Data Abstraction Quiz PDF: Questions and Answers - 19

MCQ 91: Considering abstraction concepts, the process of assigning the similar entities to similar entity types systematically is called

1. classification
2. instantiation
3. identification
4. exception abstract

MCQ 92: In a relation schema, each key of schema having more than one key is classified as

1. candidate key
2. super key
3. simple key
4. parallel key

MCQ 93: The category which considers the subset of union of entities included in super class is classified

1. disjoint super class
2. joined super class
3. total super class
4. partial super class

MCQ 94: In a query tree, the operations of relational algebra are classified as

1. internal nodes
2. external nodes
3. theta nodes
4. entity nodes

MCQ 95: The kind of allocation in which the file blocks contain the pointer to the next blocks of file is classified as

1. linked allocation
2. indexed allocation
3. header allocation
4. contiguous allocation