Online Access Free C100DBA Exam Questions

Which of the following commands can cause the database to be locked?

• A.Map-reduce
• B.Inserting data
• C.All of the above
• D.Issuing a query

In which of the following scenarios is sharding not the correct option. Select all that apply.

• A.The write operations on the collection are very high
• B.The write operations on the collection are low
• C.The working set in the collection is expected to grow very large in size
• D.The collection is a read intensive collection with less working set

MongoDB is a schema-less design.

• A.True
• B.False

Which features of relational database management systems were deliberately omitted in MongoDB and help us to obtain horizontal scalability? Check all that apply.

• A.Authentication
• B.Joins
• C.Multi-statement transactions

A collection and a document in MongoDB is equivalent to which of the SQL concepts respectively?

• A.Database and Table
• B.Column and Row
• C.Table and Column
• D.Table and Row