Explore topic-wise MCQs in Mongodb.

This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Mongodb knowledge and support exam preparation. Choose a topic below to get started.

1.

________ is the ability of a query to narrow results using the index.

A. Causality
B. Cardinality
C. Selectivity
D. All of the mentioned
Answer» C. Selectivity
Discussion
2.

Indexes do not have to fit entirely into ______ in all cases.

A. ROM
B. RAM
C. Secondary Storage
D. None of the mentioned
Answer» B. RAM
Discussion
3.

INDEXES_DO_NOT_HAVE_TO_FIT_ENTIRELY_INTO________IN_ALL_CASES.?$

A. ROM
B. RAM
C. Secondary Storage
D. None of the mentioned
Answer» B. RAM
Discussion
4.

_________is_the_ability_of_a_query_to_narrow_results_using_the_index.$

A. Causality
B. Cardinality
C. Selectivity
D. All of the mentioned
Answer» C. Selectivity
Discussion
5.

__________ method provides a wrapper around the totalIndexSize output of the collStats (i.e. db.collection.stats()) operation.

A. db.collection.totalallIndexSize()
B. db.collection.totalIndexSizeAll()
C. db.collection.totalIndexSize()
D. all of the mentioned
Answer» D. all of the mentioned
Discussion
6.

An index can support sort operations on a non-prefix subset of the index key pattern using _________ condition.

A. predicate
B. selection
C. equality
D. none of the mentioned
Answer» D. none of the mentioned
Discussion
7.

Sort operations that do not use an index will abort when they use _______ megabytes of memory.

A. 16
B. 32
C. 64
D. All of the mentioned
Answer» C. 64
Discussion
8.

A prefix of a _______ index is a subset that consists of one or more keys at the start of the index key pattern.

A. unique
B. primary
C. compound
D. none of the mentioned
Answer» C. compound
Discussion
9.

_________ operations that use an index often have better performance than those that do not use an index.

A. Select
B. Update
C. Delete
D. Sort
Answer» E.
Discussion