javascript timers

Question 1

What is a “callback” function?

Answer 1

A callback function is a function passed into another function as an argument, which is then invoked inside the outer function to complete some kind of routine or action.

Question 2

Besides adding an event listener callback function to an element or the document, what is one way to delay the execution of a JavaScript function until some point in the future?

Answer 2

setTimeout() method

Question 3

What is the default time delay if you omit the delay parameter from setTimeout() or setInterval()?

Answer 3

the value of 0 which means immmediately

Question 4

How can you set up a function to be called repeatedly without using a loop?

Answer 4

a callback function to the setInterval method

Question 5

What do setTimeout() and setInterval() return?

Answer 5

a function within a certain interval of time