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

Question : You have defined a table name HadoopExam with three columns Course_id, Course_title and course_description.
However, you want to introduce a new column to this table named Course_price. Which of the following will help you do this?

1. ALTER

2. REPLACE

3. Access Mostly Uused Products by 50000+ Subscribers

4. Not possible


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Explanation:




Question : Which All are the Cassandra column type?

1. LIST<>

2. SET<>

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4. DICTIONARY<>


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Explanation:




Question : Which of the following Collection type is supported by Cassandra table definition

1. list

2. list

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4. 1 and 2
5. 1,2 and 3


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Explanation: A collection column is declared using the collection type, followed by another type, such as int or
text, in angle brackets. For example, you can create a table having a list of textual elements, a list of integers, or a list
of some other element types.

list
list
Collection types cannot currently be nested. For example, you cannot define a list within a list:

list> // not allowed

Related Questions

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Question : You have been given below conceptual data model

And you have below Access pattern, which of the following is valid table design

where course_name=? and publish_date>?


1. A
2. B
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4. D


Question : You have data size is TB and your schema design will duplicate this data times, having replication factor=.
How much data are you going to duplicate?

1. 500TB

2. 50TB
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4. 5000TB



Question : You have following table designed

Comment_By_course
comment_id K
course_id C
Title
description

For each comment_id, you will be copying entire course detail again. Is this an issue ?


1. Yes
2. No
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Question : You have been given below conceptual data model

And you have below Access pattern, which of the following is valid table design

where rating=? and publish_date>?


1. A
2. B
3. Access Mostly Uused Products by 50000+ Subscribers
4. D


Question : You have been given below conceptual datamodel for HadoopExam Inc online training institute.

Please find the correct query for given access pattern

where author_id = ? (All the courses created by an author)


1. A
2. B
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4. D


Question :

1. A
2. B
3. Access Mostly Uused Products by 50000+ Subscribers
4. D