var, let, or const inside a function?
var, let, or const inside a function, it becomes a global variable.
How do you declare a global variable inside a function?
A). Using var
B). Using let
C). Using const
D). Assigning to window
How can you access a global variable inside a function if it has the same name as a local variable?
A). By using the window object
B). By using the global object
C). By using a different name for the global variable
D). By using the this keyword
What is the purpose of the global object in JavaScript?
A). To store local variables
B). To provide a namespace for global variables and functions
C). To define constants
D). To execute code in strict mode
How can you avoid global scope pollution?
A). By using local variables
B). By using IIFE (Immediately Invoked Function Expressions)
C). By using modules
D). All of the above
Which keyword is used to declare a variable in the global scope?
A). let
B). var
C). const
D). function
Which of the following can create a global variable?
A). var
B). let
C). const
D). All of the above
What will be the output of console.log(window.myVar); if var myVar = 'Hello'; is declared outside any function?
A). Hello
B). undefined
C). error
D). null
What happens if you declare a variable inside a function with the same name as a global variable?
A). It creates a new local variable
B). It throws an error
C). It modifies the global variable
D). It assigns the global variable to null
What is the output of console.log(window.globalLet); if let globalLet = 'Hello'; is declared in the global scope?
A). Hello
B). undefined
C). error
D). null
In Node.js, what is the global object called?
A). window
B). global
C). document
D). process