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The MongoDB Quiz will give you the complete understanding of Mongo DB concepts. Contenders who want to practice the MongoDB online test can go through the below provided exam. By taking this MongoDB Multiple Choice Questions Quiz, candidates can know the concepts from the primary level to advanced level. After completion of Mongo DB questions, users must click on submit button to get answers with explanation. MongoDB is the open-source document database, and this is leading to NoSQL database. Mongo DB is written in the C++ language.
Mongo DB Quiz Details
| Quiz Name | Mongo DB |
| Category | Technical Quiz |
| Number of Questions | 25 |
| Time | No Time Limit |
| Exam Type | MCQ (Multiple Choice Questions) |
Mongo DB MCQ Quiz Instructions
- Mongo DB Quiz comprises of totally 25 Questions.
- And the time duration allocated for the Mongo DB Quiz is Unlimited.
- And for this quiz, each question is awarded one mark. Remember there is no negative marking.
- Also, Click on the ‘Submit Quiz’ button mentioned at the bottom of this article to Submit your responses.
- Test gets submitted automatically after time duration is Expired.
- And aspirants should note that they should not refresh the Page until the test is finished.
Mongo DB Online Test – Questions and Answers
What is MongoDB?
A) A SQL Database Management System
B) A NoSQL Database Management System
C) A Relational Database Management System
D) A Document-Oriented Database Management System
Answer: D) A Document-Oriented Database Management System
Explanation: MongoDB is a popular NoSQL database management system that is designed to store and retrieve data in a document-oriented manner.
Which of the following data models does MongoDB use?
A) Relational Data Model
B) Hierarchical Data Model
C) Object-Oriented Data Model
D) Document-Oriented Data Model
Answer: D) Document-Oriented Data Model
Explanation: MongoDB uses a document-oriented data model, where data is stored as JSON-like documents with dynamic schemas.
Which of the following is a feature of MongoDB?
A) Supports SQL
B) Supports ACID transactions
C) Supports Multi-document transactions
D) Supports Joins
Answer: C) Supports Multi-document transactions
Explanation: MongoDB supports multi-document transactions that allow you to perform atomic operations across multiple documents.
What is sharding in MongoDB?
A) A technique to store data in a single server
B) A technique to distribute data across multiple servers
C) A technique to store data in a hierarchical manner
D) A technique to store data in a relational manner
Answer: B) A technique to distribute data across multiple servers
Explanation: Sharding is a technique used in MongoDB to distribute data across multiple servers, enabling horizontal scaling.
What is the default port number for MongoDB?
A) 27017
B) 28017
C) 29017
D) 30017
Answer: A) 27017
Explanation: The default port number for MongoDB is 27017.
Which of the following is not a valid data type in MongoDB?
A) String
B) Integer
C) Decimal
D) Timestamp
Answer: C) Decimal
Explanation: The valid data types in MongoDB are string, integer, boolean, date, null, array, and object.
What is the role of MongoDB’s aggregation framework?
A) To perform basic CRUD operations
B) To filter and transform data
C) To manage database transactions
D) To perform schema validation
Answer: B) To filter and transform data
Explanation: The aggregation framework in MongoDB is used to filter, transform, and analyze data in a flexible and powerful way.
What is the default write concern in MongoDB?
A) unacknowledged
B) acknowledged
C) journaled
D) majority
Answer: A) unacknowledged
Explanation: The default write concern in MongoDB is unacknowledged, which means that the write operation is fire-and-forget.
What is the purpose of MongoDB’s secondary indexes?
A) To enforce data consistency
B) To optimize query performance
C) To facilitate data replication
D) To ensure data durability
Answer: B) To optimize query performance
Explanation: Secondary indexes in MongoDB are used to optimize query performance by enabling efficient searching and sorting of data.
What is a capped collection in MongoDB?
A) A collection with a fixed size
B) A collection with a variable size
C) A collection with a predefined schema
D) A collection with an unlimited size
Answer: A) A collection with a fixed size
Explanation: A capped collection in MongoDB is a collection with a fixed size that automatically overwrites the oldest documents with new ones when the collection reaches its size limit.
What is the purpose of the $group operator in MongoDB’s aggregation framework?
A) To filter documents
B) To sort documents
C) To group documents by a specific field or expression
D) To limit the number of documents returned
Answer: C) To group documents by a specific field or expression
Explanation: The $group operator in MongoDB’s aggregation framework is used to group documents by a specific field or expression and perform aggregate operations on the grouped data.
