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Relational Operations Quizzes Online MCQs p. 320

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Relational Operations Questions and Answers

1.

Languages based on the relational algebra, add a number of useful syntactic features, such as in

JAVA
XML
SQL
DB2

2.

Secondary indices improve the performance of

Queries without keys
Queries without search keys
Queries with keys
Queries with search keys

3.

To extract records from, and add records to the appropriate files to the database system, it needs

Different application programs
Similar application programs
Different application systems
Similar application systems

4.

The point in the schedule where the transaction obtains its ?nal lock, is called its

Shrinking point
Growing point
Lock point
Phase point

5.

Implementation of the simple structures at the logical level may involve complex

Physical-level structures
Logical-level structures
View-level Structures
Virtual-level Structures