Online Access Free MongoDB.C100DBA.v2022-09-26.q45 Practice Test (Page 6)

C100DBA Exam Question 21

You have a replicated cluster with 1 primary, 3 secondary, 1 arbiter. One of the secondary is hidden. What is the replication factor of this replicated cluster?

A.04

B.03

C.06

D.7

C100DBA Exam Question 22

What is the equivalent command in MongoDB for the following SQL query?
SELECT * FROM posts WHERE author like "%john%"

A.db.posts.find( { author: {$like: /John/} } )

B.db.posts.find( { author: /AjohnA/ > )

C.db.posts.find( { author: /John/ } )

D.db.posts.find( { $like: {author: /John/} } )

C100DBA Exam Question 23

In a collection that contains 100 post documents, what does the following command do? db. posts.
find().skip(5).limit(5)

A.Limits the first five documents and then return them in reverse order

B.Skip and limit nullify each other. Hence returning the first five documents

C.Skips the first five documents and returns the next five

D.Skips the first five documents and returns the sixth document five times

C100DBA Exam Question 24

Which of the following is incorrect statement about find and findOne operations in MongoDB?

A.findQ and findOneQ returns cursors to the collection documents

B.findQ returns all the documents in a collection while findOne() retrieves only the first one.

C.findOneQ returns the actual first document retrieved from a collection

D.find.limit(l) is not the same query as findOne()

C100DBA Exam Question 25

You perform the following operation in the shell: db.foo.insert( { } ); What gets inserted?

A.A document will be inserted with the same _id as the last document inserted

B.A document that matches the collection's existing schema, but with null fields

C.An empty document

D.No document will be inserted; an error will be raised

E.A document with an _id assigned to be an Objectld

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