data base non-sql Which of the following is/are correct? Select one or more: O a

Question

data base non-sql

Which of the following is/are correct? Select one or more: O a. Some NoSQL databases partially support the concept of schema, which also allows to add indexes. O b. NoSQL databases generally don't require a rigid schema before inserting data. O c. The concept of schema in NoSQL databases is often flexible, which allows programmers to modify data structure at runtime. d. NoSQL databases do not support schema at all. What are the reasons for considering a NoSQL database, rather than a relational database? Select one or more: a. Complex transactions can be performed to preserve consistency across difference transactions. b. Data is growing fast and changing in structure, which requires a database to scale out quickly. c. A database can allow the insertion of data without a pre-defined schema O d. A declarative query language is preferred for querying data and managing data integrity. Which of the following is/are correct? Select one or more: a. Some NoSQL databases let the programmer decide the trade-off between scalability and consistency b. Some NoSQL databases offer eventual consistency. c. Some NoSQL databases offer limited transactions. d. There are no transactions in any NoSQL databases 0

Explanation / Answer

1)Answer

a,b,c

2)Answer

b,c

3)Answer

a,b,c

4)Answer

a,b,g

5)Answer

a,e

MongoDB uses collections to store a set of doocuments.

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