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Database Management System Practice Test 94

# Query Trees Notations MCQ (Multiple Choice Questions) PDF - 94

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## Query Trees Notations Questions and Answers : Quiz 94

MCQ 466: The data structure in the form of tree to correspond to relational algebra expression is classified as

1. relation tree
2. attribute tree
3. entity tree
4. query tree

MCQ 467: The types of relational calculi includes

1. domain calculus
2. nodes calculus
3. tuple calculus
4. both a and c

MCQ 468: In database management system, the current set of instance or database snapshot is also called

1. mathematical operators of schema
2. logical operators of schema
3. extension of schema
4. intension of schema

MCQ 469: The elements included in state chart diagrams are

1. transitions
2. condition markers
3. iteration markers
4. lifeline markers

MCQ 470: In Three-Schema Architecture, the schema in which the part of database is described to the user group who is interested and other details are kept hide is called

1. logical schema
2. conceptual schema
3. internal schema
4. external schema

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