What is database replication?
A) Storing data redundantly in multiple databases
B) Encrypting database backups
C) Securing database connections
D) Managing access control for database objects
Answer: A
Which of the following is a benefit of database replication?
A) Increased data encryption
B) Enhanced query performance
C) Simplified query optimization
D) Improved data normalization
Answer: B
What is the primary goal of database replication?
A) Minimizing storage space requirements
B) Maximizing data redundancy
C) Improving data security through encryption
D) Enhancing data availability and reliability
Answer: D
Which type of database replication ensures that changes made in one database are reflected immediately in another database?
A) Asynchronous replication
B) Synchronous replication
C) Parallel replication
D) Distributed replication
Answer: B
What is asynchronous replication in database systems?
A) Replicating data in real-time across multiple databases
B) Delaying replication updates to improve performance
C) Encrypting data during replication
D) Managing access control for replicated data
Answer: B
Which of the following is a disadvantage of asynchronous replication?
A) Higher data consistency across databases
B) Potential data loss during failover scenarios
C) Increased network bandwidth utilization
D) Improved read scalability
Answer: B
What is synchronous replication in database systems?
A) Replicating data with delays to improve performance
B) Ensuring data consistency across multiple databases in real-time
C) Encrypting data during replication
D) Managing access control for replicated data
Answer: B
Which of the following is a benefit of synchronous replication?
A) Lower network bandwidth utilization
B) Delayed data consistency across databases
C) Higher read scalability
D) Improved performance during peak loads
Answer: A
What is the purpose of distributed replication in database systems?
A) Storing data redundantly in multiple databases
B) Replicating data across multiple geographically dispersed databases
C) Encrypting database backups
D) Managing access control for database objects
Answer: B
Which of the following is a consideration when implementing distributed replication?
A) Maximizing data encryption
B) Minimizing query complexity
C) Ensuring low latency across distributed databases
D) Securing database backups
Answer: C
What is data distribution in the context of database management?
A) Encrypting data during transmission
B) Storing data in multiple database tables
C) Replicating data across multiple databases
D) Managing access control for database objects
Answer: B
Which of the following is a benefit of data distribution?
A) Increased data redundancy
B) Improved query performance
C) Enhanced data security through encryption
D) Simplified data normalization
Answer: B
What is horizontal data distribution in database systems?
A) Storing data in separate tables for different users
B) Dividing large tables into smaller, manageable parts
C) Replicating data across multiple databases
D) Distributing rows of a table across multiple database nodes
Answer: D
Which of the following is a benefit of horizontal data distribution?
A) Simplified query optimization
B) Increased data redundancy
C) Improved data masking capabilities
D) Enhanced query performance
Answer: D
What is vertical data distribution in database systems?
A) Storing data in separate tables for different users
B) Dividing large tables into smaller, manageable parts
C) Replicating data across multiple databases
D) Splitting columns of a table across multiple database nodes
Answer: D
Which of the following is a benefit of vertical data distribution?
A) Simplified query optimization
B) Increased data redundancy
C) Improved data masking capabilities
D) Enhanced query performance
Answer: A
What is sharding in the context of database management?
A) Encrypting data during transmission
B) Distributing data across multiple database nodes
C) Replicating data across multiple databases
D) Managing access control for database objects
Answer: B
Which of the following is a benefit of database sharding?
A) Improved query complexity
B) Enhanced data redundancy
C) Increased data scalability and performance
D) Simplified data normalization
Answer: C
What is data locality in distributed databases?
A) Storing data in separate tables for different users
B) Ensuring data is stored near the location where it’s most frequently accessed
C) Replicating data across multiple databases
D) Managing access control for database objects
Answer: B
Which of the following is a benefit of data locality?
A) Simplified query optimization
B) Increased data redundancy
C) Improved data masking capabilities
D) Enhanced query performance
Answer: D
What is the purpose of data replication in distributed databases?
A) Storing data redundantly in multiple databases
B) Encrypting database backups
C) Securing database connections
D) Managing access control for database objects
Answer: A
Which of the following is a benefit of database replication?
A) Increased data encryption
B) Enhanced query performance
C) Simplified query optimization
D) Improved data normalization
Answer: B
What is the primary goal of database replication?
A) Minimizing storage space requirements
B) Maximizing data redundancy
C) Improving data security through encryption
D) Enhancing data availability and reliability
Answer: D
Which type of database replication ensures that changes made in one database are reflected immediately in another database?
A) Asynchronous replication
B) Synchronous replication
C) Parallel replication
D) Distributed replication
Answer: B
What is asynchronous replication in database systems?
A) Replicating data in real-time across multiple databases
B) Delaying replication updates to improve performance
C) Encrypting data during replication
D) Managing access control for replicated data
Answer: B
Which of the following is a disadvantage of asynchronous replication?
A) Higher data consistency across databases
B) Potential data loss during failover scenarios
C) Increased network bandwidth utilization
D) Improved read scalability
Answer: B
What is synchronous replication in database systems?
