Extended ER Features MCQ (Multiple Choice Questions) PDF - 274

MCQ 1366: A subclass also inherits participation in the relationship sets in which its superclass is

1. Called
2. Invoked
3. Participating
4. Executing

MCQ 1367: A superkey may contain extraneous

1. Attributes
2. Keys
3. Instances
4. Entries

MCQ 1368: We can write 'relation A contains relation B' as

1. exists (B except A)
2. exists (A except B)
3. notexists (A except B)
4. notexists (B except A)

MCQ 1369: High throughput can be obtained by system component's

1. Low utilization
2. High utilization
3. Low responses
4. High responses

MCQ 1370: Any database modification that would cause a null to be inserted in an attribute declared to be not null generates an

1. Exception
2. Rejection
3. Output
4. Error