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



Question : . You must define Constraint types in a conceptual data model?
: . You must define Constraint types in a conceptual data model?
1. True
2. False

Correct Answer : Get Lastest Questions and Answer :
Explanation: You will not define Constraint , in conceptual data model.




Question : In conceptual data modeling Attribute types can be

A. key
B. composite
C. multi-valued
D. A and C
E. A,B and C

: In conceptual data modeling Attribute types can be
1. key

2. composite

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4. 1 and 3

5. 1,2 and 3


Correct Answer : Get Lastest Questions and Answer :
Explanation: In conceptual data modeling Attribute types can be
key
composite
multi-valued





Question : In Cassandra, you will design tables based on Query ?
: In Cassandra, you will design tables based on Query ?
1. True
2. False

Correct Answer : Get Lastest Questions and Answer :
Explanation: Yes, in Cassandra. Before designing your tables. You must think and ask other team members, what all
queries are you going to execute and based on that, you will be designing the tables.


Related Questions

Question : You have below sample data from a csv file.

1be43390-9fe4-41e3-8d05-425861b86ab6, 1be43390-9fe4-11e3-8d05-425861b86ab6, Amit Jain, I am learning Cassandra from
HadoopExam, 111

Which of the following is correct definition of Cassandra table for this data.
 : You have below sample data from a csv file.
1.
2.
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4.



Question : You have been given below table definitions
CREATE TABLE HADOOPEXAM (

id uuid,
t_id timeuuid,
name text,
description text,
price int
primary key (t_id));

Now you run the below query

Select * from HADOOPEXAM where name='Amit Jain'

What is the expected result?
 : You have been given below table definitions
1. It will successfully return all the rows, where name matches.

2. It will run successfully, but result set would be empty, saying this is not supported.

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4. It will return first 5 matching rows only.



Question : You have been given below table definition, which of the following is a partition key?

CREATE TABLE HADOOPEXAM (

id uuid,
t_id timeuuid,
name text,
description text,
price int
primary key (t_id));
 : You have been given below table definition, which of the following is a partition key?
1. ID

2. NAME

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4. cannot be determined and will decided by Cassandra



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



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



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