Data Abstraction Notes Questions with Answers PDF Download – Test 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