Database Distribution and Replication: Enhance Database Scalability and Availability

Question 1

Which of the following is a disadvantage of database replication?

Accepted Answer

Increased network traffic

Answer

Enhanced data availability

Answer

Improved data security

Answer

Enhanced performance for read-intensive applications

Question 2

Which of the following is a significant benefit of database replication?

Accepted Answer

Enhanced data availability

Answer

Improved data consistency

Answer

Reduced data recovery time

Answer

Accelerated query performance

Question 3

In a distributed database system, which component is responsible for coordinating data transactions across multiple sites?

Accepted Answer

Transaction manager

Answer

Database server

Answer

Query optimizer

Answer

Data dictionary

Question 4

What is the primary objective of a distributed query optimizer?

Accepted Answer

Optimize queries across multiple database sites

Answer

Minimize data transfers between sites

Answer

Ensure data consistency during distributed transactions

Answer

Prevent deadlocks in distributed systems

Question 5

Which of the following is NOT a key consideration when designing a distributed database system?

Accepted Answer

Database vendor compatibility

Answer

Data consistency requirements

Answer

Hardware and network infrastructure

Answer

Security and privacy regulations

Question 6

What is the role of a data synchronization tool in a distributed database environment?

Accepted Answer

Ensure data consistency between multiple database replicas

Answer

Optimize query performance across distributed sites

Answer

Manage data replication and failover scenarios

Answer

Monitor and troubleshoot distributed database systems

Question 7

Which database replication technique replicates only the changes made to the primary database, reducing network traffic and storage requirements?

Accepted Answer

Asynchronous replication

Answer

Synchronous replication

Answer

Multi-master replication

Question 8

Evaluate the potential drawbacks and challenges of database replication, focusing on data integrity, synchronization, and resource consumption.

Accepted Answer

Data integrity issues due to inconsistencies arising from replication

Accepted Answer

Performance degradation caused by the overhead of managing and synchronizing multiple replicas

Answer

Increased scalability resulting from data distribution across multiple replicas

Answer

Simplified data management due to a centralized database

Question 9

What is the primary goal of data replication?

Accepted Answer

To increase database availability and fault tolerance

Answer

To improve data performance and reduce latency

Answer

To reduce data loss risks in case of hardware failure

Answer

To simplify data maintenance and reduce administrative overhead

Question 10

What is the primary role of a transaction coordinator in a distributed database system?

Accepted Answer

To ensure data consistency and atomicity across multiple sites and transactions

Answer

To manage data replication operations and maintain data currency

Answer

To handle transaction failures and ensure data integrity in the presence of failures

Answer

To optimize query processing and improve database performance

Question 11

What is the primary purpose of a commit log in a distributed database system?

Accepted Answer

To record all committed transactions and their associated changes

Answer

To maintain a persistent copy of the database schema and metadata

Answer

To track data changes during active transactions

Answer

To facilitate data recovery in case of system failures or data corruption

Question 12

What is the process of maintaining multiple copies of a database on different servers known as?

Accepted Answer

Replication

Answer

Sharding

Answer

Federation

Answer

Partitioning

Question 13

Which type of replication ensures the highest level of data consistency across replicas?

Accepted Answer

Synchronous replication

Answer

Semi-synchronous replication

Answer

Asynchronous replication

Question 14

Which of the following is NOT a potential challenge associated with database distribution?

Accepted Answer

Simplified data management

Answer

Increased complexity and management overhead

Answer

Potential data inconsistency

Question 15

What is the main purpose of using a commit log in replication?

Accepted Answer

To track and record database changes for replication purposes.

Answer

To improve performance by caching frequently accessed data.

Answer

To provide a backup for data recovery in case of server failure.

Question 16

What is the primary objective of database sharding?

Accepted Answer

To distribute data across multiple servers based on a specific key or range of keys.

Answer

To replicate data across multiple servers for redundancy and failover.

Answer

To partition data vertically into different tables based on specific attributes.

Question 17

Which of the following is a primary advantage of database distribution?

Accepted Answer

Enhanced scalability and availability

Answer

Increased data redundancy

Answer

Reduced data security

Answer

Reduced data consistency

Question 18

What is a key challenge associated with database replication?

