribute D. All correct Answer: Option C