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 main function of utilizing a partition key in Apache Cassandra?

Reply Choices:

1. To uniquely establish 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 main function is to find out the distribution of information throughout the nodes within the cluster.
2. To find out the node the place the info shall be saved
   • Clarification: That is appropriate. The partition key’s hashed to find out the node the place the info ought to reside, making certain even information 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 information consistency throughout replicas
   • Clarification: Whereas the partition key helps in figuring out the info’s location, consistency is managed via replication settings and consistency ranges, in a roundabout way by the partition key.
5. To facilitate automated 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 information compaction and storage administration
   • Clarification: This isn’t the first function of the partition key. Knowledge 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 information is distributed throughout the nodes in a cluster. It ensures a fair distribution, which is important for load balancing and environment friendly question processing.

Area: Knowledge Distribution and Replication

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