In which language MongoDB is written?
MongoDB is written and implemented in C++.
What do you understand by NoSQL databases? Is MongoDB a NoSQL database? explain.
At the present time, the internet is loaded with big data, big users, big complexity etc. and also becoming more complex day by day. NoSQL is answer of all these problems, It is not a traditional database management system, not even a relational database management system (RDBMS). NoSQL stands for “Not Only SQL”. NoSQL is a type of database that can handle and sort all type of unstructured, messy and complicated data. It is just a new way to think about the database.
Yes. MongoDB is a NoSQL database.
How to do Transaction/locking in MongoDB?
MongoDB doesn’t use traditional locking or complex transaction with Rollback. MongoDB is designed to be light weighted, fast and predictable to its performance. It keeps transaction support simple to enhance performance.
What is replica set in MongoDB?
A replica can be specified as a group of mongo instances that host the same data set. In a replica set, one node is primary, and another is secondary. All data is replicated from primary to secondary nodes.
Why are MongoDB data files large in size?
MongoDB doesn’t follow file system fragmentation and pre allocates data files to reserve space while setting up the server. That’s why MongoDB data files are large in size.
How does MongoDB provide concurrency?
MongoDB uses reader-writer locks for concurrency. Reader-writer locks allow concurrent readers shared access to a resource, such as a database or collection, but give exclusive access to a single write operation.
By default, which index is created by MongoDB for every collection?
By default, the_id collection is created for every collection by MongoDB.
Does MongoDB support primary-key, foreign-key relationship?
No. By Default, MongoDB doesn’t support primary key-foreign key relationship.
Does MongoDB need a lot space of Random Access Memory (RAM)?
No. MongoDB can be run on small free space of RAM.
Which are the different languages supported by MongoDB?
MonggoDB provides official driver support for C, C++, C#, Java, Node.js, Perl, PHP, Python, Ruby, Scala, Go and Erlang.
You can use MongoDB with any of the above languages. There are some other community supported drivers too but the above mentioned ones are officially provided by MongoDB.