NOSQL-VIVA1-Test

You are designing a NoSQL database schema for an online gaming platform. Each game has a unique ID, a name, and a list of players. The number of players can vary for each game. Which of the following data models would be most suitable for storing this data?

• A. Key-Value Store
  

• B. Document Database
  

• C. Graph Database
  

• D. Column Family Store

You have a MongoDB collection with documents representing books. Each document has a title, author, and publication year. You want to retrieve all books published after a certain year. Which MongoDB query would you use?

• A.

  db.books.find({ "publicationYear": { $gt: 2000 } });

• B.

  db.books.find({ "publicationYear": { $gte: 2000 } });

• C.

  db.books.find({ "publicationYear": { $lt: 2000 } });

• D.

  db.books.find({ "publicationYear": { $lte: 2000 } });

Which of the following code snippets demonstrates the correct way to insert a document into a MongoDB collection using the Mongo Shell?

• A.

  db.collection.add({ name: "John", age: 25 });

• B.

  db.collection.insertOne({ name: "John", age: 25 });

• C.

  db.collection.save({ name: "John", age: 25 });

• D.

  db.collection.create({ name: "John", age: 25 });

Q. What is a NoSQL database index?

• A. A data structure that improves the speed of data retrieval operations
  

• B. A unique identifier assigned to each document in a NoSQL database
  

• C. A technique for organizing data in a hierarchical manner
  

• D. A method for ensuring data consistency across multiple replicas

You are designing a social media platform and need to store user profiles. Each profile includes basic information like name, age, and location, as well as a list of their posts. Which NoSQL database model would be most suitable for this scenario?

• A. Key-Value Store
  

• B. Document Database
  

• C. Graph Database
  

• D. Column Family Store

What is a distributed NoSQL database?

• A. A NoSQL database that runs on a single, powerful server
  

• B. A NoSQL database that is replicated across multiple servers
  

• C. A NoSQL database that is partitioned and distributed across a cluster of machines
  

• D. A NoSQL database that is designed to work with distributed file systems

What is a document database?

• A. A database that stores data in tables with rows and columns
  

• B. A database that uses a hierarchical model to organize data
  

• C. A database that stores semi-structured data as documents
  

• D. A database that models data as objects and their relationships

What is sharding in the context of NoSQL databases?

• A. The process of splitting a database into multiple smaller databases
  

• B. A technique for replicating data across multiple servers
  

• C. A method for distributing data evenly across a cluster of machines
  

• D. A way to ensure data consistency across multiple data centers

Which NoSQL database type is best suited for social networking applications?

• A. Key-Value
  

• B. Document
  

• C. Graph
  

• D. Object-Oriented

Which of the following is NOT a benefit of using a NoSQL database?

• A. Improved performance for large datasets
  

• B. Support for complex transactions
  

• C. Flexible schema design
  

• D. Scalability to handle high volumes of data