Explanation:Document databases pair each key with a complex data structure known as a document. 4. Which of the following is a wide-column store ?
A. Cassandra
B. Riak
C. MongoDB
D. Redis
Answer:A
Explanation:Document databases pair each key with a complex data structure known as a document. 4. Which of the following is a wide-column store ?
A. Cassandra B. Riak C. MongoDB D. Redis