MongoDB C100DBA Exam Questions Instant Access

Question 1

What is the use of mongodump and mongorestore tools?

Abackup mongodb deployment

Baudit mongodb deployment

Cperformance tune mongodb deployment

Dreplicate mongodb deployments

Answer : A

Question 2

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

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

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

CfindOneQ returns the actual first document retrieved from a collection

DfindQ and findOneQ returns cursors to the collection documents

Answer : D

Question 3

Which node in a replica set does accept write operation?

Aarbiter

Bhidden

Cprimary

Dsecondary

Answer : C

Question 4

Which of the following operators is used to updated a document partially?

A$set

B$update

C$project

D$modify

Answer : A

Question 5

What is the first task that a secondary would perform on being prompted by another secondary for an election?

AStart the election process for primary

BVote for the first secondary so that it would become the next primary

CVote for itself and then call for election

DConnect to primary to confirm its availability

Answer : D

Question 6

Which format/standard is used by MongoDB internally to store documents?

AJSON

BBSON

CB+ Trees

DJSON - Extended

Answer : A

Question 7

What does the totalKeysExamined field returned by the explain method indicate?

ANumber of documents that match the query condition

BNumber of index entries scanned

CDetails the completed execution of the winning plan as a tree of stages

DNumber of documents scanned

Answer : B

MongoDB Certified DBA Associate C100DBA Exam Questions