DataStax Cassandra Developer Certification Certification Questions and Answer (Dumps and Practice Questions)

Question : Which of the following collection types are not supported for creating index in Cassandra table definition


1. map

2. set

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4. 1,2 and 3

5. None of the above


Correct Answer : Get Lastest Questions and Answer :
Explanation: In Apache Cassandra 2.1 and later, you can create an index on a column of type map, set, or list.




Question : Which of the following is correct statement?
A. A frozen value serializes multiple components into a single value.
B. Non-frozen types allow updates to individual fields.
C. Apache Cassandra treats the value of a frozen type as a blob
D. You cannot use non-frozen collections for primary key columns.


1. A,B,C
2. B,C,D
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4. A,B,D
5. A,B,C,D

Correct Answer : Get Lastest Questions and Answer :
Explanation: A frozen value serializes multiple components into a single value. Non-frozen types allow updates to
individual fields. Apache Cassandra treats the value of a frozen type as a blob. The entire value must be overwritten.

Note: You cannot use non-frozen collections for primary key columns. However, you can use frozen collections for primary key
columns.
column_name >





Question : NetworkTopologyStrategy is recommended for most deployments because it is much easier to expand to multiple data
centers when required by future expansion.

1. True
2. False

Correct Answer : Get Lastest Questions and Answer :
Explanation: For production use or for use with mixed workloads, create the keyspace using
NetworkTopologyStrategy. SimpleStrategy is fine for evaluation purposes. NetworkTopologyStrategy is recommended for most
deployments because it is much easier to expand to multiple data centers when required by future expansion.

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