MongoDB Interview Questions


Know All About MongoDB and Its Uses

A database is an important and crucial aspect of technology in the present time. Its use and applicability are across different sectors which aid in securing the data and carrying out various processes. The mongodb is an open source type of database which is the most sought database model that supports a large amount of data. Here’s an overview and an in-detail explanation of what is mongodb and everything one needs to know about it.

What is MongoDB?

This particular database devised by Eliot Horowitz and Dwight Merriman is an open source and cross-platform database. It adopts the document-oriented model of data for carrying out its functions. The primary reason for creating this model was the scalability and development issues using traditional relational databases which hindered in building web applications. Thus, both the creators ended up developing a document database that is more flexible and scalable as well as one that supports the saving large amount of data.

One of the important reasons why mongodb documentation is the most chosen is that it supports dynamic schema design in lines of NoSQL database, which makes it easier for the documents in a collection of different structures and fields to operate.

What is the process used?

As the database is document-oriented, mongodb create database using architecture or structuring of collections and documents in comparison to tables and rows that are used in the case of relational databases. The document here comprises of key values organized in sets that serve as the basic unit data for mongodb commands, while the collection part is made up of a set of documents and functions which are equivalent to tables in a relational database.

What are the features of MongoDB?

Some of the features of the databases are as follows:

  • Indexes – Indexes are one of the most important aspects, which help in solving mongodb query. A mongodb index allows in performing collection scan properly. It scans every document in a collection for selecting all the documents that match the statements in the query. Furthermore, when it finds a match for the query, it uses the same in limiting documents required for inspection.
  • Replication – It assists in contributing high-availability of replica sets. Each replica set comprises two or more copies of data in it.
  • Storage of file – mongodb find a file system much easily that includes balancing load and replication of data over multiple machines.
  • Balancing of load – mongodb sharding technique aids in the horizontal scaling of documents. Not only does it run on multiple servers, it also helps in balancing load for duplicating files without leading to hardware failure.
  • Capped collection – The database supports fixed-size collections. This technique is also known as a capped collection.
  • Aggregation – Developers and programmers can obtain SQL kind of results that use clauses with the assistance of this framework.
  • Execution using JavaScript – One can use JavaScript for aggregating functions, directly transfer or send databases which are to be executed as well as use them in queries.


Advantages of MongoDB database

Below mentioned are few of the advantages which are as follows:

  • It improves scalability and flexibility
  • It aids in improving performance by replicating multiple files of the data
  • Easy switching from single server to complex ad multi-site structuring.
  • High availability and means to select documents for scanning of collection using mongodb index.


What is an atlas in mongodb?

A mongodb atlas is a form of wholly managed cloud database. This is developed by the same people who developed the database. The purpose of an atlas is for handling the complex process of management, deployment, and healing of deployments using the cloud service provider which include service providers such as Azure, GCP, and AWS.

Importance of the database

Being an open-source database, which uses cross-platform techniques for transfer data, this particular database holds an important stand in the programming world. It is not only much easy to use and solve the complexity of data, it is also the most preferred databases on job front thus opening a lot of career opportunity for candidates who wish to create future in this field.

Thus, pertaining to its importance, there is the Mongodb University which offers guidance on the subject through online mode across the globe. Students and individuals who are interested in learning about mongodb update and other aspects related to it are assisted through mongodb tutorial in the form of videos and lectures.

Download and installation of MongoDB

Some of the many MongoDB Interview Questions listed below will help you get an idea about what questions gets asked in such jobs related to Software Engineering & Tech. Get through the MongoDB Interview bar with our selected MongoDB Interview Questions for all MongoDB enthusiasts!

Some of the many MongoDB Interview Questions listed below will help you get an idea about what questions gets asked in such jobs related to Software Engineering & Tech. Get through the MongoDB Interview bar with our selected MongoDB Interview Questions for all MongoDB enthusiasts!


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