Class 12

• What’s the difference between operational and programmer errors?

Operational: run time problems experienced by correctly written programs, such as failure to connect to a database or a request timeout

Programmer: Bugs in the code that need to be dealt with by the programmer

• What is ‘event-driven’ programming?

The flow of the program is determined by events such as user actions, sensor outputs, or messages passing from other programs

• What are ‘worker processes’?
• Describe how Node.js can be made more scalable.

Cloning, decomposing, splitting

• Explain global installation of dependencies.

Installing dependencies globally instead of locally

• Explain RESTful Web Service.

Emphasizes scalability of interactions, uniform interfaces, independent deployment of components