IS411P Distributed Database Systems Quiz

Play an AI-generated podcast conversation about this lesson

What is the primary purpose of data replication in a distributed database system?

To increase the complexity of the distributed database design

To eliminate query processing and optimization issues

To centralize data access points and improve response time

To remove single points of failure and improve system availability (correct)

How does data replication contribute to performance improvement in distributed databases?

By adding complexity to query processing and optimization

By centralizing the data access points

By maintaining only one copy of each data item

By localizing most of the access, which reduces response time (correct)

What is one of the challenges posed by data replication in distributed database systems?

Reduced system availability

Keeping different copies synchronized (correct)

Increased response time

Decreased scalability

What is the execution model for replicated data items in a distributed database system?

Each data item has multiple physical copies but only one logical copy Signup and view all the answers

What is the purpose of having multiple copies of data items as part of their operational specifications?

To meet application requirements dictated by the applications Signup and view all the answers

What are the key benefits of data replication in a distributed database system?

Improving system availability, performance, and scalability Signup and view all the answers

In a replicated database, what is the responsibility of the replica control protocol?

Mapping read and write operations to logical data items Signup and view all the answers

What does one-copy equivalence (single system image) refer to in a replicated database?

Treating the system as if there is a single copy of each data item Signup and view all the answers

What characterizes a partially replicated database?

Some data items may be non-replicated and the number of physical data items for each logical data item may vary Signup and view all the answers

What does strong consistency criteria ensure in a replicated database?

All replicas of each data item have identical values Signup and view all the answers

In a replicated database, what characterizes centralized update techniques?

Performing updates first on a master copy Signup and view all the answers

What is the responsibility of the update propagation decision in a replicated database?

Deciding how updates are distributed among replicas Signup and view all the answers

What is the impact of a mutually consistent state in a replicated database?

All replicas of each data item have identical values Signup and view all the answers

What types of transactions are considered global in a partially replicated database?

Transactions accessing only non-replicated data items Signup and view all the answers

What does the degree of replication transparency refer to in a replicated database?

Translating logical operations to operate on physical objects Signup and view all the answers

What are the techniques characterized as distributed update techniques in a replicated database?

Allowing updates over any replica Signup and view all the answers

IS411P Distributed Database Systems Quiz

Choose a study mode

Podcast

Questions and Answers