Apache Cassandra 3.x Developer Associate Certification Test

Apache Cassandra 3.x Developer Affiliate Certification Mock Examination Take a look at

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Pattern MCQ Query with Detailed Clarification

Query:

What’s the major objective of utilizing a partition key in Apache Cassandra?

Reply Choices:

1. To uniquely determine a row inside a desk
   • Clarification: This isn’t appropriate. Whereas the partition key’s a part of the first key and helps in figuring out rows, its major objective is to find out the distribution of information throughout the nodes within the cluster.
2. To find out the node the place the information will probably be saved
   • Clarification: That is appropriate. The partition key’s hashed to find out the node the place the information ought to reside, making certain even knowledge distribution and cargo balancing throughout the cluster.
3. To hurry up question efficiency by enabling secondary indexing
   • Clarification: That is incorrect. Secondary indexing is a separate characteristic and never immediately associated to the aim of the partition key.
4. To take care of knowledge consistency throughout replicas
   • Clarification: Whereas the partition key helps in figuring out the information’s location, consistency is managed by replication settings and consistency ranges, in a roundabout way by the partition key.
5. To facilitate computerized failover in case of node failure
   • Clarification: That is incorrect. Failover mechanisms are dealt with by the replication technique and consistency ranges in Cassandra.
6. To allow environment friendly knowledge compaction and storage administration
   • Clarification: This isn’t the first function of the partition key. Information compaction and storage administration are a part of Cassandra’s background processes.

Right Reply: 2

General Clarification: The partition key in Apache Cassandra is essential for figuring out how knowledge is distributed throughout the nodes in a cluster. It ensures an excellent distribution, which is crucial for load balancing and environment friendly question processing.

Area: Information Distribution and Replication

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