Domain Relational Calculus Quiz Questions and Answers PDF - 13

MCQ 61: A second form of relational calculus, is known as

1. Domain relational calculus
2. Relational calculus
3. Tuple relational calculus
4. Attribute relational calculus

MCQ 62: The solution to improving reliability is to introduce

1. Repositioning
2. Reflectivity
3. Transitivity
4. Redundancy

MCQ 63: Algebraic operation that outputs specified attributes from all rows of the input relation, is said to be

1. Natural join
2. Union operation
3. Projection
4. Selection

MCQ 64: The interface ResultSet has a method, getMetaData(), that returns a/an

1. Tuple
2. Value
3. Object
4. Result

MCQ 65: A method that uses two independent pieces/processes of information to identify a user is known as

1. Authentication through encryption
2. Password-method authentication
3. Two-method authentication
4. Two-factor authentication