40083361
Descripción
Test por Eladio Rocha, actualizado hace más de 1 año
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Creado por Eladio Rocha
hace casi 2 años
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Pregunta 1
Pregunta
What does Atomicity in ACID compliance ensure?
Respuesta
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Transactions are immediately readable by all users.
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Each transaction either fully succeeds or fully fails.
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Rules within the database are always consistently applied.
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Data is distributed across multiple partitions.
Pregunta 2
Pregunta
In ACID, how is Consistency defined?
Respuesta
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Data changes are immediately visible across all nodes.
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Database rules are consistently enforced during transactions.
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Data retrieval is consistent across replicas.
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Transactions never conflict with each other.
Pregunta 3
Pregunta
What is the main goal of Isolation in ACID?
Respuesta
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To allow multiple transactions to modify the same data simultaneously.
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To prevent transactions from interfering with each other.
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To propagate data quickly across distributed systems.
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To write data to durable storage.
Pregunta 4
Pregunta
What does Durability in ACID compliance guarantee?
Respuesta
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Data is stored in memory for faster access.
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Committed data will persist even after a crash.
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Transactions are visible across distributed systems.
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Data propagation is eventually consistent.
Pregunta 5
Pregunta
Which of the following is a core concept of the CAP Theorem?
Respuesta
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Scalability, Reliability, Durability
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Availability, Partition Tolerance, Consistency
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Atomicity, Durability, Replication
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Redundancy, Speed, Isolation
Pregunta 6
Pregunta
What is the trade-off when using a database like Cassandra in terms of the CAP Theorem?
Respuesta
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Sacrifices partition tolerance for strong consistency.
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Sacrifices consistency for availability and partition tolerance.
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Sacrifices availability for consistency and partition tolerance.
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Provides all three: consistency, availability, and partition tolerance.
Pregunta 7
Pregunta
What does Availability mean in the CAP Theorem?
Respuesta
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Data changes are consistently propagated immediately.
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The system avoids single points of failure.
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Transactions remain durable during failures.
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Data retrieval always reflects the most recent write.
Pregunta 8
Pregunta
What is an example of a system that sacrifices availability in favor of consistency and partition tolerance?
Respuesta
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MySQL
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Cassandra
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DynamoDB in eventual consistency mode
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MongoDB
Pregunta 9
Pregunta
How does Partition Tolerance benefit distributed databases?
Respuesta
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Ensures that no data is lost in case of system crashes.
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Allows the system to scale horizontally across multiple servers.
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Guarantees real-time consistency for all reads and writes.
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Eliminates the need for replication across nodes.
Pregunta 10
Pregunta
What is a common characteristic of modern database systems regarding CAP trade-offs?
Respuesta
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They strictly enforce the CAP Theorem limitations.
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They provide flexibility to optimize different properties based on use cases.
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They always prioritize availability over consistency.
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They eliminate the need for partition tolerance entirely.
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