Question:- What is the use of the db command?
Answer:- The db command gives the name of the currently selected database.
Question:- Which method is used to update documents into a collection?
Answer:- The update() and save() methods are used to update documents into a collection.
Question:- What is the syntax of the skip() method?
Answer:- The syntax of the skip() methopd is as follows: >db.COLLECTION_NAME.find().limit(NUMBER).skip(NUMBER)
Question:- Which command is used to restore the backup?
Answer:- The mongorestore command is used to restore the backup.
Question:- What is the use of the dot notation in MongoDB?
Answer:- MongoDB uses the dot notation to access the elements of an array and the fields of an embedded document.
Question:- Define Auditing.
Answer:- Auditing provides administrators with the ability to verify that the implemented security policies are controlling the activity in the system.
Question:- Define the Aggregation pipeline.
Answer:- The aggregation pipeline is a framework for performing aggregation tasks. The pipeline is used to transform documents into aggregated results.
Question:- Define MapReduce.
Answer:- MapReduce is a generic multi-phase data aggregation modality that is used for processing quantities of data.
Question:- What is Splitting in MongoDB?
Answer:- Splitting is a background process that is used to keep chunks from growing too large.
Question:- Which language is used to write for MongoDB?
Answer:- C++ is used for writing and implementing MongoDB.
Question:- In which format does MongoDB store data?
Answer:- MongoDB uses collections to store data rather than tables.
Question:- What is the use of the save() method?
Answer:- The save() method is used to replace the existing document with a new document.
Question:- What is MongoDB?
Answer:- MongoDB (from humongous) is a cross-platform document-oriented database. Classified as a NoSQL database, MongoDB eschews the traditional table-based relational database structure in favor of JSON-like documents with dynamic schemas (MongoDB calls the format ‘BSON’), making the integration of data in certain types of applications easier and faster. Released under a combination of the GNU Affero General Public License and the Apache License, MongoDB is open-source. MongoDB was first developed by the software company 10gen (now, MongoDB Inc.) in October 2007 as a component of a planned platform as a service product. Then, the company shifted to an open-source development model in 2009, with 10gen offering commercial support and other services. Since then, MongoDB has been adopted as backend software by a number of major websites and services, including Craigslist, eBay, Foursquare, SourceForge, Viacom, and the New York Times, among others. Currently, MongoDB is the most popular NoSQL database system.
Question:- What is the use of MongoDB?
Answer:- MongoDB is a relational database management system (RDBMS) replacement for web applications. So, when we have something close to RDBMS, MongoDB could be of good use. It gives us the additional partition tolerance, which RDMBS doesn’t offer, but it has problems with availability. Nonetheless, if we want more scalability, MongoDB would be the right choice for us. It’s suitable for real-time analytics and high-speed logging, and it’s highly scalable as well. Craigslist uses MongoDB for archived posts.