Indexing for Performance MCQ , MongoDB Indexes Practice Questions

Direction: Choose the correct option

What is an index in MongoDB?

A. A backup of the database

B. A data structure that improves the speed of queries

C. A copy of a collection

D. A relationship between collections

Direction: Choose the correct option

Which method creates an index on a field?

A. db.collection.addIndex()

B. db.collection.createIndex()

C. db.collection.indexField()

D. db.collection.newIndex()

Direction: Choose the correct option

What is a unique index?

A. An index that prevents duplicate values for the indexed field(s)

B. An index that can only be used once

C. An index that is automatically deleted

D. An index on a single field

Direction: Choose the correct option

How can you check which indexes exist on a collection?

A. db.collection.showIndexes()

B. db.collection.indexes()

C. db.collection.listIndexes()

D. db.collection.getIndexes()

Direction: Choose the correct option

What is a compound index?

A. An index that combines two collections

B. An index that uses multiple data types

C. An index that is compressed

D. An index on multiple fields

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