MongoDB Interview Questions and Answers
Question - 51 : - What is a Collection in MongoDB?
Answer - 51 : - In MongoDB, a collection is a group of MongoDB documents.
Question - 52 : - What is the use of the db command?
Answer - 52 : - The db command gives the name of the currently selected database.
Question - 53 : - Which method is used to update documents into a collection?
Answer - 53 : - The update() and save() methods are used to update documents into a collection.
Question - 54 : - Which command is used to restore the backup?
Answer - 54 : - The mongorestore command is used to restore the backup.
Question - 55 : - What is the use of the dot notation in MongoDB?
Answer - 55 : - MongoDB uses the dot notation to access the elements of an array and the fields of an embedded document.
Question - 56 : - Define the Aggregation pipeline.
Answer - 56 : - The aggregation pipeline is a framework for performing aggregation tasks. The pipeline is used to transform documents into aggregated results
Question - 57 : - Define MapReduce.
Answer - 57 : - MapReduce is a generic multi-phase data aggregation modality that is used for processing quantities of data
Question - 58 : - What is Splitting in MongoDB?
Answer - 58 : - Splitting is a background process that is used to keep chunks from growing too large.
Question - 59 : - Which language is used to write for MongoDB?
Answer - 59 : - C++ is used for writing and implementing MongoDB.
Question - 60 : - In which format does MongoDB store data?
Answer - 60 : - MongoDB uses collections to store data rather than tables