Database Systems Practice Test 120
View of Data Multiple Choice Questions (MCQs) PDF Download - 120
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The View of Data MCQ with Answers PDF (View of Data Multiple Choice Questions (MCQs) PDF e-Book) download Ch. 13-120 to prepare Database Systems Practice Tests. Learn Introduction to DBMS Test PDF, View of Data Multiple Choice Questions (MCQ Quiz) for online bachelor's degree computer science. The View of Data MCQ App Download: Free certification app for relational algebra, sql data types and schemas, view of data test prep for software engineering degree programs.
The MCQ Quiz: The abstraction level that describes complex low-level data structures in detail, is; "View of Data" App (Play Store & App Store) with answers: View level; Physical level; Virtual level; Logical level; for online bachelor's degree computer science. Practice Introduction to DBMS Questions and Answers, Apple Book to download free sample for online college courses.
View of Data MCQ Quiz with Answers PDF Download: Test 120
The abstraction level that describes complex low-level data structures in detail, is
- Physical level
- View level
- Virtual level
- Logical level
The third level of abstraction, that simplifies the user interaction to the system is
- Virtual level
- Physical level
- Logical level
- View level
An index on an attribute of a relation is a data structure that allows database system to find tuples in relation that have specified value for attribute
- Efficiently
- Inefficiently
- Costly
- Optimized
The expression r -s represents a
- Arity
- Unity
- Projection
- Set-difference
Declarative DMLS requires a user to specify what data are needed and
- Specifying how to get data
- Provides data model
- Provides Schema
- Not specifying to get data
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