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Define the term- Actors and Data Stores
Actors: An actor is the active object which drives data flow graph by producing or consuming values. Actors are attached to inputs and outputs of the data flow graph.
Data Stores: A data store is passive object within the data flow diagram which stores data for later access. A data store permits values to be accessed in the different order than they are generated.
What are the two types of blocks in the fixed -length representation? Define them. Anchor block: Have the first record of a chain. Overflow block: Have the records other tha
1. Which model is used to store data in tree structures Ans: Hierarchical model is used to store data in tree structures
Question 1 Draw a Data Flow Diagram for a University scenario Question 2 Discuss the following with suitable examples Relational Algebra Operators Database Pla
In which form of relational database developer refers to a record? In a tuple form of relational database developer refers to a record.
Where does view definition stored? A view definition is permanently stored as part of the database.
Explain Foreign Key? Foreign Key - Let there are two relations (tables) R and S. Any candidate key of the relation R that is referred within the relation S is known as the fo
What is trigger Triggers are statements that are implemented automatically by the system as the side effect of a change to the database.
Question 1 Create a table student with attributes student name, roll number, total marks and percentage. Do the following operations Insert details in to the table Update
For the relations R and S given below: R S A B C 1 4 7 2 5 8 3 6 9
What are the two approaches to store relations in distributed database? a) Replication b) Fragmentation
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