Distributed Databases Systems

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What is the relational model in a distributed database system?

A collection of tables with different columns and rows

An instance of tables with columns representing different domains

A time-varying set of ntuples with values from various domains

A finite set of n-tuples with defined attributes over distinct domains (correct)

What does Database Integration involve in a distributed database system?

Separating data across multiple databases for security purposes

Creating duplicate copies of data for backup purposes

Combining data from different databases into a single logical view (correct)

Ensuring data consistency within a single database only

What is the purpose of Semantic Data Control in a distributed database system?

Replicating data across multiple servers for faster access

Enforcing constraints and rules to ensure data consistency and integrity (correct)

Encrypting all data to prevent unauthorized access

Creating different views of the same data for different user roles

In Distributed Query Processing, what is the main challenge faced by the system?

Coordinating queries that involve multiple databases and sites (A) Signup and view all the answers

What is the primary function of Data Replication in a distributed database system?

Creating and maintaining duplicate copies of data across multiple sites (B) Signup and view all the answers

What is a key feature of Parallel Database Systems in a distributed environment?

Processing queries concurrently to improve performance (B) Signup and view all the answers

What is the typical distance range for nodes in a Wide Area Network (WAN)?

Up to thousands of kilometers (B) Signup and view all the answers

Which network type is known for having limited geographic scope?

Local Area Network (LAN) (A) Signup and view all the answers

What type of network topology exhibits regularity in interconnections?

Bus (C) Signup and view all the answers

Which medium access method is typically used in a Bus network?

Carrier Sense Multiple Access with Collision Detection (CSMA/CD) (D) Signup and view all the answers

In which type of network would you likely encounter speeds ranging from 150Mbps to 10Gbps?

Wide Area Network (WAN) (D) Signup and view all the answers

What is the main purpose of normalization in database design?

To have each relation contain an independent set of facts (D) Signup and view all the answers

Which normal form focuses on atomic values?

1NF (A) Signup and view all the answers

In distributed database design, what does BCNF stand for?

Boyce-Codd Normal Form (B) Signup and view all the answers

What is the top-down methodology used in normalization known for?

Producing a schema through refinements and decompositions (B) Signup and view all the answers

What characteristic should decomposed schemas follow to preserve the semantics of the original schema?

Maintain the relationships and meanings of the original schema (B) Signup and view all the answers

What is the process of concept separation applied in normalization known as?

Normalization (A) Signup and view all the answers

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