Mongodb

Top MongoDB Interview Questions with Answers

MongoDB is one of the most popular NoSQL Database and there are many reasons to back this statement. It is an Open Source, Document Database which provides high performance and scalability of data along with data modeling and data management of huge sets of data in an enterprise application.

Due to its vast popularity, in various technical or programming Interviews, lots of questions are asked related to MongoDB and its applications. In this article, we are trying to host all the possible questions and answers related to MongoDB in one place.

All these Interview Questions related to MongoDB will contain all the basics, intermediate and advanced topics of MongoDB. So with wasting more time, let’s dive in.

MongoDB Interview Questions with Answers

What is MongoDB?

MongoDB is one of the most popular and widely used databases that store the data in the form of key-value pairs. It is an Open Source, Document Database and comes under the category of NoSQL Database.

MongoDB provides high performance and scalability along with data modeling and data management of huge sets of data in an enterprise application.

What are the key features of MongoDB?

Key Features of MongoDB are as follows:

  1. MongoDB is a document-oriented and NoSQL Database.
  2. It provides a very powerful Aggregation framework that can be used to process the data into some useful insights.
  3. It is a Schemaless database and supports sharding.
  4. In MongoDB, any field can be indexed.
  5. MongoDB also supports Adhoc Queries.

What is NoSQL Database? Explain

NoSQL stands for “Not Only SQL” is an alternative to traditional relational databases in which data is placed in tables and data schema is carefully designed before the database is built.

NoSQL databases are especially useful for working with large sets of distributed data. NoSQL database provides a mechanism for storage and retrieval of data that is modeled in means other than the tabular relations used in relational databases which makes them a perfect choice when the amount of data is big.

How is data stored in MongoDB?

In MongoDB, Data is stored in BSON documents. BSON Documents are JSON-style data structures. Documents contain one or more fields, and each field contains a value of a specific data type, including arrays, binary data, and sub-documents.

Documents that tend to share a similar structure or schema are organized as collections. It may be helpful to think of documents as analogous to rows in a relational database, fields as similar to columns, and collections as similar to tables.

MongoDB can be used with how many languages?

As per today, MongoDB provides support for almost all popular languages like C, C++, C#, Java, Node.js, Perl, PHP, Python, Ruby, Scala, Go and Erlang. MongoDB can easily be used with any of these languages.

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