Question 48: You have been given metadata for creating Cassandra table.
Category text
Created_year int
course_id uuid
published_date timestamp
course_detail text
course_title text
user_id uuid
And you have created table as below
CREATE TABLE HADOOPEXAM (
Category text,
Created_year int,
published_date timestamp,
course_title text,
course_detail text,
user_id uuid,
course_id uuid,
PRIMARY KEY ((course_id))
);
What do you see in above table creation definition assuming combination of these three columns course_id, Category, Created_year to be unique across all data.
- It is a good design of table, it can avoid the upserts.
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Correct Answer : 3
Exp : Certainly its a bad table design in Cassandra. As you know it will not take care of record uniqueness also you can not make range query based on Created_year column. Assume our data as below
course_id, published_date, Created_year, course_title, course_detail, user_id
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