Introduction to Database System A ternary relationship is so called because in contains two entities and one association between them. True False True False ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System A key: identifies a row. can only be one column. identifies a column. must always be composed of two or more columns. identifies a row. can only be one column. identifies a column. must always be composed of two or more columns. ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System Which type of entity is related to two or more associated entities that each contain specialized attributes that apply to some but not all of the instances of the entity? Supertype entity Instance entity Subtype entity Archetype entity Supertype entity Instance entity Subtype entity Archetype entity ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System A race condition occurs when Both of the listed here two users of the DBMS are interacting with different files at the same time Two concurrent activities interact to cause a processing error None of the listed here Both of the listed here two users of the DBMS are interacting with different files at the same time Two concurrent activities interact to cause a processing error None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System In SQL, which command(s) is(are) used to enable/disable a database trigger? MODIFY USER ALTER TRIGGER CHANGE USER All of the listed here MODIFY USER ALTER TRIGGER CHANGE USER All of the listed here ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System Which type of entity cannot exist in the database unless another type of entity also exists in the database, but does not require that the identifier of that other entity be included as part of its own identifier? Weak entity ID-dependent entity Strong entity ID- independent entity Weak entity ID-dependent entity Strong entity ID- independent entity ANSWER DOWNLOAD EXAMIANS APP
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