Database Systems MCQs - Chapter 14
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Introduction to RDBMS Test Questions and Answers PDF Download: MCQ 4
In the relational model, the column of the table is known to be
- Entity field
- Attribute
- Tuple
- Relation
The contents of a relation instance may change with time as the relation
- Domain
- Time
- Updated
- Retrieved
The query languages are usually on a level higher than that of a standard
- Updation language
- Query program language
- Procedural language
- Programming language
Query languages used in practice includes
- Elements
- Fields
- Instances
- Tuples
A set of one or more attributes that collectively, allow us to identify uniquely a tuple in the relation, is known as
- Unique key
- Special key
- Super key
- Primary key
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- Package of software that facilitate modeling of database and improved performance of database system is classified as
- In database management systems, record which contains all data regarding tuples of database is called
- Type data abstraction which allows conceptual representation of data in database management system is considered as
- DIVISION operation can be applied to two relations A and B such as R(A) ÷ R(B) where as
- In categories of data modeling, low level data models are also called
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- An interface of transaction-processing systems to connect clients with a server is named as
- Data values stored in database must satisfy certain types of
- Preprocessor replaces embedded SQL requests with
- Durability can be ensured in different
- Language used for expression of database's queries and updates is known as