Advanced JavaScript

Functions cannot be passed as parameters

• True

• False

Callback functions are used like this

• True

• False

Callback functions are more of a restriction in JS than an advantage

• True

• False

Which of the following functions doesn't take a callback function as one of its parameters?

• .addEventListener()

• .reduce()

• .splice()

• .filter()

What is the correct explanation of this code?

• sayHi is a function that returns a string that goes into a console.log to get info

• sayHi is a function that returns a string and will be executed in 1s

• sayHi is a function that returns a string and gets executed in 1000ms but nothing will be printed out because we don't have console.log

A function can be called a limited number of times

• True

• False

Answer explanation

The core thing that makes a function useful is the fact that you can use it an unlimited amount of times

Is Array.map a high order function?

• Yes

• No

What will be logged?

• ["J", "D","A","M"]

• "JDAM"

• ["John,"Doe","Ali","Mariam"]

• ["JDAM"]

What will be logged?

• 10

• [10,10,10,10]

• [1,3,5,7]

• 16

Array.map takes a function as a param, and this function can only take 1 param which is the current element in the array

• True

• False