Correct Answer : app.use(middleware)
Explanation : Mounting middleware functions to the Koa application is accomplished using app.use(middleware).
Correct Answer : App.keys
Explanation : app.keys, property is used to specify the keys that will be used to sign and verify cookies.
app.keys
Correct Answer : Cascading
Explanation : Cascading in Koa.js refers to the sequence in which middleware functions are run.
Correct Answer : Cookies
Explanation : Cookies are basic, short files/data that are given to the client in conjunction with a server request and saved on the client side.