Server-Side Computing Model Quiz (Lec5)

Which method is used to insert a document into a MongoDB collection?

find
updateOne
insertOne (correct)
deleteOne

What is the purpose of the `find` method in MongoDB?

To delete a document from a collection
To create a new collection
To update a document in a collection
To query and retrieve documents from a collection (correct)

How can you limit the number of documents returned by a `find` query in MongoDB?

By using the `limit` method (correct)
By using the `sort` method
By using the `aggregate` method
By using the `count` method

Which method is used to update a document in a MongoDB collection?

updateOne (B) Signup and view all the answers

What is the purpose of the `_id` field in MongoDB?

To uniquely identify a document (C) Signup and view all the answers

Which of the following best describes a callback function in Node.js?

A callback function is a function that is passed as an argument into another function and can be invoked inside the outer function. (A) Signup and view all the answers

What is the purpose of using callback functions in Node.js?

To make the program asynchronous and prevent I/O blocking. (C) Signup and view all the answers

What is the typical structure of a callback function in Node.js?

function(err, results) { // code to be executed } (D) Signup and view all the answers

What is the purpose of the first argument in a callback function in Node.js?

To pass an Error object if an error occurred. (C) Signup and view all the answers

When using callback functions in Node.js, what happens if no error occurred during the operation?

The first argument of the callback function should be null. (D) Signup and view all the answers

Which of the following is NOT a step in creating a MongoDB document?

Close MongoDB connection (B) Signup and view all the answers

What is the purpose of the 'required' validator in Mongoose?

To ensure that a field must have a value (C) Signup and view all the answers

Which validator can be used to specify a range for a number field in Mongoose?

Min (D) Signup and view all the answers

What is the purpose of the 'enum' validator in Mongoose?

To validate that a field can only have specific values (B) Signup and view all the answers

What is the purpose of the 'match' validator in Mongoose?

To validate the format of a field (C) Signup and view all the answers

Which of the following best describes Mongoose?

A tool for building MongoDB object modeling in Node.js (B) Signup and view all the answers

What does ODM stand for in the context of Node.js?

Object Document Mapper (D) Signup and view all the answers

How can you install Mongoose?

Both A and B (C) Signup and view all the answers

What are Schemas in Mongoose?

They describe the data construct of a document and define the name and type of data (A) Signup and view all the answers

How can you connect to MongoDB using Mongoose?

By using the mongoose.connect() function (C) Signup and view all the answers

Which of the following is the correct way to install the MongoDB Node.js driver?

Use npm to install the MongoDB Node.js driver. (C) Signup and view all the answers

What is the purpose of the Waterfall pattern in JavaScript callback functions?

To waterfall through function chains and handle errors in the original invoking function. (D) Signup and view all the answers

What are the two most common HTTP methods for a request-response between a client and a server?

GET and POST (B) Signup and view all the answers

What is the purpose of the 'npm start' command in Node.js app development?

To run the startup script specified in the package.json file. (D) Signup and view all the answers

What is the purpose of the 'assert' module in the MongoDB Node.js driver?

To check for connection and insertion errors. (A) Signup and view all the answers

Which of the following is true about Base64 encoding?

Base64 encoding schemes are commonly used for storing and transferring binary data. (D) Signup and view all the answers

Which of the following is true about GridFS?

GridFS divides a file into parts, or chunks, and stores each chunk as a separate document. (C) Signup and view all the answers

What is the maximum size of a BSON document in MongoDB?

16 megabytes (C) Signup and view all the answers

What are the two collections used by GridFS to store files?

chunks and metadata (C) Signup and view all the answers

What is the purpose of using GridFS?

To store and retrieve files that exceed 16 megabytes in size (B) Signup and view all the answers

What is the purpose of Base64 encoding?

The purpose of Base64 encoding is to encode binary data in a way that it can be stored and transferred over media designed to deal with textual data. It ensures that the data remains intact without modification during transport. Signup and view all the answers

What is the maximum size of a BSON document in MongoDB?

