Splendid Distributed Databases Test - 79+ MCQs: Distributed Databases test: Assess Your Knowledge with Challenging Questions and Answers

1. Define the term 'isolation' in the context of distributed databases.

Isolation is the process of isolating a distributed database from external access.

Isolation is irrelevant in distributed databases.

Isolation refers to the independence of transactions, ensuring they do not interfere with each other.

Isolation only applies to vertical partitioning.

2. What is the purpose of the two-phase commit protocol in distributed databases?

Ensuring Data Isolation

Achieving Atomicity

Handling Network Failures

Optimizing Query Performance

3. In distributed databases, what does ACID stand for?

Atomicity, Consistency, Isolation, Durability

Availability, Concurrency, Integrity, Durability

Atomic, Causal, Isolated, Durable

Agility, Compatibility, Isolation, Decoupling

4. Explain the role of a distributed lock in maintaining data integrity.

Distributed locks are not used for data integrity.

Distributed locks ensure immediate consistency across all nodes.

Distributed locks prevent simultaneous access to shared resources, maintaining data integrity.

Distributed locks only apply to centralized databases.

5. Define the term 'fault tolerance' in the context of distributed databases.

Fault tolerance refers to the intentional introduction of errors in a database.

Fault tolerance is irrelevant in distributed databases.

Fault tolerance is the ability of a system to continue operating even in the presence of hardware or software failures.

Fault tolerance only applies to centralized databases.

6. Discuss the challenges and solutions related to achieving atomicity in distributed transactions across multiple nodes, considering scenarios of partial failures.

Concurrency Control

Query Optimization

Data Encryption

Logical Clock Synchronization

7. What is the role of a distributed coordinator in a distributed database system?

To manage a single database.

To coordinate transactions and ensure consistency across multiple databases.

To create backups for data security.

To limit access to the database.

8. Discuss the concept of eventual consistency in distributed databases.

Eventual consistency ensures immediate synchronization of data across all nodes in a distributed database.

Eventual consistency prioritizes immediate consistency over time.

Eventual consistency allows temporary inconsistencies that will be resolved in the future.

Eventual consistency is irrelevant in distributed databases.

9. How does the 'Raft consensus algorithm' differ from the 'Paxos algorithm' in terms of simplicity and usability in distributed systems?

Load Balancing

Consensus Protocol

Data Encryption

Query Optimization

10. What is the role of a distributed database coordinator?

Data Storage

Query Execution

Data Distribution

Transaction Management

Distributed Databases MCQ Test 5