Accepted Answer

Managing increased complexity, cost, and potential data inconsistencies

Answer

Reducing data availability

Answer

Improving data security

Answer

Ensuring high data integrity

Question 19

Which replication method provides near real-time updates to remote databases?

Accepted Answer

Synchronous replication

Answer

Snapshot replication

Answer

Asynchronous replication

Answer

Merge replication

Question 20

Which of the following is a potential risk of database distribution?

Accepted Answer

Data inconsistency among distributed databases

Answer

Increased data recovery time

Answer

Improved data security

Answer

Reduced data redundancy

Question 21

What is the primary responsibility of a transaction coordinator in a distributed database system?

Accepted Answer

Coordinating and managing transactions across multiple databases to ensure data consistency

Answer

Handling data integrity checks

Answer

Managing data replication

Question 22

Which of the following is an advantage of using logical replication over physical replication?

Accepted Answer

Lower overhead due to reduced data transfer and storage requirements

Answer

Enhanced security

Answer

Increased data recovery time

Answer

Improved data consistency

Question 23

What is the main purpose of a distributed query optimizer in a distributed database system?

Accepted Answer

Determining the most efficient execution plan for queries by considering data distribution and network constraints

Answer

Optimizing data storage and retrieval processes

Answer

Enforcing data integrity constraints

Question 24

What is a crucial factor to consider when selecting an appropriate data distribution scheme?

Accepted Answer

The nature of the data, workload patterns, and query types

Answer

The cost of the hardware

Answer

The number of distributed databases

Answer

The physical location of the databases

Question 25

Which of the following is a primary advantage of using a distributed database architecture?

Accepted Answer

Improved scalability

Answer

Simplified data management

Answer

Reduced cost

Answer

Enhanced security

Question 26

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

Accepted Answer

To specify the number of copies or replicas for each data item

Answer

To control the timing and frequency of data replication

Answer

To determine the level of data consistency

Question 27

Which of the following is a potential challenge associated with database replication?

Accepted Answer

Maintaining data consistency across multiple replicas

Answer

Simplified data management

Answer

Increased network traffic

Question 28

What is the key distinction between synchronous and asynchronous replication in distributed databases?

Accepted Answer

Synchronous replication ensures immediate updates on all replicas, while asynchronous replication allows for a delay.

Answer

Asynchronous replication is generally faster than synchronous replication.

Question 29

Which type of database partitioning divides data horizontally, based on row values?

Accepted Answer

Horizontal partitioning

Answer

Vertical partitioning

Answer

Hash partitioning

Question 30

What is the primary goal of database fragmentation?

Accepted Answer

To enhance query performance by distributing data across multiple storage devices

Answer

To improve data security

Answer

To reduce database size

Question 31

Which of the following is an advantage of using a distributed database?

Accepted Answer

Increased data availability through replication

Answer

Lower hardware costs

Answer

Reduced redundancy

Question 32

What is the primary responsibility of a transaction manager in a distributed database system?

Accepted Answer

To ensure the ACID (Atomicity, Consistency, Isolation, Durability) properties of transactions across multiple nodes

Answer

To manage database connections and resources

Question 33

What is the fundamental distinction between horizontal and vertical partitioning in database distribution?

Accepted Answer

Horizontal partitioning divides data rows, while vertical partitioning divides data columns.

Answer

Horizontal partitioning is used for read-only data, while vertical partitioning is used for read-write data.

Answer

Horizontal partitioning requires more storage space than vertical partitioning.

Question 34

Which of the following is a primary challenge associated with database replication?

Accepted Answer

Data Consistency Maintenance

Answer

Increased Storage Requirements

Answer

Reduced Data Availability

Answer

Complex Query Processing

Question 35

What is the primary responsibility of a replica manager in a replicated database system?

Accepted Answer

To coordinate updates and ensure data consistency across replicas.

Answer

To process read requests and reduce the load on the primary database.

Answer

To store a backup copy of the database in case of a primary database failure.

Question 36

Which type of database replication involves updating all replicas before committing a transaction?

Accepted Answer

Synchronous Replication

Answer

Asynchronous Replication

Answer

Semi-synchronous Replication

Answer

Multi-master Replication

Question 37

What is the primary purpose of database sharding?

Accepted Answer

To distribute data across multiple physical servers for improved scalability and performance.

