priya

Yes. Yes, journaling features in MongoDB can be used to perform safe hot backups. Journaling in MongoDB is a feature that ensures the durability of write operations. When journaling is enabled, write operations are first recorded in a write-ahead log (WAL) or journal before being applied to the actual data files. This helps in recovering … Read more

Namespace is a concatenation of the database name and the collection name. Collection, in which MongoDB stores BSON objects. In MongoDB, a namespace refers to a combination of a database name and a collection name. The namespace uniquely identifies a specific collection within a specific database. It follows the format “database_name.collection_name”. For example, if you … Read more

By default, the_id collection is created for every collection by MongoDB. By default, MongoDB creates an _id index for every collection. The _id field is a unique identifier for each document in a collection, and MongoDB automatically creates an index on this field to optimize queries that involve searching for or retrieving documents by their … Read more

In MondoDB, Indexes are used to execute query efficiently. Without indexes, MongoDB must perform a collection scan, i.e. scan every document in a collection, to select those documents that match the query statement. If an appropriate index exists for a query, MongoDB can use the index to limit the number of documents it must inspect. … Read more

Yes. Yes, it is true that MongoDB uses BSON (Binary JSON) to represent document structure. BSON is a binary-encoded serialization of JSON-like documents and is the primary data representation for documents in MongoDB. It adds some additional data types and encoding to JSON to better support the data types used in MongoDB, such as ObjectId, … Read more