Given a collection posts as shown below having a document array comments, which of the...

MongoDB C100DBA Question Answer

Given a collection posts as shown below having a document array comments, which of the following command will create an index on the comment author descending?

db.posts.createIndex({^comments.$.author":-l});

db. posts.createIndex({^comments.author" :1});

db.posts.createIndex({^commerits.author";-!});

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MongoDB C100DBA Summary

Vendor: MongoDB
Product: C100DBA
Update on: Feb 7, 2026
Questions: 132

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Given a collection posts as shown below having a document array comments, which of the...

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