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



Question : As you know, Cassandra storage has a altogether different way of storing the data in underline storage to make is
more efficient for read data for a particular scenario. Which of the following is the smallest atomic unit of storage in
Cassandra?
: As you know, Cassandra storage has a altogether different way of storing the data in underline storage to make is
1. keyspace

2. key-value

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4. partition


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Question : What is a Cell in a Cassandra?
: What is a Cell in a Cassandra?
1. table block

2. key-value pair

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4. partition value


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Question : As you know, in Cassandra cluster data spread across the nodes in Cluster as well as data splitted in partitions,
what exactly is a partition?
: As you know, in Cassandra cluster data spread across the nodes in Cluster as well as data splitted in partitions,
1. key-value pair

2. database slice

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4. group of nodes


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Related Questions

Question : By doing data nesting in Cassandra, we can support a partition per query access pattern
 : By doing data nesting in Cassandra, we can support a partition per query access pattern
1. True
2. False


Question : What all are the advantages of Mapping Rule if applied correctly in Cassandra Data Model?
A. ensure that logical data model is correct
B. each query has a corresponding table
C. tables are designed to allow query to execute properly
D. table returns data in correct order

 : What all are the advantages of Mapping Rule if applied correctly in Cassandra Data Model?
1. A,B,C
2. B,C,D
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4. A,C,D
5. A,B,C,D


Question : As per mapping rule (Entity and Relationship) what is true ?
 : As per mapping rule (Entity and Relationship) what is true ?
1. Entity and relationship types map to tables

2. Entities and relationships map to table rows

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table columns at
the logical level.

4. 1 and 3

5. 1,2 and 3



Question : You have a query with the where clause and all the predicates use equality operator like =, != etc.
What is correct in this scenario, with regards to mapping rule?
 : You have a query with the where clause and all the predicates use equality operator like =, != etc.
1. search attributes, which are used in a query predicate, map to the prefix columns of a table primary key.

2. Such columns must include all partition key columns and, optionally, one or more clustering key columns.

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4. 1 and 2

5. 2 and 3



Question : Which of the following is correct with regards to mapping rule Inequality Search Attributes
 : Which of the following is correct with regards to mapping rule Inequality Search Attributes
1. An inequality search attribute, which is used in a query predicate, maps to a table clustering key column.

2. In the primary key definition, a column that participates in inequality search must follow columns that
participate in equality search.

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4. 1 and 2

5. 1,2 and 3



Question : You have a query, where you have to order by the data by a particular column. In this case you have to use this
column with the clustering key?
 : You have a query, where you have to order by the data by a particular column. In this case you have to use this
1. True
2. False