Premium

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



Question : What is true about Chebotko Diagram ?

: What is true about Chebotko Diagram ?
1. These diagrams are graphical representation of Cassandra database schema design

2. They Helps, on Documenting Logical Data Model

 3. Access Mostly Uused Products by 50000+ Subscribers

4. 1 and 2

5. 1,2 and 3


Correct Answer : Get Lastest Questions and Answer :
Explanation:




Question : Which is true about logical and physical data model ?

A. Logical level shows column name and its properties
B. Physical level shows column name and its properties
C. Logical level shows column name , its properties and column data type
D. Physical level shows column name , its properties and column data type

: Which is true about logical and physical data model ?
1. A,B
2. B,C
 3. Access Mostly Uused Products by 50000+ Subscribers
4. A,D
5. B,D

Correct Answer : Get Lastest Questions and Answer :
Explanation: Logical level shows column name and its properties
Physical level shows column name , its properties and column data type
Physical level= Logical level + column data type





Question : Which is true about Chebotko Diagram notation ?


: Which is true about Chebotko Diagram notation ?
1. Counter is represented as ++

2. Secondary index represented as IDX

 3. Access Mostly Uused Products by 50000+ Subscribers

4. 1 and 3

5. 1 and 2

Correct Answer : Get Lastest Questions and Answer :
Explanation: Following are the notation

Partition Key Column : K
Clustering key column (ASC or DESC) : C with (Up or Down arrow)
Static Column : S
Secondary Index Column : IDX
Counter Column : ++
Collection Column (list) : []
Collection Column (set) : {}
Collection Column (map) : <>
UDT Column : *column_name*
Tuble Type : ()



Related Questions

Question : While querying the data from Cassandra table, you must be aware about the table partition keys. Which of the
below is correct with regards to partition key?
 : While querying the data from Cassandra table, you must be aware about the table partition keys. Which of the
1. Cassandra will take keys and then find the hash value of that the key to determine which node the
partition resides on

2. Partition keys dynamically generate primary indexes on table

3. Access Mostly Uused Products by 50000+ Subscribers

4. Partition keys add secondary index to Cassandra table



Question : In Cassandra table, number of columns can vary in different rows?
 : In Cassandra table, number of columns can vary in different rows?
1. True
2. False


Question : In Cassandra both column names and values have binary types
 : In Cassandra both column names and values have binary types
1. True
2. False


Question : Suppose you have following table definition

CREATE TABLE HADOOPEXAM (

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

What is the Cluster key over here?
 : Suppose you have following table definition
1. id

2. t_id

 3. Access Mostly Uused Products by 50000+ Subscribers

4. None of this



Question : Suppose you have following table definition

CREATE TABLE HADOOPEXAM (

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

What is the Cluster key overhere
 : Suppose you have following table definition
1. id

2. t_id

 3. Access Mostly Uused Products by 50000+ Subscribers

4. (id,cours_id)



Question : The purpose of partition key is to identify the partition or node in the cluster which stores that row.
 : The purpose of partition key is to identify the partition or node in the cluster which stores that row.
1. True
2. False