A) Replicating data with delays to improve performance
B) Ensuring data consistency across multiple databases in real-time
C) Encrypting data during replication
D) Managing access control for replicated data
Answer: B
Which of the following is a benefit of synchronous replication?
A) Lower network bandwidth utilization
B) Delayed data consistency across databases
C) Higher read scalability
D) Improved performance during peak loads
Answer: A
What is the purpose of distributed replication in database systems?
A) Storing data redundantly in multiple databases
B) Replicating data across multiple geographically dispersed databases
C) Encrypting database backups
D) Managing access control for database objects
Answer: B
Which of the following is a consideration when implementing distributed replication?
A) Maximizing data encryption
B) Minimizing query complexity
C) Ensuring low latency across distributed databases
D) Securing database backups
Answer: CWhat is the difference between synchronous and asynchronous replication?
A) Synchronous replication guarantees immediate consistency across databases, while asynchronous replication introduces a delay.
B) Synchronous replication requires more network bandwidth than asynchronous replication.
C) Asynchronous replication is more complex to implement than synchronous replication.
D) Synchronous replication is used only for read-heavy workloads, while asynchronous replication is used for write-heavy workloads.
Answer: A
Which factor is crucial in determining the choice between synchronous and asynchronous replication?
A) Database encryption standards
B) Network latency and bandwidth availability
C) Size of the database schema
D) Number of database connections
Answer: B
What is a disadvantage of synchronous replication compared to asynchronous replication?
A) Higher likelihood of data loss during network failures
B) Increased complexity in configuration
C) Greater storage space requirements
D) Slower response times for read operations
Answer: A
In distributed database systems, what does the term “CAP theorem” refer to?
A) A theory about the trade-offs between consistency, availability, and partition tolerance
B) A framework for database encryption standards
C) A method for query optimization in distributed databases
D) A guideline for implementing data normalization
Answer: A
Which type of replication allows for multiple copies of data across different geographical locations?
A) Synchronous replication
B) Asynchronous replication
C) Distributed replication
D) Parallel replication
Answer: C
What is the purpose of conflict resolution in database replication?
A) To ensure encryption of replicated data
B) To prevent data corruption during replication
C) To minimize query complexity
D) To manage access control for replicated data
Answer: B
Which technique is commonly used to resolve conflicts in database replication?
A) Data masking
B) Encryption
C) Timestamp-based resolution
D) Indexing
Answer: C
What is meant by active-active replication in database systems?
A) All databases are active for read and write operations simultaneously
B) Data is replicated only when changes occur
C) Replication occurs in a single direction
D) Replication is delayed for a specified period
Answer: A
Which of the following is an advantage of active-active replication?
A) Reduced network latency
B) Lower storage costs
C) Enhanced disaster recovery capabilities
D) Simplified conflict resolution
Answer: C
What is the role of a replication coordinator in distributed databases?
A) To encrypt data during replication
B) To manage network bandwidth usage
C) To ensure consistency and coordination among replicas
D) To optimize query performance
Answer: C
Which consistency model ensures that all nodes see the same data at the same time in a distributed database?
A) Eventual consistency
B) Strong consistency
C) Weak consistency
D) Probabilistic consistency
Answer: B
What is the trade-off between consistency and availability in the CAP theorem?
A) Increased data redundancy
B) Improved query performance
C) Reduced data consistency under network partitions
D) Enhanced network security
Answer: C
Which technique ensures that transactions are processed in the same order across all nodes in a distributed database?
A) Eventual consistency
B) Vector clock
C) Lamport timestamp
D) Consensus algorithm
Answer: D
What is data sharding in the context of distributed databases?
A) Encrypting data during transmission
B) Dividing data into smaller, manageable parts distributed across multiple database nodes
C) Replicating data across multiple databases
D) Managing access control for database objects
Answer: B
Which of the following is a benefit of data sharding?
A) Simplified query optimization
B) Increased data redundancy
C) Enhanced data masking capabilities
D) Improved query performance
Answer: D
What is meant by eventual consistency in distributed databases?
A) All updates are immediately propagated to all nodes
B) Data consistency is guaranteed at all times
C) Temporary inconsistency may occur but will eventually be resolved
D) Consistency is maintained across multiple geographical locations
Answer: C
Which factor is critical for ensuring successful data replication across geographically dispersed locations?
A) Encryption standards
B) Network latency
C) Query complexity
D) Data normalization
Answer: B
In database replication, what does the term “master-slave replication” refer to?
A) Both databases are equal in terms of authority and capabilities
B) One database serves as the primary source for updates, while others replicate these updates
C) All databases are synchronized simultaneously
D) Replication occurs based on a predetermined schedule
Answer: B
Which replication method allows for load balancing in database systems?
A) Synchronous replication
B) Asynchronous replication
C) Parallel replication
D) Master-slave replication
Answer: C
What is the role of a distributed transaction coordinator in distributed databases?
A) To manage data encryption during replication
B) To ensure data consistency across distributed transactions
C) To optimize query performance
D) To enforce access control policies
Answer: B