Which of the following is a valid replica set member state in MongoDB?
A) PRIMARY
B) SECONDARY
C) TERTIARY
D) QUATERNARY
Answer: B) SECONDARY
Explanation: The valid replica set member states in MongoDB are PRIMARY, SECONDARY, and ARBITER.
What is the purpose of MongoDB’s text search feature?
A) To perform full-text search on a collection
B) To perform exact match search on a collection
C) To perform fuzzy search on a collection
D) To perform regular expression search on a collection
Answer: A) To perform full-text search on a collection
Explanation: MongoDB’s text search feature enables you to perform full-text search on a collection, searching for words or phrases within a field or set of fields.
What is a database index in MongoDB?
A) A mechanism for storing data in a compressed format
B) A mechanism for ensuring data consistency
C) A mechanism for optimizing query performance
D) A mechanism for encrypting data
Answer: C) A mechanism for optimizing query performance
Explanation: A database index in MongoDB is a mechanism for optimizing query performance by enabling efficient searching and sorting of data.
What is the purpose of the $match operator in MongoDB’s aggregation framework?
A) To group documents
B) To sort documents
C) To limit the number of documents returned
D) To filter documents
Answer: D) To filter documents
Explanation: The $match operator in MongoDB’s aggregation framework is used to filter documents based on specific criteria before processing them further.
What is the purpose of MongoDB’s TTL index?
A) To optimize query performance
B) To enforce data consistency
C) To facilitate data replication
D) To automatically remove documents after a certain time period
Answer: D) To automatically remove documents after a certain time period
Explanation: MongoDB’s TTL (time-to-live) index is used to automatically remove documents after a certain time period, making it useful for managing temporary or time-sensitive data.
What is a MongoDB cursor?
A) A pointer to a result set from a query
B) A mechanism for compressing data
C) A mechanism for encrypting data
D) A mechanism for ensuring data consistency
Answer: A) A pointer to a result set from a query
Explanation: A MongoDB cursor is a pointer to a result set from a query, enabling efficient retrieval of large amounts of data.
What is the purpose of the $unwind operator in MongoDB’s aggregation framework?
A) To group documents
B) To sort documents
C) To limit the number of documents returned
D) To flatten an array field into individual documents
Answer: D) To flatten an array field into individual documents
Explanation: The $unwind operator in MongoDB’s aggregation framework is used to flatten an array field into individual documents, enabling further processing of the data.
What is a MongoDB index prefix?
A) A subset of fields in a compound index
B) A mechanism for ensuring data consistency
C) A mechanism for optimizing query performance
D) A subset of documents in a collection
Answer: A) A subset of fields in a compound index
Explanation: A MongoDB index prefix is a subset of fields in a compound index, enabling efficient searching and sorting of data based on a specific subset of fields.
What is the purpose of the $lookup operator in MongoDB’s aggregation framework?
A) To group documents
B) To sort documents
C) To perform a left outer join between two collections
D) To limit the number of documents returned
Answer: C) To perform a left outer join between two collections
Explanation: The $lookup operator in MongoDB’s aggregation framework is used to perform a left outer join between two collections, enabling you to combine data from multiple collections into a single result set.
About Mongo DB
The database is the container of collections. And each database gets the own set of files from the file system.
The collection is the group of Mongo DB documents. This is relevant to the RDBMS table. And the collection exists within a single database. Documents within a collection will be from different fields.
This document is the set of key-value pairs. And these documents include the dynamic schema. Also, the Dynamic schema is defined as the documents of the same collection.
Benefits Of Practicing Mongo DB Quiz
- Facing this MongoDB MCQ Online Test will become more comfortable for the candidates to have the actual examination.
- And the features like time management and accuracy are can be practiced from this MongoDB MCQ Online Test.
- Moreover, rectification of the mistakes can be done.
- Also, aspirants can know the various levels of questions.
- Thus it helps to improve the confidence levels among the aspirants.
How To Check Mongo DB Programming Online Test Results
Results get displayed after submission of the Mongo DB MCQ Online Test. As soon as the presentation of the answers is done results are viewed automatically. So click on the submit button to see the Mongo DB test results. Also, we request the aspirants not to skip this task.
So aspirants by practicing this MongoDB MCQ Online Test, you feel confident in actual written or online examinations conducted by various companies. Moreover, we request the candidates to practice the MongoDB Quiz as much as you can. Thus it leads to the improvement in the performance.
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