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The material explains what NoSQL databases are, their main types, and MongoDB’s document-oriented approach using BSON, collections, and features like flexible schemas and expressive queries. It also addresses namespaces, supported programming languages, comparisons with SQL and CouchDB, constraints and ACID behavior, ObjectID structure, indexing, covered queries, and basic data persistence concepts.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":20,"@type":76,"position":81},"https://docshare.wps.com/document/exam/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/mongodb-iinterviiew-questiions/391837/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/mongodb-iinterviiew-questiions/391837.png","ImageObject",300,407,{"name":92,"@type":93},"mieayamfan","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-11-09","2026-09-25",true,{"@type":102,"interactionType":103,"userInteractionCount":39},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What are NoSQL databases and what types exist?","Question",{"text":112,"@type":113},"NoSQL databases store and retrieve data using models other than the tabular relations used in relational databases. Common types listed include document oriented, key value, graph, and column oriented.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"What is a namespace in MongoDB?",{"text":117,"@type":113},"A namespace is the concatenation of the database name and the collection name, such as school.students where school is the database and students is the collection.",{"name":119,"@type":110,"acceptedAnswer":120},"How do indexes and covered queries improve MongoDB performance?",{"text":121,"@type":113},"Indexes enable efficient query execution by limiting the documents MongoDB must inspect. A covered query is one where query and returned fields are satisfied using the same index, avoiding document lookups and improving speed.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},391837,1790831328,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":19,"category_name":20,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":39,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":24,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":143,"read_time":144,"preview_page_count":4},962090893677,"https://ap-avatar.wpscdn.com/davatar_3d24733baf745e90a7e4bdd5f77d97b2","MONGODB IINTERVIIEW QUESTIIONS  \n[http://www.tutorialspoint.com/mongodb/mongodb_interview_questions.htm](http://www.tutorialspoint.com/mongodb/mongodb_interview_questions.htm) Copyright © [tutorialspoint.com](tutorialspoint.com)  \nDear readers, these MongoDB Interview Questions have been designed specially to get you acquainted with the nature of questions you may encounter during your interview for the subject of MongoDB. As per my experience good interviewers hardly plan to ask any particular question during your interview, normally questions start with some basic concept of the subject and later they continue based on further discussion and what you answer:  \nWhat are NoSQL databases? What are the different types of NoSQL databases?  \nA NoSQL database provides a mechanism for storage and retrieval of data that is modeled in means other than the tabular relations used in relational databases likeSQL, Oracle, etc. .  \nTypes of NoSQL databases:  \n Document Oriented  \n Key Value  \n Graph  \n Column Oriented  \nWhat kind of NoSQL database MongoDB is?  \nMongoDB is a document oriented database . It stores data in the form of BSON structure based documents. These documents are stored in a collection.  \nWhich are the most important features of MongoDB?  \n Flexible data model in form of documents  \n Agile and highly scalable database  \n Faster than traditional databases  \n Expressive query language What is a Namespace in MongoDB?  \nA Namespace is the concatenation of the database name and collection name . For e .g. school.students with school as the database and students as the collection  \nWhich all languages can be used with MongoDB?  \nCurrently, MonggoDB provides official driver support for C , C++ , C\\# , Java , Node .js, Perl , PHP, Python , Ruby, Scala , Go and Erlang. MongoDB can easily be used with any of these languages. There are some other community supported drivers too but the above mentioned ones are officially provided by MongoDB.  \nCompare SQL databases and MongoDB at a high level.  \nSQL databases store data in form of tables, rows, columns and records. This data is stored in a predefined data model which is not very much flexible for today's real-world highly growing applications. MongoDB in contrast uses a flexible structure which can be easily modified and extended.  \nHow is MongoDB better than other SQL databases?  \nMongoDB allows a highly flexible and scalable document [structure. For e.g. one](structure. For e.g. one) data document in MongoDB can have five columns and the other one in the same collection can have ten columns. Also , MongoDB database are faster as compared to SQL databases due to efficient indexing and storage techniques.  \nCompare MongoDB and CouchDB at high level.  \nAlthough both of these databases are document oriented , MongoDB is a better choice for applications which need dynamic queries and good performance on a very big database . On the other side , CouchDB is better used for applications with occasionally changing queries and predefined queries.  \nDoes MongoDB support foreign key constraints?  \nNo . MongoDB does not support such relationships.  \nDoes MongoDB support ACID transaction management and locking functionalities?  \nNo . MongoDB does not support default multi-document ACID transactions. However , MongoDB provides atomic operation on a single document.  \nHow can you achieve primary key-foreign key relationships in MongoDB?  \nBy default MongoDB does not support such primary key-foreign key relationships. However , we can achieve this concept by embedding one document inside another . Foe e .g. an address document can be embedded inside customer document.  \nDoes MongoDB need a lot of RAM?  \nNo . MongoDB can be run even on a small amount of RAM. MongoDB dynamically allocates and deallocates RAM based on the requirements of other processes.  \nDoes MongoDB pushes the writes to disk immediately or lazily?  \nMongoDB pushes the data to disk lazily. It updates the immediately written to th","cbCaiaAO2FF19PmC","https://ap.wps.com/l/cbCaiaAO2FF19PmC","pdf",51427,"English","# MongoDB Interview Questions\n## NoSQL basics and MongoDB overview\n## MongoDB features and concepts\n## Comparisons: SQL and CouchDB\n## Constraints, transactions, and data relationships\n## ObjectID and document handling\n## Indexing and covered queries","[{\"question\":\"What are NoSQL databases and what types exist?\",\"answer\":\"NoSQL databases store and retrieve data using models other than the tabular relations used in relational databases. Common types listed include document oriented, key value, graph, and column oriented.\"},{\"question\":\"What is a namespace in MongoDB?\",\"answer\":\"A namespace is the concatenation of the database name and the collection name, such as school.students where school is the database and students is the collection.\"},{\"question\":\"How do indexes and covered queries improve MongoDB performance?\",\"answer\":\"Indexes enable efficient query execution by limiting the documents MongoDB must inspect. A covered query is one where query and returned fields are satisfied using the same index, avoiding document lookups and improving speed.\"}]","MONGODB IINTERVIIEW QUESTIIONS | PDF",1790359334,13]