DBMS Keys MCQs with Answers PDF Download – Test 302

MCQ 1506: To denote a candidate key as the principal means of identifying tuples within a relation, is known to be:

1. Super key
2. Unique key
3. Primary key
4. Superset key

MCQ 1507: In the model-view-controller (MVC) architecture, the view corresponds to the:

1. Interface layer
2. Data-access layer
3. Domain object layer
4. Business-logic layer

MCQ 1508: At the physical level a record can be described as a:

1. bit
2. Byte
3. Block
4. Data type

MCQ 1509: The values of the variables in a program at a point in time correspond to an:

1. Instance of schema
2. Block of schema
3. Point in schema
4. Boundary of schema

MCQ 1510: The join operation that takes all tuples in left relation that is not matching with any tuple in the right relation, is called:

1. Right outer join
2. Full outer join
3. Left outer join
4. Natural outer join