RESTful Web API Design with Node.js (Video 22)

The video tutorial covers various caching techniques, including HTTP caching, in-memory data stores, and reverse proxy caching. It demonstrates HTTP caching using Google Chrome and explains the roles of Memcached and Redis as in-memory data stores. The video also introduces reverse proxy caching with Varnish. The course concludes with a summary of key concepts and encourages further exploration of API development.

What is the purpose of the 'Cache-Control: no-cache' header in HTTP?

• To allow the browser to cache data indefinitely

• To enable caching only for images

• To instruct caches to always fetch a fresh copy from the origin server

• To prevent the browser from storing any data

What is the role of the ETag header in HTTP caching?

• To define the content type of the resource

• To act as a checksum for cache validation

• To indicate the size of the resource

• To specify the expiration time of a resource

Which of the following is a key feature of Memcached?

• Supports clustering out of the box

• Acts as a message broker

• Is a key-value store kept in memory

• Can be used as a full-fledged database

What is a significant advantage of in-memory data stores over traditional databases?

• They are more secure

• They do not require disk access

• They are easier to scale

• They support more data types

How does Varnish help in reducing server load?

• By managing database connections

• By encrypting data between client and server

• By caching HTTP requests and responses

• By compressing HTTP responses

Which tool is mentioned as a popular reverse proxy cache?

• Memcached

• Varnish

• Apache

• Redis

What is one of the main topics covered in the course summary?

• The architecture of REST

• The history of HTTP

• The development of web browsers

• The evolution of programming languages