Answer

To reduce data redundancy and ensure data integrity.

Answer

To facilitate data backup and recovery operations.

Question 38

What is a key difference between a distributed database and a replicated database?

Accepted Answer

Distributed databases have multiple independent copies of the data, while replicated databases have one primary copy and multiple secondary copies.

Answer

Distributed databases are designed for high availability, while replicated databases are designed for scalability.

Question 39

What is the primary goal of database clustering?

Accepted Answer

To group multiple database servers together to improve performance and availability.

Answer

To replicate data across multiple servers for fault tolerance.

Answer

To distribute data across multiple servers for scalability.

Question 40

Which of the following is a key benefit of database distribution?

Accepted Answer

Improved scalability and data availability

Answer

Elimination of data inconsistencies

Answer

Increased data redundancy

Answer

Reduced hardware costs

Question 41

Data replication involves creating and maintaining multiple copies of a database on different servers. What is a primary advantage of data replication?

Accepted Answer

Enhanced data availability and fault tolerance

Answer

Simplified data synchronization

Answer

Reduced network traffic

Answer

Improved data integrity

Question 42

Which of the following is a significant challenge associated with database distribution?

Accepted Answer

Managing data consistency and integrity across multiple databases

Answer

Increased network latency

Answer

Complex query processing

Answer

High hardware costs

Question 43

In a distributed database system, a(n) ____ is used to coordinate and manage transactions across multiple databases.

Accepted Answer

Transaction manager

Answer

Query optimizer

Answer

Data dictionary

Answer

Database administrator

Question 44

Which of the following is a type of data replication that involves replicating only data that has changed since the last replication cycle?

Accepted Answer

Incremental replication

Answer

Partial replication

Answer

Full replication

Answer

Synchronous replication

Question 45

In a distributed database system, a(n) ____ is used to divide data into smaller, more manageable units.

Accepted Answer

Partition

Answer

Table

Answer

Schema

Answer

Index

Question 46

What is the primary function of a lock manager in a distributed database system?

Accepted Answer

To coordinate and manage database locks across multiple nodes, ensuring data integrity

Answer

To optimize database queries

Answer

To encrypt data during transmission

Question 47

In a distributed database system, a(n) ____ is used to route queries to the appropriate database nodes.

Accepted Answer

Query router

Answer

Transaction manager

Answer

Lock manager

Answer

Catalog manager

Question 48

State one disadvantage of database distribution.

Accepted Answer

Reduced data security

Answer

Enhanced availability

Answer

Improved performance

Answer

Increased scalability

Question 49

Which replication strategy is characterized by immediate update propagation from the primary to the secondary database?

Accepted Answer

Synchronous replication

Answer

Snapshot replication

Answer

Asynchronous replication

Answer

Transactional replication

Question 50

Identify a potential issue associated with database replication.

Accepted Answer

Increased complexity of database administration

Answer

Enhanced system performance

Answer

Improved data consistency

Answer

Reduced data storage costs

Question 51

A database architecture featuring data distribution across multiple servers is known as a:

Accepted Answer

Distributed database

Answer

NoSQL database

Answer

Relational database

Answer

Centralized database

Question 52

For applications emphasizing real-time data consistency and low latency, which replication type is the most suitable?

Accepted Answer

Synchronous replication

Answer

Asynchronous replication

Answer

Transactional replication

Answer

Snapshot replication

Question 53

Describe the process of splitting data into smaller units and storing them on separate servers in a distributed database.

Accepted Answer

Data partitioning

Answer

Data warehousing

Answer

Data mining

Answer

Data replication

Question 54

A distributed database architecture that employs a single centralized database as the primary data source is referred to as:

Accepted Answer

Master-slave replication

Answer

Snapshot replication

Answer

Peer-to-peer replication

Answer

Transactional replication

Question 55

In a distributed database environment, the mechanism responsible for maintaining data consistency across multiple nodes is:

Accepted Answer

Concurrency control

Answer

Data warehousing

Answer

Data integrity

Answer

Data normalization

Question 56

Which technique is commonly employed to resolve data conflicts in a distributed database?

Accepted Answer

Two-phase commit protocol

Answer

Data mining

Answer

Data normalization

Answer

Data warehousing