Contents
How does a tree structure work in MongoDB?
Presents a data model that organizes documents in a tree-like structure by storing references to “parent” nodes and an array that stores all ancestors. Presents a data model that organizes documents in a tree-like structure by storing full relationship paths between documents.
What do you need to know about MongoDB for an interview?
MongoDB is nothing but a document database that can store data in JSON documents. This MongoDB Interview Questions and Answers blog is specifically designed to help you get a closer look at the nature of interview questions that you might encounter.
What kind of locking does MongoDB use?
MongoDB does not use conventional locking with reduction as it is planned to be light, high-speed, and knowable in its presentation. It can be considered as parallel to the MySQL MyISAM auto entrust sculpt.
When do we use a namespace in MongoDB?
Although MongoDB, Couchbase and Couchbase DB are common in many ways, still they are different in the case of necessities for the execution of the model, crossing points, storage, duplications, etc. 6. When do we use a namespace in MongoDB?
Presents a data model that organizes documents in a tree-like structure by storing references to “parent” nodes in “child” nodes. Presents a data model that organizes documents in a tree-like structure by storing references to “child” nodes in “parent” nodes.
Do you need a data store for MongoDB?
There are no technical requirements for this guide. When setting up a data store, your first task is to answer the question: “What data would I like to store and how do the fields relate to each other?”. This guide uses a hypothetical inventory database to track items and their quantities, sizes, tags, and ratings.
Which is an example of a field in MongoDB?
Here is an example of the types of fields you might wish to capture: While a table might seem like a good place to store data, as you can see from the example above, there are fields in this data set that require multiple values and would not be easy to search or display if modeled in a single column (for example – size and tags ).
Which is a double data type in MongoDB?
Refer the below screenshot and check the key-value pair. The last key is Double, and value is 87.2637, which is a double data type. Like any other programming language or DB, MongoDB recognizes Boolean to simply store, either True or False. Logical