Cassandra вопросы и ответы для интервью
Вопрос 1. What is Apache Cassandra?
Apache Cassandra is a highly scalable and distributed NoSQL database system designed to handle large amounts of data across multiple commodity servers without a single point of failure.
Вопрос 2. Explain the CAP theorem and how it relates to Cassandra.
The CAP theorem states that a distributed system cannot simultaneously provide more than two out of three guarantees: Consistency, Availability, and Partition Tolerance. Cassandra prioritizes Availability and Partition Tolerance over Consistency, making it an AP system.
Вопрос 3. What is a key space in Cassandra?
A key space in Cassandra is a namespace that defines data replication on nodes. It is the outermost container for data, similar to a database in the relational database world.
Вопрос 4. Explain the concept of a node in Cassandra.
A node in Cassandra is an individual server that stores data. Nodes work together to form a distributed and decentralized database system.
Вопрос 5. What is a partition key in Cassandra?
A partition key is a primary key assigned to each row in a Cassandra table. It is responsible for distributing data across nodes in the cluster and is crucial for the performance of queries.
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