Modern JavaScript from the Beginning - Second Edition - Immediately Invoked Function Expressions (IIFE)

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Information Technology (IT), Architecture
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University
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Hard
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7 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is one of the main reasons to use an IIFE in JavaScript?
To make code more readable
To avoid global scope pollution
To reduce memory usage
To increase execution speed
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the example provided, what issue arises when trying to declare a variable with the same name in different scripts?
The variable is ignored
A syntax error occurs
The script fails to execute
The variable is overwritten
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How is an IIFE typically structured in JavaScript?
As a named function followed by parentheses
As an anonymous function enclosed in parentheses and immediately invoked
As a function declared with 'var' keyword
As a function declared with 'let' keyword
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens if you try to access a variable declared inside an IIFE from outside its scope?
The variable is automatically global
The variable is undefined
An error is thrown
The variable is accessible
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How can parameters be passed to an IIFE?
By using global variables
By passing them as arguments in the invocation parentheses
By using the 'this' keyword
By declaring them inside the function
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a potential risk of using recursion within an IIFE?
It can make the code unreadable
It can slow down the script
It can cause an infinite loop
It can lead to a memory leak
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why might you create a named IIFE?
To reduce code size
To make it globally accessible
For debugging purposes
For better performance
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