The maximum size of a BSON document in MongoDB is 16MB. Signup and view all the answers

What is GridFS?

GridFS is a specification for storing and retrieving files that exceed the BSON-document size limit of 16 megabytes. It divides a file into parts, or chunks, and stores each of those chunks as a separate document. Signup and view all the answers

What are the two collections used by GridFS to store files?

GridFS uses two collections to store files: the chunks collection, which stores the file chunks, and the files collection, which stores the file metadata. Signup and view all the answers

What is the purpose of using GridFS?

GridFS is useful for storing files that exceed 16 megabytes, as well as for storing any files that you want to access without having to load the entire file into memory. Signup and view all the answers

What are the pros and cons of storing album details in a database and photos in a filesystem?

Pros: Allows for efficient storage and retrieval of album details and photos separately. Cons: Requires managing two separate storage systems, may introduce complexity in synchronizing album details and photos. Signup and view all the answers

What are the pros and cons of storing album details and photos in a database?

Pros: Simplifies storage and retrieval by keeping all data in one system. Cons: May introduce performance issues with large files, may require additional configuration for handling binary data. Signup and view all the answers

What is the purpose of the 'assert' module in the MongoDB Node.js driver?

The 'assert' module is used for basic assertion testing in the MongoDB Node.js driver. It is used to check if a given condition is true and throw an error if it is not. Signup and view all the answers

What is the purpose of the 'findOne' method in MongoDB?

The 'findOne' method is used to query a collection in MongoDB and retrieve the first document that matches the specified criteria. Signup and view all the answers

What is the purpose of the 'mimetype' field in the GridFS file metadata?

The 'mimetype' field in the GridFS file metadata is used to store the MIME type of the file, which indicates the type of data contained in the file. Signup and view all the answers

Server-Side Computing Model Quiz (Lec5)

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Questions and Answers

Which method is used to insert a document into a MongoDB collection?

What is the purpose of the find method in MongoDB?

How can you limit the number of documents returned by a find query in MongoDB?

Which method is used to update a document in a MongoDB collection?

What is the purpose of the _id field in MongoDB?

Which of the following best describes a callback function in Node.js?

What is the purpose of using callback functions in Node.js?

What is the typical structure of a callback function in Node.js?

What is the purpose of the first argument in a callback function in Node.js?

When using callback functions in Node.js, what happens if no error occurred during the operation?

Which of the following is NOT a step in creating a MongoDB document?

What is the purpose of the 'required' validator in Mongoose?

Which validator can be used to specify a range for a number field in Mongoose?

What is the purpose of the 'enum' validator in Mongoose?

What is the purpose of the 'match' validator in Mongoose?

Which of the following best describes Mongoose?

What does ODM stand for in the context of Node.js?

How can you install Mongoose?

What are Schemas in Mongoose?

How can you connect to MongoDB using Mongoose?

Which of the following is the correct way to install the MongoDB Node.js driver?

What is the purpose of the Waterfall pattern in JavaScript callback functions?

What are the two most common HTTP methods for a request-response between a client and a server?

What is the purpose of the 'npm start' command in Node.js app development?

What is the purpose of the 'assert' module in the MongoDB Node.js driver?

Which of the following is true about Base64 encoding?

Which of the following is true about GridFS?

What is the maximum size of a BSON document in MongoDB?

What are the two collections used by GridFS to store files?

What is the purpose of using GridFS?

What is the purpose of Base64 encoding?

What is the maximum size of a BSON document in MongoDB?

What is GridFS?

What are the two collections used by GridFS to store files?

What is the purpose of using GridFS?

What are the pros and cons of storing album details in a database and photos in a filesystem?

What are the pros and cons of storing album details and photos in a database?

What is the purpose of the 'assert' module in the MongoDB Node.js driver?

What is the purpose of the 'findOne' method in MongoDB?

What is the purpose of the 'mimetype' field in the GridFS file metadata?

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